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Lexicon LDI 12T User Manual

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1 2 T S y s t e m U s e r G u i d e

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  • Page 1 1 2 T S y s t e m U s e r G u i d e...
  • Page 2 DO NOT OPEN DO NOT OPEN companying literature. sufficient to constitute a risk of shock. Lexicon Inc. 3 Oak Park Bedford MA 01730-1441 Telephone 781-280-0300 Copyright 1998, Lexicon Inc. Fax 781-280-0490 All Rights Reserved. www.lexicon.com Printed in the U.S.A. Lexicon Part #070-12131...
  • Page 3 1 2 T S y s t e m U s e r G u i d e...

  • Page 5: Table Of Contents

    Install Supported Third Party The Interface ..........29 Audio Software ........10 Inserting a Plug-In ........30 Install the ASIO Lexicon Studio Driver Routing an Audio Channel through for Windows 95 ........10 the PC-90 ..........30 Install the PC-90 Software for Windows 95 . 10 Selecting PC-90 and Making Settings ..
  • Page 6 5 Reference Reverb Level ..........48 PC-90 Algorithms ..........41 Reflect Delays ..........48 Reflect Levels ..........48 Ambience ............. 41 Shape, Spread ..........48 Chamber ............42 Size .............. 48 Concert Hall ..........43 Slope ............49 Inverse ............43 Spin ..............
  • Page 8 Lexicon Inc. 3 Oak Park Bedford MA 01730-1441 Telephone 781-280-0300 Fax 781-280-0490 www.lexicon.com Lexicon Part # 070-12131...

  • Page 9: Getting Started

    Getting Started Introduction Thank you for your purchase of a Lexicon Studio system. Lexicon Studio provides a line of professional hardware components for computers that provides uncompromised audio quality and extensive processing capability. This family of products is designed to allow you to tailor your working environment to your needs.

  • Page 10: Versions Of Windows

    Getting Started Lexicon Versions of Windows Lexicon Studio requires Windows 95 A or B. Studio is not compatible with Windows 95 V0. To determine the version of Windows you are running, follow these steps: 1. In the Control Panel, double-click System.

  • Page 11: Scsi Vs. Ide

    Lexicon Studio 12T System User Guide Getting Started SCSI Vs. IDE Both SCSI and IDE offer distinct advantages: Benefits Liabilities SCSI fast bus performance, Use of a PCI card to removable media interface to the computer lots of choices of high...
  • Page 12 Getting Started Lexicon...

  • Page 13: Installation

    Lexicon Studio 12T System User Guide Installation Installation Depending on your computer, installation of your Lexicon Studio system should take about 20 minutes. Please read through the entire procedure before performing the installation. Precautions • Turn off and unplug your computer.

  • Page 14: Hardware Installation

    1. Put on the anti-static wrist strap. 2. Place the foam from your Lexicon Studio package on top of a work surface next to your computer. (Any flat piece of static-safe foam with similar dimensions to the Core-32 card can be used).

  • Page 15: Attach The Pci Extender

    Lexicon Studio 12T System User Guide Installation 5. Once the cards are mated, place the assembly, with the Core-32 card on top, onto the Core-32 anti-static bag. Use the four screws provided to attach the PC-90 to the Core-32 card. Do not overtighten the screws as you may damage the PC board.

  • Page 16: Install The Core-32/Pc-90 Assemby

    Installation Lexicon Install the Core-32/PC-90 assembly The Core-32 System card must be installed in a full-size PCI slot which is a bus master. Refer to your computer owner’s manual to determine which slots are available as bus masters. (On some older motherboards, the PCI slot next to the ISA bus connector [the PCI/ISA shared slot] is not a PCI bus master slot.)

  • Page 17: Connect The Ldi-12T Interface To Audio Sources

    Connect the LDI-12T Interface to Audio Sources Cables/Connections 1. Use only the proprietary Lexicon cable (provided) to connect the Core-32 card to the LDI-12T Interface. 2. With both the computer and the LDI-12T powered down, attach the cable between the lower connector on the back of the Core-32 card and the Computer port on the LDI-12T rear panel.

