Crest Audio X-VCA Owner's Manual
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Crest Audio X-VCA Owner's Manual

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Summary of Contents for Crest Audio X-VCA

  • Page 1 (PRELIMINARY COPY) X-VCA mixing consoles...
  • Page 2 X-VCA block diagram X-VCA owner’s manual CARD INTERFACE MICRO GROUP PART...

  • Page 3: Table Of Contents

    table of contents mono input module Mic and line inputs stereo input module Line inputs and stereo returns group module VCA groups, audio groups, dynamics, matrix and Aux masters left, right & mono masters master control section microprocessor control vca facilities p.

  • Page 5: How To Use This Manual

    The intention is to make the manual easy to read while including all the technical details needed for getting the most out of the X-VCA console, a flexible and feature-rich addi- tion to Crest Audio's growing line of audio mixing console products.

  • Page 6: Mono Input Module

    – • – • – • SHELF SHELF – + FREQ INSERT ODD - L R - EVEN SAFE PREVIEW MUTE –6 L- R PAN ON GROUPS SOLO ASSIGN p. 6 X-VCA owner’s manual panel + 48V LINE Ø GAIN...

  • Page 7: Phantom Power +48V

    features phantom power +48V 48 volts DC is applied to pins 2 and 3 on the mic-input XLR connector. This option is used with condenser microphones and active direct boxes that require an external DC voltage (phantom power) in order to operate. The mic-input signal is attenuated by 20dB to prevent some signals (e.g.
  • Page 8 – • – • – • SHELF SHELF – + FREQ INSERT ODD - L R - EVEN SAFE PREVIEW MUTE –6 L- R PAN ON GROUPS SOLO ASSIGN p. 8 X-VCA owner’s manual panel + 48V LINE Ø GAIN...
  • Page 9 features gain The Input gain control range is closely related to the status of the switch. In order to establish proper gain structure in the console, input LINE gain settings must be set correctly. —switch-up LINE 15 to 75dB of gain can be added the mic-input signal. The impedance at the input XLR is 4kΩ.
  • Page 10 SHELF – + FREQ INSERT ODD - L R - EVEN SAFE PREVIEW MUTE –6 L- R PAN ON GROUPS SOLO ASSIGN p. 10 X-VCA owner’s manual panel – • – • – • – • – • – •...
  • Page 11 aux send features Eight auxiliary sends are available for creating individual output mixes. These can be used to drive effects processors, provide monitor mixes, create broadcast or alternate sound reinforcement mixes, or for other special requirements. Each pair of odd/even Aux buses (1&2, 3&4, etc.) can be treated as individual discrete mono sends, or as stereo pairs.
  • Page 12 – • – • – • SHELF SHELF – + FREQ INSERT ODD - L R - EVEN SAFE PREVIEW MUTE –6 L- R PAN ON GROUPS SOLO ASSIGN p. 12 X-VCA owner’s manual panel SHELF SHELF – + FREQ...
  • Page 13 EQ features Many audio signals coming into the console require some degree of corrective eq in order to be part of a good sounding mix.The X-VCA offers an uncompro- mised, full parametric EQ on each channel. The input EQ consists of four full parametric bands: high, high-mid, low-mid, and low.
  • Page 14 – • – • – • SHELF SHELF – + FREQ INSERT ODD - L R - EVEN SAFE PREVIEW MUTE –6 L- R PAN ON GROUPS SOLO ASSIGN p. 14 X-VCA owner’s manual panel SHELF – + FREQ INSERT...
  • Page 15 high-pass filter—HPF Proper use of the high-pass filter reduces or eliminates unwanted low frequencies without substantially affecting the program material. Quite often such unwanted low frequencies are included with in-coming mic- or line-input signals. For exam- ple, stage rumble or wind can be picked up through vocal mics.The slope of the high-pass filter is 12dB per octave.
  • Page 16 SHELF – + FREQ INSERT ODD - L R - EVEN SAFE PREVIEW MUTE –6 L- R PAN ON GROUPS SOLO ASSIGN p. 16 X-VCA owner’s manual panel – + FREQ INSERT ODD - L R - EVEN SAFE PREVIEW...

  • Page 17: Pan Control

    Insert features Insert ON switch The Insert point is located after the EQ and before the Low Pass Filter. External signal processors can be inserted into the channel via 1/4" TRS connectors (send and return) on the rear panel.The SEND signal is unbal- anced and the RETURN can accept both unbalanced and balanced signals.
  • Page 18 • SHELF SHELF – + FREQ INSERT ODD - L R - EVEN SAFE PREVIEW MUTE –6 L- R PAN ON GROUPS SOLO ASSIGN p. 18 X-VCA owner’s manual panel – 6 L - R PAN ON GROUPS SOLO ASSIGN...

