Symetrix 628 User Manual
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Symetrix 628 User Manual

Digital voice processor
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628 Digital Voice Processor

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Summary of Contents for Symetrix 628

  • Page 1 628 Digital Voice Processor...
  • Page 2 Table of Contents 14926 35th Ave. West Lynnwood, WA 98037 USA Tel (425) 787-3222 Fax (425) 787-3211 Email: symetrix@symetrixaudio.com...

  • Page 3: Front Panel

    S/P DIF UNBALANCED UNBALANCED 15 WATTS AES/EBU 13 14 48kHz MAXIMUM 44.1kHz 32kHz FABRIQUÉ AUX E.-U. PAR SYMETRIX INC., LYNNWOOD, WASHINGTON. RÉFÉREZ TOUTE RÉPARATION À UN TECHNICIEN QUALIFIÉ. MIDI OUT/THRU MIDI/RC-1 IN AES/EBU S/P DIF ANALOG RIGHT ANALOG LEFT LINE MICROPHONE...
  • Page 4 Operator Safety Summary Chapter 2 Equipment Markings CAUTION RISK OF ELECTRIC SHOCK DO NOT OPEN TO REDUCE THE RISK OF FIRE OR WARNING: ELECTRIC SHOCK DO NOT EXPOSE THIS EQUIPMENT TO RAIN OR MOISTURE RISQUE DE CHOC ELECTRIQUE AVIS: NE PAS OUVRIR SEE OWNERS MANUAL.

  • Page 5: Phantom Power

    DIGITAL VOICE PROCESSOR MANUFACTURED IN LYNNWOOD, WA, USA AC INPUT 15 WATTS MAXIMUM LISTED FABRIQUÉ AUX E.-U. PAR SYMETRIX INC., LYNNWOOD, WASHINGTON. 813 COMMERCIAL RÉFÉREZ TOUTE RÉPARATION À UN TECHNICIEN QUALIFIÉ. AUDIO EQUIP. 2T38 Connecting with your microphone ... INPUT PHANTOM...
  • Page 6 Connecting to a line level audio source ... You can’t have it both ways ... PRE-AMP LINE CLIP PHANTOM Too hot? GAIN -15 PAD (dB) NORM...
  • Page 7 Gain adjustment ... Where’s the VU meter?
  • Page 8 Under normal circumstances ... PUTS UNBALANCED UNBALANCED ANALOG LEFT ANALOG RIGHT But, I need a mic level output ... And, I want the digital output ... OUTPU DIGITAL OUTPUT SAMPLE SELECT RATE SELECT S/P DIF AES/EBU 48kHz 44.1kHz 32kHz AES/EBU S/P DIF...
  • Page 9 Remote control & MIDI ... REMOTE CONTROL DIGITAL VOICE PROCESSOR MIDI MIDI OOD, WA, USA PROGRAM CHANNEL DUMP SELECT LISTED OMMERCIAL MIDI/RC-1 IN MIDI OUT/THRU O EQUIP. 2T38 SELECT CHANNEL 1 MIDI OUT POWER IN FROM SYMETRIX 628 TS D.C. LARITY RING -...
  • Page 10 Copying programs between units with MIDI ... Preset selection ... MASTER 28 24 CLIP HEADROOM (dB) LOAD SAVE OUTPUT PRESET LEVEL NUMBER Moving a preset program ...
  • Page 11 The Equalizer ... PARAMETRIC EQ HIGH (20-500Hz) (160-6300Hz) (680-20kHZ) ACTIVE FREQUENCY BANDWIDTH CUT/BOOST (kHz) (Oct) (dB)
  • Page 12 An example ... The Compressor ...
  • Page 13 COMPRESSOR ACTIVE THRESHOLD RATIO RELEASE (dBFS) (X:1) (Sec)
  • Page 14 The Expander/Gate ... EXPANDER/GATE -18 -15 ACTIVE THRESHOLD RATIO RELEASE (dBFS) (X:1) (Sec)

  • Page 15: Front Panel Security

    The De-Esser ... DE-ESSER -15 -12 ACTIVE FREQUENCY THRESHOLD (kHz) (dBu) That’s it ... Front Panel Security Other remaining mysteries ...

  • Page 16: Audio Processing Basics

    Audio Processing Basics Chapter 4 Dynamic Range Processing Defining Dynamic Range Dynamic Range as a Specification...
  • Page 17 Dynamic Range of Sound Why Audio Compressors are Our Friends Compressors are to Limiters as Downward Expanders are to Gates The Threshold Concept Attack and Release Timing...
  • Page 18 Linear vs. Downward Expanders...
  • Page 19 How Expanders Increase Usable Dynamic Range De-essers Equalization...
  • Page 20 Using the Parametric Equalizer Beware of Distortion and Noise Know What You Are Listening To Use Wide Peaks, Narrow Dips Tuning the EQ/Notch Filter...
  • Page 21 Equalizing for Speech...