  • Page 18: Software Installation

    Windows 95 will identify a new PCI multimedia device (In the event of booting problems, refer to the troubleshooting section of this manual). 2. Insert Disk 1: Lexicon Studio Drivers. Windows 95 will search the floppy drive for the .inf file. Once this is found, click Finish.

  • Page 19: Install The Pc-90 Software For Windows 95

    PC-90 install by using the Add/Remove Programs control panel, highlighting PC-90 Install, and selecting Remove. This control panel is located at Start/Settings/Control Panel/Add/Remove Programs. System Connections The Lexicon Studio 12T system has the following signal connections. Front Panel Connections POWER S/PDIF...

  • Page 20: Rear Panel Connections

    Once your system is physically configured, signal routing is controlled by the Lexicon Studio Driver and the routing provided by your host application program (Cubase VST, for example). Use of the Lexicon Studio Driver and examples of...
  • Page 21 Lexicon Studio 12T System User Guide Installation The configuration shown below has the analog outputs connected to speakers for monitoring, S/PDIF to a DAT for mixing, and ADAT connections for multi-channel recording. The XLR analog inputs could be from a mixer or microphone/instrument pre-amp, or the RCA inputs could be used for low-level devices such as a CD player or cassette deck.
  • Page 22 Installation Lexicon Optical S/PDIF connections are provided as an alternative to the normal 8-channel ADAT format. LDI-12T Rear ADAT ADAT or S/PDIF WORD CLOCK IN AUDIO SYNC IN SYNC OUT RS-422 POWER COMPUTER S/PDIF Optical I/O Connection DAT Player The LDI-12T can accept different input and output formats as shown below. This configuration can be used for format conversion from optical S/PDIF to coaxial (RCA) S/PDIF and to provide flexible routing.

  • Page 23: Core-32 Basics

    Lexicon Studio 12T System User Guide Core-32 Basics Core-32 Basics Signal Routing Using Cubase VST as an example of a host application, the following things determine signal routing. 1. LDI-12T connections. 2. Configuration of the Core-32 Control Panel. 3. Inputs and outputs selected and enabled in Cubase Audio VST.

  • Page 24: Core-32 Control Panel

    Lexicon Core-32 Control Panel Several features of your Lexicon Studio System are set up for the specific program you are using in the Core-32 Control Panel. To access the Control Panel, pull down the Audio Menu, select System and click on the ASIO Control Panel button.

  • Page 25: Ctrl I/O

    Lexicon Studio 12T System User Guide Core-32 Basics Ctrl I/O Items on the Ctrl I/O tab control Input/output converter gain, Digital I/O format, Digital emphasis/de- emphasis and SCMS (Serial Copy Management System) copy protection code Gain Levels are controlled by the on screen faders with the gain displayed numerically at the bottom.
  • Page 26 Core-32 Basics Lexicon Clicking the button between fader pairs links them as a stereo pair for convenient identical gain setting. Control clicking on the Link button will link the fader heads to one another while maintaining their relative levels. Clicking with the mouse on the fader head while holding down the ctrl key on the computer keyboard will set the selected fader or stereo grouped fader to 0dB.

  • Page 27: Reverb

    Lexicon Studio 12T System User Guide Core-32 Basics Reverb The reverb page allows you to route the PC-90’s two DSP engines independently through any of the connectors of your audio interface.
  • Page 28 Core-32 Basics Lexicon Each PC-90 engine has two input sources (left and right), and two output destinations (left and right). To assign a source to any of the input channels in your PC-90: 1. Click the left mouse button on the down-arrow of an input selector. A menu will open, displaying the sources available to route into your PC-90.
  • Page 29 Lexicon Studio 12T System User Guide Core-32 Basics Destination Description <Clear All> Clears all destination assignments VST_Analog_In L & R Sends the PC-90 out to the analog in on the VST Input page VST_SPDIF_In L & R Sends the PC-90 out to the S/PDIF in on the VST Input page...