  • Page 19: Level Meter

    level meter features level meter Each input includes a five-segment LED meter for visu- ally monitoring signal levels.This is essential for setting up and maintaining proper gain structure. peak indicator—PK The input signal is monitored at several points throughout the channel. These points are the mic preamp, the EQ stage and the fader stage.
  • Page 20 ODD - L R - EVEN SAFE PREVIEW MUTE –6 L- R PAN ON GROUPS SOLO ASSIGN p. 20 X-VCA owner’s manual panel ODD - L R - EVEN SAFE PREVIEW MUTE – 6 L - R PAN ON GROUPS SOLO...
  • Page 21 bus assignment features The Input bus assignment section offers considerable flexibility for creating what eventually becomes the main output mix. Such features as eight-individual group assignments allow several approaches to building the desired mix.All assignments are derived post-fader, post-eq, and post-mute. pan control The pan control positions the signal within the stereo left/right field, (or between left / center or center / right in...
  • Page 22 • SHELF SHELF – + FREQ INSERT ODD - L R - EVEN SAFE PREVIEW MUTE –6 L- R PAN ON GROUPS SOLO ASSIGN p. 22 X-VCA owner’s manual panel – 6 L - R PAN ON GROUPS SOLO ASSIGN...

  • Page 23: Input Fader

    features input fader The input fader is the primary level control for signals being sent to any of the consoles mix buses.The signals affected are the AUX sends selected to be pre- fader.The fader offers greater than 80dB of attenuation and up to 10dB of boost . Normal operation is between -10 and 0.

  • Page 24: Block Diagram

    Direct Direct Bal Line In Bal Line In Bal Line In Bal Mic In Bal Mic In Bal Mic In X-VCA owner’s manual Direct Direct Direct Bal Line In Bal Line In Bal Line In Bal Mic In Bal Mic In...

  • Page 25: Rear Panel Features

    rear panel features direct out 1/4" TRS jack The input channel's signal is available at this output jack.The default sig- nal routing is derived post-fader, post-eq and post-mute.This output jack is ground-compensated. insert points Separate 1/4" TRS jacks provide the facilities for inserting an external signal processor into the signal path of the input channel.

  • Page 26: Stereo Input Module

    • – • – • – • – – – – STEREO INPUT ODD - L R - EVEN SAFE PREVIEW MUTE L- R BAL ON GROUPS SOLO ASSIGN p. 26 X-VCA owner’s manual LINE 2 MONO Ø GAIN –...
  • Page 27 features The Stereo Input Module can be configured to accept either a stereo pair of sig- nals or a standard mono signal. Unlike the Mono Input module, the Stereo input modules do not have mic preamps and their associated features (48 V phantom power and PAD).
  • Page 28 • – • – • – • – – – – STEREO INPUT ODD - L R - EVEN SAFE PREVIEW MUTE L- R BAL ON GROUPS SOLO ASSIGN p. 28 X-VCA owner’s manual LINE 2 MONO Ø GAIN –...
  • Page 29 features polarity reverse—ø This switch inverts the polarity of the right input signal in relation to the left input signal. see—mono input module for more info on polarity reverse Polarity of the right input signal is inverted. Polarity of the right input signal is not inverted. input gain—...
  • Page 30 • – – – – STEREO INPUT ODD - L R - EVEN SAFE PREVIEW MUTE L- R BAL ON GROUPS SOLO ASSIGN p. 30 X-VCA owner’s manual – • – • – • – • – • – •...
  • Page 31 aux send features Refer to the Mono Input Module for basic information on the Aux sends.What's covered here is information that is specific to the Stereo Input module. As we already covered on the Mono Input module, each of the odd/even pairs can be globally configured to operate as level / level (for normal mono operation) or level / pan (for stereo operation).The global configuring is done in the Aux masters which are located on the Group modules.
  • Page 32 • – • – • – • – • – – – – STEREO INPUT ODD - L R - EVEN SAFE PREVIEW MUTE L- R BAL ON GROUPS SOLO ASSIGN p. 32 X-VCA owner’s manual – – – –...
  • Page 33 EQ features The X-VCA Stereo Input module offers four bands of EQ - High, High mid, Low mid and Low.The High and Low are shelving type EQ and the High mid and Low mid have a fixed (non-adjustable) Q of 1. Although the left and right signals are processed separately, the paramaters are set in tandem by common front panel controls.
  • Page 34 STEREO INPUT ODD - L R - EVEN SAFE PREVIEW MUTE L- R BAL ON GROUPS SOLO ASSIGN p. 34 X-VCA owner’s manual STEREO INPUT ODD - L R - EVEN SAFE PREVIEW MUTE L - R BAL ON GROUPS...

  • Page 35: Metering Features

    metering features Balance control See description of Bus Assignment features later in this section safe preview Safe Preview LED See LOCAL MICROPROCESSOR CONTROL section mute Mute switch See LOCAL MICROPROCESSOR CONTROL section write-in label This label may be written on with a grease-marker, or dry-erase pen and later wiped clean.
  • Page 36 STEREO INPUT ODD - L R - EVEN SAFE PREVIEW MUTE L- R BAL ON GROUPS SOLO ASSIGN p. 36 X-VCA owner’s manual STEREO INPUT ODD - L R - EVEN SAFE PREVIEW MUTE L - R BAL ON GROUPS...

