Circuit Slices CS030 User manual

Circuit Slices, LLC Eurorack CS030 Mixer User Manual CS030
CS030
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The Circuit Slices CS030 module is a quality, low-noise, audio and CV mixer for the Eurorack synthesizer
format sold at an affordable price.
Specifications for the CS030 Mixer
Five inputs with attenuators (inputs 1 – 5)
One input with a fixed, unity gain (input 6)
One line-level output (LINE)
One synthesizer-level output (OUT)
Selectable AC or DC coupled output
Able to mix AC and DC input signals up to +/- 10V
Selectable linear or logarithmic (audio) response for each attenuator
Output offset voltage factory-set to zero
Line-level output user adjustable
High-quality audio amplifier chip (OPA1662 or equivalent) with:
Low noise level: 3.3nV/√𝐻𝑧 @ 1kHz
Ultra-low distortion: 0.00006%
LED indicates output level (Output > 2V dim green; ≥ 5V bright green; >7V to 10V orange / red)
Power: +12VDC @ 7mA, -12DC @ 5mA
Input impedances: 100K
Depth: 33 mm (1.3”) with power cable plugged in
Panel width: 8 HP
Features for the CS030 Mixer
High-quality, yet affordable Eurorack audio & CV mixer
Selectable logarithmic or linear response for each potentiometer
Zero DC offset -- critical for mixing pitch-control voltages
Low power consumption
Low noise using audio-quality amplifier chip
Reverse power protection
Modern SMT manufacture and single PCB design makes the module very affordable
Very small depth -- great for use in “skiff” cases
Includes power cable, case screws, and shorting jumpers

Circuit Slices, LLC Eurorack CS030 Mixer User Manual CS030
CS030
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UM
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Setup & Installation
Before installation, determine the jumper settings for the potentiometers (H1 to H5) and the jumper
option for AC or DC output coupling (J9).
 If exclusively used as an audio mixer, move the shorting jumpers (H1 to H5) to the “AUDIO”
position and the output coupling jumper, J9 to the “AC” position (blocks any DC voltages from
being transferred to other modules or external equipment).
 If primarily used as a CV mixer, select “LIN” for H1 to H5 and select “DC” at J9.
 If used as a CV mixer OR audio mixer, position H1 to H5 jumpers to “LIN” and J9 to “DC” This is
the factory setting. In this configuration, you can still mix audio signals; you only lose the audio-
taper “feel” of the controls.
 The line-level output (LINE) is factory set to output about 1 Vpp with a 10Vpp (+/- 5V) signal
input. You may need to adjust TRIM2 (Line Level) for your external device.
Route the ribbon-cable power connector to your power bus and mount the panel into your case using
the supplied screws. While this module does include reverse power protection, please be careful
making the connection to your power bus and double check your connection before applying power.
The red stripe on the ribbon cable must be toward the -12V pin on your power bus.
Mixer Use and Ideas
 Use the mixer as the final stage in your rack to mix-down to an external audio mixer or USB
audio interface.
 Use as a CV mixer for a VCO, with keyboard CV patched to input 6 (no attenuation preserves
1v/oct tuning) and pitch-bend CV, and modulation CV, sent to the variable inputs, 1 and 2.
 Daisy-chain the output of one mixer to input 6 of another mixer for a 10-channel mix.
 Use two modules for a stereo audio mix.
This module is warranted for one year with parts, under normal use – not including the application of
reverse or over-voltage power by customer. Return shipping to Circuit Slices from customer not
included. Return to Circuit Slices, LLC for repairs. Circuit Slices, LLC reserves the right to replace the
module if necessary. Please keep your receipt / packing slip for warranty information.
Circuit Slices, LLC
10028 Windjammer Trail
Aurora, OH 44202