  • Page 30: Punch Record

    This page lets you select Input sources for Punch or overdub recording and Output monitor selections for the sources selected for Punch or overdub recording. The Punch feature lets you perform overdub or punch recording by directly connecting to a Lexicon Studio interface — No external mixer is required.

  • Page 31: The Mix Level Control

    Lexicon Studio 12T System User Guide Core-32 Basics 4. Select Global Disable from the System Setup dialog to turn off the monitoring through the application so that a delay is not heard from the input signal. The MIX Level Control Mix Level allows you to adjust the volume of the selected Punch sources that are mixed with the VST output assigned to the same outputs (Usually Master).

  • Page 32: Timecode And Synchronization

    Core-32 Basics Lexicon Timecode and synchronization On this tab you can enable Timecode reading, select the Timecode source and display the Timecode type, validity and number. As these controls are independent of the host application, they can help you set up your software for proper frame rate and start time.

  • Page 33: Setting Up Cubase To Sync To Timecode

    Lexicon Studio 12T System User Guide Core-32 Basics Setting Up Cubase to Sync to Timecode The LDI-12T uses a MIDI driver to convert the Longitudinal Timecode (LTC) supplied by the front panel XLR to MIDI Timecode (MTC). 1. In the Options menu, select Synchronization and set Timecode Base to MIDI Timecode.

  • Page 34: Sample Rates

    Sample rates Sample rates of 44.1 and 48 kHz are selected from the Audio I/O pull down menu. Word clock The word clock sources available on your Lexicon Studio interface (Audio Clock Source) are also selected from the Audio I/O menu.

  • Page 35: Word Clock Sources

    Lexicon Studio 12T System User Guide Core-32 Basics Word Clock Sources INTERNAL Selects the word clock generated by Cubase as the system master. ADATSYNC 12T Selects the word clock provided on the ADAT Sync connector as the system clock. ADATDATA 12T Selects the word clock provided on the ADAT optical data connector as the system clock.
  • Page 36 Core-32 Basics Lexicon...

  • Page 37: Using The

    Using the PC-90 Basic Operation The PC-90 combines the quality and power of Lexicon reverb on dedicated hardware with the ease and elegance of a software plug-in interface. Unlike software-based plug-ins, PC-90 provides outstanding sonic quality with no burden on the system performance of your computer’s processor.

  • Page 38: Inserting A Plug-In

    Using the PC-90 Lexicon Inserting a Plug-in The interface for the PC-90 is available as a plug-in. Plug-ins are accessed differently in different software applications. To open a PC-90 plug-in in Cubase VST, you need to follow these steps: Routing an Audio Channel through the PC-90 1.

  • Page 39: Selecting Pc-90 And Making Settings

    Lexicon Studio T System User Guide Using the PC-90 6. Click On for each effect send you want to activate and turn the corresponding Send Level knob to a moderate value. 7. If you want the signal to be sent to the effects before the faders, click on the Pre button for the send.
  • Page 40 PC-90. Most notably, the Input Level and Bus Select Button are not operational on the PC-90. PC-90 Input Level is controlled by the Aux Send knob in the channels monitor section. PC-90 bus selection is performed on the Reverb page of the Lexicon Studio control panel.

  • Page 41: Naming Effects

    Lexicon Studio T System User Guide Using the PC-90 Naming Effects 1. Click on the Program name in the top center of the effect processor display to open a name dialog. 2. Type in a new name. 3. Press [Return].

  • Page 42: Loading Effects

    Using the PC-90 Lexicon Loading Effects Load effects from disk into the PC-90 as follows: 1. Pull down the File menu. 2. To load a single Program, select Load Effect. 3. To load a complete Program Bank, select Load Bank.