  • Page 37: Balance Control

    Bus assignment features Balance control The Balance control adjusts the Stereo balance for the Left/Right assignment and Group assignment sections when the BAL ON button is depressed balance on—groups— BAL ON The left and right signals are summed as mono before being routed to the L- R and Group assignments.
  • Page 38 • – • – • – – – – STEREO INPUT ODD - L R - EVEN SAFE PREVIEW MUTE L- R BAL ON GROUPS SOLO ASSIGN p. 38 X-VCA owner’s manual L - R BAL ON GROUPS SOLO ASSIGN...
  • Page 39 stereo input module features input fader The input fader is the primary level control for signals being sent to any of the consoles mix buses.The signals affected are the AUX sends selected to be pre- fader.The fader offers greater than 80dB of attenuation and up to 10dB of boost . Normal operation is between -10 and 0.The fader itself is a 100mm 10K linear taper slide potentiometer.
  • Page 40 Line In 2 Line In 2 Bal Line In 2 Bal Line In 2 Bal Line In 2 Bal Line In 2 Bal Line In 1 Bal Line In 1 Bal Line In 1 Bal Line In 1 X-VCA owner’s manual...

  • Page 41: Rear Panel Features

    stereo input module rear panel features The stereo line-input module provides connectors for three stereo line-level sig- nals. see—line 2 switch. balanced left and right line-in XLR connectors These two jacks accept balanced or unbalanced +4dB line level sig- nals.The 2 switch on front-panel must be disengaged for these connectors to LINE be active.

  • Page 42: Group Module

    VCA 1 VCA 2 ASSIGN ASSIGN VCA 1 VCA 2 SOLO SOLO ASSIGN ASSIGN p. 42 MICRO GROUP PART X-VCA owner’s manual panel AUX 1 – 2 STEREO PAIR INPUT SENDS SAFE SAFE PREVIEW PREVIEW MUTE MUTE OUTPUT OUTPUT –...
  • Page 43 group module features The Group modules are physically configured in pairs, four pairs making up the eight Groups. Each of the eight Group modules offer identical functions for the eight associated Aux Masters, Audio Groups, and VCA Groups. Each group module includes the following sections: *Aux output control *Matrix send *Groups dynamics control with gain reduction meter...
  • Page 44 MUTE UNITY UNITY EDIT EDIT VCA 1 VCA 2 ASSIGN ASSIGN VCA 1 VCA 2 SOLO SOLO ASSIGN ASSIGN p. 44 X-VCA owner’s manual panel MATRIX MATRIX SENDS SENDS – – • • – – • • – – •...

  • Page 45: Matrix Sends

    The X-VCA includes four of signals from the eight GROUPS source. See Master section for more information. For expanded Matrixing capabil- ities, a 37 pin d-sub connector is included on the rare panel which contains all or the primary outputs. See Group module rear panel description for more informa- tion.
  • Page 46 VCA 2 ASSIGN ASSIGN VCA 1 VCA 2 SOLO SOLO ASSIGN ASSIGN p. 46 CARD INTERFACE MICRO GROUP PART X-VCA owner’s manual panel GATE GATE RATIO RATIO – 20 – 20 GAIN GAIN (DB ) (DB ) RATIO RATIO –...
  • Page 47 The X-VCA Audio Group and Master modules include a number of features for flexible dynamic control of signal levels. On Group modules, the com- pressor and gate functions may be engaged separately or simultaneously. For a comprehensive discussion of these features, see Section on Dynamics Control Operation.
  • Page 48 VCA 2 ASSIGN ASSIGN VCA 1 VCA 2 SOLO SOLO ASSIGN ASSIGN p. 48 CARD INTERFACE MICRO GROUP PART X-VCA owner’s manual panel GROUP GROUP SAFE SAFE PREVIEW PREVIEW MUTE MUTE GATE GATE ( DB ) ( DB ) COMP...
  • Page 49 group dynamics section Note:The following dynamics controls are located adjacent to the Group fader. gate ON (downward expander) Activates the gate (downward expander) function. gate ON/THR (Threshold) dual color LED Illuminates GREEN when the gate system is active. Illuminates RED when the group's signal level reaches the threshold level set by the GATE THR control.
  • Page 50 UNITY EDIT EDIT VCA 1 VCA 2 ASSIGN ASSIGN VCA 1 VCA 2 SOLO SOLO ASSIGN ASSIGN p. 50 X-VCA owner’s manual panel GROUP SAFE SAFE PREVIEW PREVIEW MUTE MUTE GATE GATE CARD RFACE ( DB ) ( DB )
  • Page 51 audio group control features This section provides standard features for the Group bus masters. Signals that are assigned to the Audio groups are summed together to make up the audio Groups. A full featured dynamics control section (see previous section) can be engaged for pro- cessing the summed group signals.These signals can be assigned to the Left, Right and Mono buses and appear at the Group output jacks on the rear panel.
  • Page 52 UNITY UNITY EDIT EDIT VCA 1 VCA 2 ASSIGN ASSIGN VCA 1 VCA 2 SOLO SOLO ASSIGN ASSIGN p. 52 X-VCA owner’s manual panel MUTE MUTE UNITY UNITY EDIT EDIT CARD VCA 1 VCA 2 ASSIGN ASSIGN VCA 1 SOLO...
  • Page 53 VCA group master control features This section controls VCA levels of any assigned input channels or audio groups assigned to the VCA group.VCA control of audio groups is a unique feature not offered on most other VCA consoles. For more information on using VCA control of audio groups, see Section on VCA Group Operation.
  • Page 54 Insert Send Send Send Return Return Left p. 54 Lamp Meter Bridge Group Out Group Out Group Out Insert Insert Send Send Return Return Return X-VCA owner’s manual Group Out Group Out Insert Insert Send Send Return Return Insert Send...

