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Summary of Contents for DigiTech VCS1
- Page 2 EN 60065 EMC: EN 55022 (1987): IEC 65 (1993) CISPR 22 (1993) Class B European Contact: Your local DigiTech Sales and Service Office or Amendment 1 (1987) EN 50082-1 (1992) International Sales Office Amendment 2 (1989) 3 Overlook Drive Unit #4...
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Page 3: Table Of Contents
Gate Threshold & Attenuation..........6 De-ess Control ..............6 Peak Limiter.................7 Compressor Controls ............7 Meter Function Switch ............8 Auto Switch .................8 Knee Switch.................8 Process Switch ..............8 Stereo Link Switch ..............8 Application Notes ..............9 Specifications..............13 Signal Flow Diagram............15 DigiTech VCS-1 Owners Manual version 1.01 rev. 12/16/96... -
Page 4: Introduction
Introduction Thank you and congratulations on your purchase of the Digitech VCS-1. This product was devel- oped to give you precise control over dynamics in digital recording, analog recording and live per- formance. The VCS-1 also has an adjustable-gain vacuum tube stage with analog VU metering and LED peak indication. -
Page 5: Connection Examples
Connection Examples The following diagrams show a few ways in which the VCS-1 can be used. ••• •••... -
Page 6: Rear Panel
REAR PANEL WIRING SCHEME All of the XLR input and output connectors are pin 2 hot, meaning that pin 2 carries the positive side of the balanced signal. Pin 3 is cold, carrying the negative polarity and pin 1 is the shield. The 1/4”... -
Page 7: Line Output
LINE OUTPUT This output is servo-balanced producing +4 nominal level to XLR and 1/4” TRS connectors. Unbalanced cables may be used also. ••• •••... -
Page 8: Front Panel
Front Panel OUTPUT CONTROL This center-detented knob controls the output level. The center detent indicates unity gain. Provided, the Tube Gain control is in the center detent position as well. The output level can be adjusted to provide make-up gain when the compressor is active, or reduce the output level fed to a device that will only accept -10 dBV signals. -
Page 9: Trim Adjustment
• Line input level: PROCESS switch set to Bypass, METER switched to Output • Line output level: PROCESS switch set to Active, METER switch set to Output • Compressor gain reduction: PROCESS switch set to Active or Bypass, METER switch set to G.R. •... -
Page 10: Peak Limiter
PEAK LIMITER THRESHOLD The Peak Limiter puts an instantaneous “ceiling” on the transient peak levels of your audio material without affecting dynamics below the threshold. This feature is essential for digital recording and speaker protection for live sound. In the furthest clockwise position, the limiter is off. Turning the control counter-clockwise engages the peak limiter. -
Page 11: Meter Function Switch
METER FUNCTION This switch allows you to toggle the VU meter display between monitoring input level, output level or gain reduction. In the G.R. (gain reduction) setting, the meter needle will center on the 0VU por- tion of the legend and swing to the left indicating how much attenuation is occurring due to the compressor or peak limiter. -
Page 12: Application Notes
APPLICATION NOTES Compression Vocals: Unless the vocalist you are recording has exceptional microphone control, some compression is always welcome on a vocal track. A generally accepted practice, is to use a light compression ratio of 2:1 or so when first recording the vocal to tape then, later to increase the ratio amount depending on the density of the mix. - Page 13 Set the Threshold control to the maximum level you want to send to your recorder which, for most digital recorders, is 0 VU. Because 0 VU is referenced differently from one manufacturer to another, start by setting the Limiter Threshold to +10 dBu. For additional protection, you can engage the compressor at 2:1 ratio with a threshold just below the Limiter setting.
- Page 14 Creative effects are possible with sidechain gating as well. Sustained sounds from a synthesizer can be layered onto real drums without MIDI using the technique described in the preceding paragraph. Run a synth tone such as noise, or a pure sine wave into the line input of the VCS-1 and out to a mixer channel.
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Page 16: Specifications
VCS-1 SPECIFICATIONS System Performance Signal-to-Noise Ratio: > 102 dB, A weighted Total Harmonic Distortion + Noise: < 0.1% typical, user-variable Frequency Response: +0, -1 dB from <10 Hz to 35 kHz +0, -3 dB from <10 Hz to 70 kHz Inputs Connectors: Female XLR and 1/4”... - Page 17 Peak Limiter Threshold Range: -8 to +24 dBu (off) Attack Time: Typically <10 ms Release Time: Program dependent Gate: Threshold Range: -60 to +20 dBu Maximum Attenuation variable from 0 to 60 dB Attack Time: Typically <10 ms from maximum attenuation Release Time: Program-dependent De-esser...
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Page 18: Signal Flow Diagram
••• •••... - Page 19 Printed in the USA 18-2202-A...
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