  • Page 43: Beyond The Basics

    Routing a Plug-In A Default routing is set in your Lexicon Studio system, to allow you to use your PC-90 as an auxiliary effect, monitoring the audio through the analog outputs on your audio interface as soon as it is Installed.
  • Page 44 Using the PC-90 Lexicon The Reverb page on the Core-32 Control Panel allows you to route the two PC-90 DSP engines independently through any of the connectors of your audio interface. For each PC-90 engine, there are two input sources (left and right), and two output destinations (left and right). To assign a source to any of the input channels in your PC-90: 1.
  • Page 45 Lexicon Studio T System User Guide Using the PC-90 The diagram below is a flow chart of the audio routing from the previous picture of the control panel. Notice that PC-90 receives its input from Cubase VST via the VST_Aux_Send_1L and VST_Aux_Send_1R sources.
  • Page 46 Using the PC-90 Lexicon The reverb routing matrix is flexible, and can provide a wide array of configurations. The above configuration would not be ideal if, for example, you were mixing audio simultaneously from a digital tape deck and your computer to a digital mixer, and wanted to send your reverb into your digital mixer on independent channels.

  • Page 47: Automating The Pc-90

    Lexicon Studio T System User Guide Using the PC-90 Automating the PC-90 The PC-90 Digital Reverberator can be completely automated within any control software that supports automation. Refer to the user guide for your particular software package for support offered for this functionality.
  • Page 48 Using the PC-90 Lexicon To playback automation in your mix: 1. Check that the Audiomix Track or Part are not muted. 2. Activate Automated playback by clicking on the Read button in the upper left corner of the Monitor window.

  • Page 49: Reference

    Lexicon Studio 12T System User Guide Reference Reference PC-90 Algorithms Ambience InLvl ReverbLvl Size Link DTime Pre Delay Diffusion DLevel Rt HC Unlike traditional reverb, Ambience is intended to become a part of the direct sound – to give it both better blend and a definite position in space.

  • Page 50: Chamber

    Reference Lexicon This allows a soloist to be increased in level without changing the apparent distance. Ambience can be used in a recording situation any time a close-miked sound is undesirable. When using Ambience in a mix, it is best to use a stereo send to the PC-90, carefully matching the panning of the various close-miked sources to their positions in the mix.

  • Page 51: Concert Hall

    Lexicon Studio 12T System User Guide Reference Concert Hall BassMult Mid Rt Crossover Rt Hc InLvl ReverbLvl Size Shape Spread Pre Delay Chorus Depth Spin Link Diffusion This algorithm emulates a real concert hall. The reverberation is very clean, and designed to remain behind the direct sound –...

  • Page 52: Room

    Reference Lexicon Room EchoFbkL EchoDlyL BassMult Mid Rt Crossover ReverbLvl InputLvl TrebleDcy Size Shape Pre Delay Diffusion HFRolloff Spin Spread Link Infinite Range Rate EchoDlyR EchoFbkR Room produces an excellent simulation of a very small room which is useful for dialog and voice-over applications, but which may be too colored for some sustained musical tones.

  • Page 53: The Parameters

    Lexicon Studio 12T System User Guide Reference The Parameters The PC-90 has a wide range of parameters to control the sound of your algorithms. Not all parameters are found in all algorithms. Chorus In the Concert Hall algorithm, Chorus randomizes delay times and introduces modulation to make reverberation sound less metallic.

  • Page 54: Diffusion

    Reference Lexicon Depth In the Concert Hall algorithm, Depth sets the output amplitude envelope, changing the listener’s perspective from the front to the rear of the hall. Diffusion A Diffusion control is provided in all algorithms. It controls the degree to which initial echo density increases over time.

  • Page 55: Infinite

    Lexicon Studio 12T System User Guide Reference Infinite In the Room algorithm, this control is provided to turn the Infinite effect On or Off. Input Lvl InLvl controls the level of the unprocessed (dry) signal into the effect. Link When Link is set to On, the reverb time (Mid RT) and Spread scale linearly as the Size control is varies.