  • Page 55: Rear Panel Features

    rear panel features lamp dim Goose-neck lamps light-up at full intensity. Goose-neck lamps light-up at medium intensity. meter bridge connector This connector carries all of the required connections up to the meter bridge. While patching the console, care should be taken not to damage this connector or the ribbon that plugs into it.

  • Page 56: Stereo Inputs

    Send Return Return Assist Out Alt R Out Alt L Out DC In Group In Group In DI Out master p. 56 X-VCA GROUP OUTPUT (1 OF 8 SHOWN) GROUP INSERT GROUP PRE MUTE GROUP GROUP FADER POST GROUP ATTENUATION...
  • Page 57 rear panel features group output This balanced male XLR connector carries the group fader, front-panel description group insert point Separate 1/4" TRS jacks provide the ability to insert an external signal processor into the signal path of the GROUP ON switch. group insert send This output connects to the input of an external signal processor.

  • Page 58: Left, Right & Mono Masters

    ASSIGN SINGLE FOLLOW SCENE EDIT CHAN VCA ASN SELECT A – CHANNEL – TO ASSIGN L / R MONO SOLO SOLO p. 58 X-VCA owner’s manual panel SAFE SAFE PREVIEW PREVIEW MUTE MUTE OUTPUT OUTPUT – – • • TALK...
  • Page 59 / right & mono master modules features Aside from their Left / Right and Mono assignments, the X-VCA Left / Right and Mono master modules contain identical features. One module is devoted to the Left and Right stereo mix and the other module is devoted to the Mono mix.
  • Page 60 ASSIGN SINGLE FOLLOW SCENE EDIT CHAN VCA ASN SELECT A – CHANNEL – TO ASSIGN L / R MONO SOLO SOLO p. 60 X-VCA owner’s manual panel MATRIX MATRIX SENDS SENDS – – • • – – • • –...

  • Page 61: Matrix Sends

    left / right & mono master modules matrix sends Due to space considerations, the Left Matrix sends are located on the Left / Right master module and the Right Matrix sends are located on the Mono master module. Likewise, the Mono Matrix sends are bumped down one slot and appear in the Master Control section.To make this more clear, refer to the illustration.
  • Page 62 SCENE EDIT CHAN VCA ASN SELECT A – CHANNEL – TO ASSIGN L / R MONO SOLO SOLO p. 62 X-VCA owner’s manual panel 1.2K 1.2K – + – + FREQ FREQ L / R MONO 40 HZ 40 HZ –...

  • Page 63: High-Pass Filter-Hpf

    / right & mono master modules Output EQ features Independent stereo and mono output EQ sections are provided on X-VCA.The EQ consists of 5 bands and a fixed High pass filter.The High and Low bands are shelving EQ and the High Mid, Mid and Low mid are full parametric. Although the left and right signals are processed separately, the paramaters are set in tandem by common front panel controls.
  • Page 64 SCENE EDIT CHAN VCA ASN SELECT A – CHANNEL – TO ASSIGN L / R MONO SOLO SOLO p. 64 X-VCA owner’s manual panel OUTPUT LIMITER OUTPUT LIMITER – – (DBU) (DBU) RATIO = 20 RATIO = 20 LIMIT LIMIT...

  • Page 65: Gain Reduction Metering

    left / right & mono master modules output limiter features The L/R and Mono outputs are equipped with independent output limiters. The limiters are located AFTER the console output faders and only affect the signals that appear at the main Left, Right and Mono XLR's. Limiting takes place according to the RMS level, allowing short term signal peaks to pass without attenuation.
  • Page 66 CHAN VCA ASN SELECT A – CHANNEL – TO ASSIGN L / R MONO SOLO SOLO p. 66 X-VCA owner’s manual panel L / R TO L / R MONO TALK TO TALK TO L / R MONO MONO CENTER...

  • Page 67: Output Features

    left / right & mono master modules output features sum L/R switch (Left / Right module) Combines the Left and Right outputs into summed mono outputs. This feature is useful when only mono operation is required, making the left and right output connectors available as separate line drivers for redundan- L/R to Mono switch (Mono module) Assigns the post fader left and right signals to the mono mix bus.
  • Page 68 CHAN VCA ASN SELECT A – CHANNEL – TO ASSIGN L / R MONO SOLO SOLO p. 68 X-VCA owner’s manual panel L / R TO L / R MONO TALK TO TALK TO L / R MONO MONO CENTER...
  • Page 69 left / right & mono master modules features 100mm Left, Right and Mono faders These faders control the overall Left, Right and Mono master output levels. Note that the Left, Right and Mono inserts are located prior to the faders and the lim- iters are located AFTER the faders.

  • Page 70: Master Control Section

    SEQUENCED SCENE EDIT EDIT PREVIEW SAFE SINGLE MICRO SCENE UTILITY SEQUENCE SCENE ON HEADPHONE AND TALKBACK JACKS LOCATED BELOW ARMREST p. 70 X-VCA owner’s manual panel SAFE SAFE PREVIEW PREVIEW MUTE MUTE OUTPUT OUTPUT – – • • TALK TALK...
  • Page 71 features The Master control section offers some flexible signal routing solutions as well as utilitarian functions.Also included is the Microprocessor section, which is described separately in it's own chapter.The master control section includes the following features: Matrix Output Control Matrix Send 1 though 4 External stereo program input with EQ Talkback input and control Alternate output and Monitor output control...
  • Page 72 SEQUENCED SCENE EDIT EDIT PREVIEW SAFE SINGLE MICRO SCENE UTILITY SEQUENCE SCENE ON HEADPHONE AND TALKBACK JACKS LOCATED BELOW ARMREST p. 72 X-VCA owner’s manual panel MATRIX MATRIX SENDS – SENDS – • • – – • • – –...