  • Page 22: Solutions To Possible Problems

    Solutions to Possible Problems Chapter 5 No analog output signal. No digital output signal. Hum or buzz in the audio. Distorted audio.
  • Page 23 Noise in the form of hiss. No processing action. The SAVE button does not operate. I cannot save changes to a preset. The MASTER display shows a value outside of the normal operating limits.
  • Page 24 The 628 is locked-up. The Re-initialization Procedure, or everything I know is wrong ...

  • Page 25: Repair And Warranty Information

    Chapter 6 Repair and Warranty Information Return Authorization In-Warranty Repairs Out-of-Warranty Repairs...

  • Page 26: Symetrix Limited Warranty

    Symetrix Limited Warranty Chapter 7 Limitation of Liability...

  • Page 27: Specifications

    Chapter 8 Specifications Inputs Analog Output Controls and Switches: Gain, 15 dB Pad, Phantom Power, Type: Balanced Transformerless Mic/Line Output Level at 0dBFS: +22 dBu Balanced, Jumperable Input Connector: Microphone - Female XLR, to +16dBu or -20dBu for mic level input Line - Female XLR &...
  • Page 28 Architect's and Engineering Specifications Chapter 9...
  • Page 29 Appendix A Symetrix 628 Factory Presets...

  • Page 30: Symetrix 628 Preset Worksheet

    Symetrix 628 Preset Worksheet Appendix B Name Preset# Name Preset# De-Esser De-Esser Frequency: Frequency: Threshold: dBFS Threshold: dBFS Expander/Gate Expander/Gate Threshold: dBFS Threshold: dBFS Ratio: Ratio: Release: Sec. Release: Sec. Compressor Compressor Threshold: dBFS Threshold: dBFS Ratio: Ratio: Release: Sec.

  • Page 31: Output Level Conversion

    Appendix C Output Level Conversion Converting an Analog XLR Output to Microphone Level: Here’s the procedure: Changing the Maximum Analog Output Operating Level Jumper positions for +22dBu R31 C34 maximum output. BP23 BP28 BP17 BP29 BP14 BP33 BP26 BP24 C51 BP18 BP30 R46 U14...

  • Page 32: Jumper Positions

    Jumper positions for +16dBu R31 C34 maximum output. BP23 BP28 BP17 BP29 BP14 BP33 BP26 BP24 C51 BP18 BP30 R46 U14 BP20 BP22 BP31 Jumper positions for -20dBu R31 C34 maximum output. BP23 BP28 BP17 BP29 BP14 BP33 BP26 BP24 C51 BP18 BP30 R46 U14...
  • Page 33 Appendix D RC-1 Remote Control The Symetrix RC-1 MIDI Remote Control PROGRAM 1 PROGRAM 5 PROGRAM 9 PROGRAM 2 PROGRAM 6 PROGRAM 10 PROGRAM 3 PROGRAM 7 PROGRAM 11 PROGRAM 4 PROGRAM 8 BYPASS (PROGRAM 0) What’s my name?

  • Page 34: Optional External Power Supply

    Installation ... MIDI OUT POWER IN FROM SYMETRIX 628 OPTIONAL EXTERNAL 9 VOLTS D.C. MANUFACTURED IN THE USA BY POWER SUPPLY. D.C. POLARITY (NOT NEEDED WHEN USED WITH TIP + RING - SYMETRIX 628) LYNNWOOD, WA NO USER SERVICEABLE PARTS INSIDE.

  • Page 35: Troubleshooting

    Testing 1, 2, 3 ... Need a longer cable? Troubleshooting...

  • Page 36: Input/Output Connections

    (-) = UNUSED (-) = NOT USED = GROUND = GROUND FROM ELECTRONIC, NON-TRANSFORMER TO UNBALANCED IN FROM BALANCED OUTPUT (TYPICAL OF SYMETRIX PRODUCTS) TRANSFORMER COUPLED OR TO UNBALANCED INPUTS FLOATING BALANCED OUTPUT FEMALE XLR MALE TS PLUG PIN 1 = GROUND + LOW...

  • Page 37: Appendix F Declaration Of Conformity

    Appendix F Declaration of Conformity 628 Digital Voice Processor EN 60065 Safety requirements for mains operated electronic and related apparatus for household and similar general use. EN 50081-1 Electromagnetic compatibility - Generic emission standard Part 1: Residential, commercial, and light industry.

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