  • Page 56: Reverb Level

    Reference Lexicon Reverb Level Reverb Level sets the amount of reverberation in the processed signal. It is normally FULL, but may be reduced for effects where the pre-echoes should dominate. Reflect Delays In the Chamber and Inverse algorithms, L Refl and R Refl provide pre-echoes to the left and right channels.

  • Page 57: Slope

    Lexicon Studio 12T System User Guide Reference Slope In the Inverse algorithm, Slope determines the shape of the reverb envelope. When set to 0, the level of reverb remains unchanged over its duration, then cuts off abruptly (depending upon the amount of Diffusion in use).

  • Page 58: Preset Descriptions

    Reference Lexicon Preset Descriptions Notes on Preset Design PC-90 incorporates the results of a great deal of research into acoustics and reverberation. Reverberation, or reflected sound energy, gives recorded music a sense of being performed in a real acoustic location.
  • Page 59 Lexicon Studio 12T System User Guide Reference As Shape is raised further, the buildup and sustain remain similar, but now a secondary sustain appears in the envelope, at a lower level than the first. This secondary plateau simulates a very diffused reflection off the back wall of a hall, and is effective in creating a sense of size and space.
  • Page 60 Reference Lexicon Next use Mid Rt to fine-tune the amount of time the reverberation takes to die away at the end of musical phrases. Actual halls vary a great deal in their Mid Rt values. The setting of Bass Mult is also critical in matching the sound of an existing hall.

  • Page 61: Appendix A Third Party Support

    Lexicon Studio 12T System User Guide Appendix A Appendix A Third Party Support This section provides user notes and excerpts from user guides from supported third party applications. Documented below are several important features for Steinberg Cubase VST, such as automation.
  • Page 62 Monitor window fader to -0.4 dB, the resulting volume will be -2.4 dB. l Please note that the Monitor Mixer automation is not restricted to Volume and Pan - Mutes, Solo, EQ and Effect settings can also be automated, as with the Lexicon PC-90.
  • Page 63 Lexicon Studio 12T System User Guide Appendix A Automating the Monitor mixer Your actions in the Monitor mixer window can be automated in a very straightforward way: by “writing” them into a special Audiomix Part. When played back, this Part will repeat your fader movements and button presses just like you performed them.
  • Page 64 The PC-90 has been enabled for complete automation. As Steinberg Cubase VST provides automation for only the first 16 parameters of a channel effect, and the first 8 parameters for a master effect. Lexicon has prioritized the PC-90 parameters to take the fullest advantage of this feature. Recording your actions 1.
  • Page 65 Lexicon Studio 12T System User Guide Appendix A 7. Deactivate the Write function by clicking on the button. 8. Exiting the Monitor window will automatically deactivate the Write function. Recording Mixer settings in Stop mode The Write function works in Stop mode as well as during playback. If you activate Write when Cubase VST is stopped, all changes you make to your mixer parameters are recorded at the current Song Position.
  • Page 66 Appendix A Lexicon Moving and Muting the Audiomix Part The Audiomix Part can be handled as any Mixer Part: • If you want to turn off Monitor mixer automation from the Arrange window, you can mute the Audiomix Part or Track.
  • Page 67 Lexicon Studio 12T System User Guide Appendix A Editing the Audiomix Part The Audiomix Part contains Mixer Events, which can be edited in List Edit: 1. Select the Audiomix Part in the Arrange Window. 2. Open List Edit. 3. Pull the divider to the right so that you can see the Comment column.
  • Page 68 Appendix A Lexicon How List values work for Switches The text in the Comments column corresponds to the numerical value in the Value 1 column. Each continuous parameter (such as volume, pan, etc.) on each audio channel , has a unique Event number (value 1), while the Value 2 column shows the parameter values.