  • Page 73: Matrix Sends

    matrix sends The master control section contains two sets of Matrix sends.The first set is used to dial the Mono master signal into the four matrix busses.The second set is used to dial external signals into the four matrix busses. mono matrix 1–4 sends These level controls are used to dial the MONO signal into the correspond- ing matrix busses.
  • Page 74 EDIT EDIT PREVIEW SAFE SINGLE MICRO SCENE UTILITY SEQUENCE SCENE ON HEADPHONE AND TALKBACK JACKS LOCATED BELOW ARMREST p. 74 X-VCA owner’s manual panel TB M – – – L E V • HEADPHO MONO ASSIGN L - R EXTERNAL...
  • Page 75 external stereo program input The external stereo program input allows a line level stereo source to be fed into the console, eq'd and routed to the Left/Right and mono busses.The stereo source can also be monitored through the solo system.This section can be used for stereo returns or for stereo playback through the mains.
  • Page 76 POST MON PRE MON SOURCE SOURCE LEFT RIGHT LEFT RIGHT POST FADER PRE FADER SIGNAL SOURCES FROM L / R / MONO X-VCA owner’s manual panel STEREO PGM INPUT SOLO ALT OUT FROM L/R/M 1.2K PRE FDR – + TALK...
  • Page 77 alternate output features Additional outputs are available beyond matrix and headphone outputs. These outputs are derived from the left, right and mono mix outputs (see LCR to outputs switch).The outputs are available on the rear panel via male XLR connectors. LCR to outputs switch Adds the Mono/Center signal to all master section control outputs as a phantom center.
  • Page 78 RIGHT MONO MONITOR LEVEL SOLO SOLO LEFT - RIGHT SOLO AUDIO PRE MON SOURCE POST MON LEVEL SOURCE HEADPHONE X-VCA owner’s manual panel GM INPUT SOLO ALT OUT FROM L/R/M PRE FDR SOLO AUDIO TALK MONO ACK CTRL HEADPHONES CTRL...
  • Page 79 alternate output features Monitor out The Monitor out is very similar to the Alt out. Instead of assigning the Left and Right signals to the monitor out, they are always assigned.When the LCR to Outputs switch is depressed, the Mono master signal appears at the Monitor out- puts, as well (see above).The solo signal can also appear at the Monitor outputs (see below).
  • Page 80 SCENE EDIT EDIT PREVIEW SAFE SINGLE MICRO SCENE UTILITY SEQUENCE SCENE ON HEADPHONE AND TALKBACK JACKS LOCATED BELOW ARMREST p. 80 X-VCA owner’s manual panel GM INPUT SOLO ALT OUT MONITOR FROM L/R/M SOLO PRE FDR TALK TALK MONO MONO...
  • Page 81 talkback and solo features talkback control The talkback section provides the facilities to take either an external input signal, or an internally generated ping noise signal and route it to the consoles outputs.This is useful for making announcements from the mix position and for performing system diagnostics when other signal sources are not readily available.
  • Page 82 EDIT PREVIEW SAFE SINGLE MICRO SCENE UTILITY SEQUENCE SCENE ON HEADPHONE AND TALKBACK JACKS LOCATED BELOW ARMREST p. 82 X-VCA owner’s manual ACK CTRL HEADPHONES PRE FDR PINK NOISE POST FDR SOURCE ADDITIVE LAST PRESS MODE TO LATCH ) SOLO...
  • Page 83 The X-VCA provides a powerful stereo solo system. Any input or output can be monitored pre (PFL) or after level control (AFL), as desired. The system may be additive (all channels selected on solo bus), or exclusive, so that only one solo switch is active at a time ("last pressed").
  • Page 84 Send Return Return Return Mono Right Left Assist Out Alt R Out Alt L Out DC In MIDI X-VCA owner’s manual L / R PRE-FADER RIGHT POST RIGHT FADER LEVEL LEVEL LEVEL FREQ FREQ FREQ TO SOLO BUS & MICRO INTERFACE 3 - 0.7...

  • Page 85: Rear Panel Features

    The X-VCA offers a matrix expansion system. In additional to the four matrix outputs available withing the console, the individual matrix feeds can be brought out of the console and fed into an external matrix mixer, produced by Crest.This matrix mixer is the X-Matrix, a single rack space unit that provides two additional matrix mixes.
  • Page 86 TALK TO AUX S ASSIGN FEED CONTROL WITCHES X-VCA MASTER MODULE TALK TO L / R FEED LEFT ∑ ES AS L / R MIX AMPS LEVEL)- RIGHT RS / RCA ∑ CONTROL) HI-PASS FILTERS NDICATORS 40HZ@24DB/OCT...
  • Page 87 rear panel features Left, Right and Mono insert points Separate send and return 1/4" TRS jacks are provided for inserting external signal processors into the Left, Right and Mono outputs.The insert points are located after the Low pass filters and before the EQ sections. insert send This jack serves as an output which gets patched to the input of a sig- nal processor.