  • Page 69: Appendix B Troubleshooting

    Lexicon Studio 12T System User Guide Appendix B Appendix B Troubleshooting Installation troubleshooting Problems Starting Autodetection If there was a card installed in your system previous to this installation you should run uninstall to remove all the components that may be in your system. Uninstall will reset your system to the state that it was in before the Core-32 card was installed.

  • Page 70: Pc Troubleshooting

    Appendix B Lexicon • Reconfigure a legacy device to make room for the new device Use the Hardware Conflict Troubleshooter in Windows Help. The Troubleshooting Wizard walks you through step-by-step troubleshooting or will suggest solutions to fix the problem. Tip: If you have a motherboard with five (5) PCI slots you may find that 2 of the slots share one IRQ.
  • Page 71 Lexicon Studio 12T System User Guide Appendix B VGA Cards Screen redraws may create pops, clicks or crashes. Many times, this can be either the bus being locked, or the CPU being interrupted too often to maintain a reliable stream of audio. Certain VGA cards appear to be the cause of this problem.

  • Page 72: Optimizing Windows 95 For Audio Applications

    Appendix B Lexicon Optimizing Windows 95 for Audio Applications Following are some suggestions that may improve your computers performance as a dedicated Digital Audio Workstation. Some of these suggestions disable some Windows 95 optimization features and may slow the overall performance of your system when using non-audio applications.
  • Page 73 Lexicon Studio 12T System User Guide Appendix B Graphics Hardware Acceleration In non-AGP computer systems (computers using VGA cards), graphics acceleration settings can force your video card to hog the PCI bus. Crackling and zippering in the audio while opening and moving windows is a warning sign of this.
  • Page 74 Appendix B Lexicon Read-Ahead Optimization If you find that you are getting noise when adding more tracks of hard disk audio, try this to optimize your system and increase the number of tracks within your system. This control panel can be found by opening Start/Settings/ Control Panel/System, then selecting the Performance tab and clicking the File System button.

  • Page 75: Common Problems And Solutions

    Appendix B Common Problems and Solutions The Lexicon Studio Sound System is not recognized by Windows 95 when first installed. Make sure you have a Plug and Play ready BIOS that complies with V2.1 of the PCI specification. Load the default values of the BIOS and try installing the card again.

  • Page 76: Poor System Performance

    Use a fast IDE drive for your audio. Getting audio off the PCI bus creates more bandwidth for the Lexicon Studio System. You might also try a fast SCSI drive with a PCI SCSI controller, which will yield performance almost as high as the IDE due to the faster speed of SCSI.

  • Page 77: Appendix C Specifications

    Lexicon Studio 12T System User Guide Appendix C Appendix C Specifications LDI-12T Interface Audio Inputs (2) Connectors: Balanced: female XLR-3 type Unbalanced: RCA type (software selectable) Impedance: 100k , balanced; 50k , unbalanced Levels: -14 to +18dBu full-scale, balanced -20 to +12dBu full-scale, unbalanced...
  • Page 78 Appendix C Lexicon Digital Audio Interface Input Connectors: Coaxial RCA type (1) Optical TOSLINK (1), assignable as S/PDIF or TOSLINK Output Connectors: Coaxial RCA type (1) Optical TOSLINK (1), assignable as S/PDIF or TOSLINK Format: S/PDIF (IEC-958, CP-340) consumer audio interface System Sample Rates 44.1kHz, 48kHz...
  • Page 79 Lexicon Studio 12T System User Guide Appendix C Core-32 External Interfaces: LDI-12T proprietary multi-pin connector LDI-16S proprietary multi-pin connector Internal Interfaces: PCI Interface PC-90 daughterboard interface TBUS daughterboard interface Data Resolution: 24-bit architecture Power Requirements: +5v 5% Clock Range: 44.1 kHz -5% to 48 kHz +5%...
  • Page 80 Appendix C Lexicon...

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