  • Page 88: Microprocessor Control

    HEADPHONE AND TALKBACK JACKS LOCATED BELOW ARMREST p. 88 SEQUENCED SCENE EDIT EDIT PREVIEW SAFE SINGLE MICRO SCENE UTILITY SEQUENCE SCENE ON X-VCA owner’s manual...
  • Page 89 microprocessor controlled muting The Crest X-Series of Consoles* is equipped with a micro-con- trolled Mute Controller which permits the user to set-up a series of Mute Scenes, each controlling any combination of channels and outputs.These Scenes can then be recalled, either singly or in combination, to allow the operator to easily control the mutes during a performance.
  • Page 90 X-VCA owner’s manual mute control panel typical input or output...
  • Page 91 Mute controller A)Up/Down Each press of these switches increments or decrements the Patch Display (B). Holding either button down will allow quickly scrolling up or down.The buttons are also used to select the parameters and settings of the system while in Utility mode. B)Display This 4-character alpha-numeric display normally shows the current Patch (1 through 128) being recalled.
  • Page 92 X-VCA owner’s manual mute control panel typical input or output p. 92...
  • Page 93 Mute controller I)Recall (Next) Each press of this switch increments the Sequenced Mutes by one, the dis- play (B) will reflect this. Also used to activate the displayed Scene when an Up/Down (A) button was used to scroll to a new Scene. In this case, an "*" will be displayed as the first character in the display to indicate that the dis- played number is not currently the active Scene.
  • Page 94 X-VCA owner’s manual mute control panel typical input or output p. 94...
  • Page 95 channel mute controls J)Status LED This bi-color LED, associated with each controlled Mute, shows the condi- tion of that mute. One of 5 possible states is possible: 1)Off- The channel is not controlled by the Mute Controller. 2)Steady Red- The channel is being muted by a Mute Scene. 3)Steady Green- The channel is in Safe Mode, can’t be muted by any Scene.
  • Page 96 X-VCA owner’s manual mute control panel typical input or output p. 96...
  • Page 97 mute scenes There are 9 possible Scene sources: Manual Mute Scenes 1 thru 8, and the Micro Scene.The Micro Scene button (G) is the enable switch for the 128 possible Sequenced Scenes.The 8 Manual Mutes are totally independent of the 128 Sequenced Scenes, giving the system a total of 136 possible mute patterns.
  • Page 98 X-VCA owner’s manual mute control panel typical input or output p. 98...
  • Page 99 copying a mute scene Copying a Mute Scene: Mute Scenes can be copied from a Sequenced Scene (Patch) to a Manual Mute Scene. Manual Mutes cannot be copied to Sequenced Scenes or to each other.To copy a Sequenced Scene into a Manual Mute Scene, follow the steps outlined below. 1) Press the Edit Preview button (C), it will begin to blink, indicating that the system is in Edit Preview Mode.
  • Page 100 X-VCA owner’s manual mute control panel typical input or output p. 100...
  • Page 101 The Safe Scene There may be occasions when a channel needs to be made "Safe" from all pro- grammed mutes.This may occur during a show when an on-stage microphone needs to be used as an announce mic, or a switch-over has to be made to a backup chan- nel due to some technical difficulty.The Safe Scene allows a channel to be removed from the control of all Mute Scenes without having to edit any of the scenes.
  • Page 102 X-VCA owner’s manual mute control panel typical input or output p. 102...

  • Page 103: Microprocessor Control

    Utilities The Mute Controller has a number of parameters that the user can change. A Utility Mode is provided for accessing these settings.The following is a current list of para- meters, along with their default and other possible settings.The default setting is shown UNDERLINED.
  • Page 104 X-VCA owner’s manual mute control panel typical input or output p. 104...
  • Page 105 Changing and reviewing the utility changes The Utility settings can be accessed by entering Utility Mode. Once there, the differ- ent parameters can be changed to suit user’s preferences.The changes stay in effect until they are again modified by the user, or a System Reset is performed (detailed later) which changes them all back to their default settings.

  • Page 106: Inputs And Outputs

    UNITY EDIT EDIT VCA 1 VCA 2 ASSIGN ASSIGN VCA 1 VCA 2 SOLO SOLO ASSIGN ASSIGN HEADPHONE AND TALKBACK JACKS LOCATED BELOW ARMREST X-VCA owner’s manual SEQUENCED SCENE EDIT EDIT PREVIEW SAFE SINGLE MICRO SCENE UTILITY SEQUENCE SCENE ON...

  • Page 107: Vca Facilities

    In addition to Mute scenes, the X-VCA Micro also controls the VCA assignment for each Channel. A Channel on an X-VCA refers to either an Input channel (up to 52 possible positions, depending on Console size), or an Audio Group (Total of 8).
  • Page 108 UNITY EDIT EDIT VCA 1 VCA 2 ASSIGN ASSIGN VCA 1 VCA 2 SOLO SOLO ASSIGN ASSIGN HEADPHONE AND TALKBACK JACKS LOCATED BELOW ARMREST X-VCA owner’s manual SEQUENCED SCENE EDIT EDIT PREVIEW SAFE SINGLE MICRO SCENE UTILITY SEQUENCE SCENE ON...
  • Page 109 VCA assigning - overview There are two methods available for assigning Channels to the 8 VCA Masters; the first method views the assignment from the Channel’s perspective, the second method looks at assignment from the VCA Master’s point of view.The word "Channel"...
  • Page 110 UNITY EDIT EDIT VCA 1 VCA 2 ASSIGN ASSIGN VCA 1 VCA 2 SOLO SOLO ASSIGN ASSIGN HEADPHONE AND TALKBACK JACKS LOCATED BELOW ARMREST X-VCA owner’s manual SEQUENCED SCENE EDIT EDIT PREVIEW SAFE SINGLE MICRO SCENE UTILITY SEQUENCE SCENE ON...
  • Page 111 VCA assigning - overview VCA Assignment- Scene-to-Scene changes: When operating the X-VCA in VFS Mode, up to 128 different VCA assignments are possible. Each Channel can be re-assigned to different VCA Masters with each Scene change.This can be most useful for theatrical per-...
  • Page 112 UNITY EDIT EDIT VCA 1 VCA 2 ASSIGN ASSIGN VCA 1 VCA 2 SOLO SOLO ASSIGN ASSIGN HEADPHONE AND TALKBACK JACKS LOCATED BELOW ARMREST X-VCA owner’s manual SEQUENCED SCENE EDIT EDIT PREVIEW SAFE SINGLE MICRO SCENE UTILITY SEQUENCE SCENE ON...
  • Page 113 For the 8 VCA Masters, the switch to select the Master for assignment is indicated by "VCA-#-SOLO", # represents a number 1 thru 8.There are two methods for doing VCA Assignment on the X-VCA. This first method assigns Channels to Masters: One of the Channels (any Input, or one of the 8 Audio Groups) is selected and its assignment to all of the 8 Masters can be viewed at a glance.
  • Page 114 UNITY EDIT EDIT VCA 1 VCA 2 ASSIGN ASSIGN VCA 1 VCA 2 SOLO SOLO ASSIGN ASSIGN HEADPHONE AND TALKBACK JACKS LOCATED BELOW ARMREST X-VCA owner’s manual SEQUENCED SCENE EDIT EDIT PREVIEW SAFE SINGLE MICRO SCENE UTILITY SEQUENCE SCENE ON...
  • Page 115 vca facilities VCA Safe Mode The user can choose to "SAFE" a Channel from ALL its VCA Assignments while in either VCA Edit Mode.This doesn’t actually change any of the assignments in memory, it only isolates the selected Channel from the effects of the assignment- only the Local Fader will have control over the Channel VCA once SAFED, the VCA Mute will also have no effect on the Channel.This is similar to the Mute Safe condition, where a Channel will...
  • Page 116 UNITY EDIT EDIT VCA 1 VCA 2 ASSIGN ASSIGN VCA 1 VCA 2 SOLO SOLO ASSIGN ASSIGN HEADPHONE AND TALKBACK JACKS LOCATED BELOW ARMREST X-VCA owner’s manual SEQUENCED SCENE EDIT EDIT PREVIEW SAFE SINGLE MICRO SCENE UTILITY SEQUENCE SCENE ON...
  • Page 117 VCA assignment 2 Detailed Operation There are two methods for doing VCA Assign on the X-VCA. Note: Front Panel Switches are indicted by BOLD-HYPHENATED-CAPITALIZED- TEXT. For the 8 VCA Masters, the switch to select the Master for editing is indicat- ed by "...
  • Page 118 UNITY EDIT EDIT VCA 1 VCA 2 ASSIGN ASSIGN VCA 1 VCA 2 SOLO SOLO ASSIGN ASSIGN HEADPHONE AND TALKBACK JACKS LOCATED BELOW ARMREST X-VCA owner’s manual SEQUENCED SCENE EDIT EDIT PREVIEW SAFE SINGLE MICRO SCENE UTILITY SEQUENCE SCENE ON...
  • Page 119 VCA copy It is possible to copy a VCA assignment from one Scene location to another. Copies can be made between Scene-0 and any Sequenced Scene, or a copy can be performed from a Sequenced Scene to Scene-0,or between two Sequenced Scenes.The Copy function is a one- shot only process, multiple Paste operations cannot be performed.A VCA Copy can only be performed while the Console is in Edit VCA Master Mode.Although you can only edit one Master at a time, the Copy function copies ALL VCA assignment data in that Scene, not just...
  • Page 120 UNITY EDIT EDIT VCA 1 VCA 2 ASSIGN ASSIGN VCA 1 VCA 2 SOLO SOLO ASSIGN ASSIGN HEADPHONE AND TALKBACK JACKS LOCATED BELOW ARMREST X-VCA owner’s manual SEQUENCED SCENE EDIT EDIT PREVIEW SAFE SINGLE MICRO SCENE UTILITY SEQUENCE SCENE ON...
  • Page 121 Instead of having to worry about which assignments need to be changed, the X-VCA per- mits the assignments to be cleared by using the Utility function of the Micro.Two separate clear functions are provided;...
  • Page 122 UNITY EDIT EDIT VCA 1 VCA 2 ASSIGN ASSIGN VCA 1 VCA 2 SOLO SOLO ASSIGN ASSIGN HEADPHONE AND TALKBACK JACKS LOCATED BELOW ARMREST X-VCA owner’s manual SEQUENCED SCENE EDIT EDIT PREVIEW SAFE SINGLE MICRO SCENE UTILITY SEQUENCE SCENE ON...
  • Page 123 ALL mute commands except for the Local Mute.With the X-VCA, this also includes the VCA Mute. 2. Channel has been "VCA Safed".With the X-VCA, it is possible to SAFE a Channel from its VCA assignment.This Safe will also prevent the Channel from responding to a VCA Mute, the Channel ignores not only the VCA assignment, but also any VCA Mutes.The...
  • Page 124 UNITY EDIT EDIT VCA 1 VCA 2 ASSIGN ASSIGN VCA 1 VCA 2 SOLO SOLO ASSIGN ASSIGN HEADPHONE AND TALKBACK JACKS LOCATED BELOW ARMREST X-VCA owner’s manual SEQUENCED SCENE EDIT EDIT PREVIEW SAFE SINGLE MICRO SCENE UTILITY SEQUENCE SCENE ON...
  • Page 125 VCA Master Solo/Assign switch Each of the 8 VCA Masters has its own SOLO switch.This switch has 2 functions-Solo and Assign: VCA Assign: When in Edit Chan VCA Mode, this switch is used to assign a Master VCA to a Channel for a particular Scene (Default Scene-0 or one of the 128 Sequenced Scenes).
  • Page 126 UNITY EDIT EDIT VCA 1 VCA 2 ASSIGN ASSIGN VCA 1 VCA 2 SOLO SOLO ASSIGN ASSIGN HEADPHONE AND TALKBACK JACKS LOCATED BELOW ARMREST X-VCA owner’s manual SEQUENCED SCENE EDIT EDIT PREVIEW SAFE SINGLE MICRO SCENE UTILITY SEQUENCE SCENE ON...
  • Page 127 VCA channel solo Solo operation of a Channel assigned to multiple VCA Groups: It is possible for a Channel to be assigned to more than one (up to 8 possible)VCA Masters. How it responds to multiple VCA Solos is now discussed. In Additive Mode, more than one signal can be solo’d.
  • Page 128 UNITY EDIT EDIT VCA 1 VCA 2 ASSIGN ASSIGN VCA 1 VCA 2 SOLO SOLO ASSIGN ASSIGN HEADPHONE AND TALKBACK JACKS LOCATED BELOW ARMREST X-VCA owner’s manual SEQUENCED SCENE EDIT EDIT PREVIEW SAFE SINGLE MICRO SCENE UTILITY SEQUENCE SCENE ON...

  • Page 129: Solo/Vca Edit Switch

    Solo - VCA edit switch Throughout the X-VCA console, Stereo Solo/VCA edit switches can be found on just about every input and output. The Solo - VCA edit switch has two functions: it can be used to activate or deactivate the channels solo feature, or it can be used to include or exclude the channel from one or more VCA groups.
  • Page 130 X-VCA owner’s manual p. 130...

  • Page 131: Dynamics Control

    X-VCA dynamics control Introduction The X-VCA includes a number of features for control of signal dynamics in both the Audio Group and Master sections. In many situations, these on-board features elimi- nate the need for outboard dynamics processors.This not only reduces costs and con- serves rack space, but also allows operators to keep their attention focused on the console at all times.
  • Page 132 X-VCA owner’s manual p. 132...
  • Page 133 dynamics control Group section: Compressor/Limiter functions The gate and compressor functions affect all signals summed into their respective Audio Group buses. Also, since the Audio Group external inputs are located pre-dynamics, the compressor/limiter and gate functions also can be used to control dynamics of an external sig- nal (e.g.
  • Page 134 X-VCA owner’s manual p. 134...
  • Page 135 (on drum kits in particular).Although the term "gate" is used here for the sake of simplicity, the X-VCA "gate" system actually functions as a downward expander. Where a traditional gate is either "on" or "off", a downward expander attenuates signal proportionally at descending levels below the threshold point.
  • Page 136 X-VCA owner’s manual p. 136...
  • Page 137 Stereo and Mono master faders.These limiters function with an RMS characteristic, and will therefore pass short term program peaks without attenuation or audible signal degradation. The X-VCA output limiters are best used for system protection, or to aid the operator in keeping within maximum sound levels as set by local noise ordinances.
  • Page 138 Matrix 3 Matrix 2 Matrix 1 Insert Insert Ext Mon In L Send Send Ext Mon Return Return Return In R Mono Right Left Assist Out Alt R Out Alt L Out MIDI X-VCA owner’s manual Insert Send DC In...

  • Page 139: Redundant Power Supplies

    power supply power supply usage console and power supply grounding Console chassis ground is electrically connected to: the audio ground, pin- 1 of XLR connectors, the sleeves of 1/4” sockets,and to the terminal at the rear of the power supply. SOLE GROUND The AC third-wire connection in the power supply cable connects the metal chassis of the power supply to safety ground.

  • Page 140: Specifications

    No changes needed 0.5 amps idle IEC 320 C-13 3-pin 15 amp receptacle removable IEC type with country-specific mains plug fitted UL, CSA, and CE two- space inch rack mount unit inches tall, inches wide, inches deep. weight: pounds X-VCA owner’s manual...

  • Page 141: Power Requirements

    power supply power supply usage supply identification The type of power supply can be identified by the model number shown on the back of the chassis and panel label. power requirements The X series power supplies have certain electrical requirements for prop- er operation.
  • Page 142 v. 1.1 01/25/01...

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