Circuit Slices Sample and Noise CS019 User manual

Circuit Slices, LLC Sample & Noise User Manual CS019
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he Circuit Slices Sample + Noise is a dual-function module for Eurorack-compatible synthesizers.
Packed in a narrow panel is a classic analog ‘sample & hold’ circuit and an analog noise source with
three outputs – white, pink, and low frequency noise.
Specifications for the CS019 Sample + Noise
Noise output level: Factory set to about +/- 5V (10Vpp) User Adjustable from +/- 10V to 0V
Noise output bands
White (flat-band)
Pink (low-pass filtered to 3dB/octave for a less ‘bright’ or muffled noise signal.)
LF (very low, non-periodic ‘frequency’ near 8 Hz. Useful as a random CV.)
Noise source: amplified transistor junction noise
S&H CLOCK trigger level: >1V (any level greater than 1V)
he S&H circuit samples and outputs voltage levels in the +/- 10V range.
Connections: Standard 3.5mm jacks
Depth: 37mm
Panel width: 4 HP
Power required: +12VDC @ 20mA, -12DC @ 17mA, using a standard Eurorack 10-pin power connection
Features for CS019 Sample + Noise
Classic analog ‘sample & hold’ and noise circuits in a narrow 4 HP module
hree noise outputs – white and two filtered
Adjustable noise output level
Low cost, due to modern surface-mount manufacturing production
DIY expansion option for the use of an internal clock source
Low power consumption (20mA or less per supply)
Includes power cable and case screws

Circuit Slices, LLC Sample & Noise User Manual CS019
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Installation
he Sample + Noise module is ready to install in your Eurorack system. Simply mount the panel using
the supplied screws and route the ribbon-cable power connector to your power bus.
Be careful making the connection to your power bus and double check your connection before
applying power he red stripe on the ribbon cable must be toward the -12V pin on the power bus and
the module. Note that it can take a few seconds after power-up before you see a signal at the noise
outputs.
WARNING: Reversed power may damage the module and your power supply.
Using the Sample & Hold
A typical patch for this classic analog ‘sample & hold’ is to apply a low-frequency sinewave or triangle
waveform to the IN jack with a clock source plugged into the CLOCK input. hen patch the OU signal to
a VCO to produce a sequencer-like effect. Adjust the clock rate and input frequency for various pitched
sequences. See the patch below.
If your clock signal is generated from a MIDI-CV module having a MIDI clock output, your patch will be in
sync with your MIDI drum machine or computer sequencer. his is not the only patch to try. As an
example, the gate from an analog sequencer could be divided by 4, using a clock divider, and sent to the
S&H CLOCK input allowing you to produce a CV that ‘holds’ and only changes for every forth note
played.

Circuit Slices, LLC Sample & Noise User Manual CS019
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Using the Noise Source
Patch a little white noise to the input of a VCA or VCF, while also adding a very sharp attack and decay
envelope to produce interesting percussive hits, or with longer attacks, steam-pipe organ sounds.
he PINK output is useful for producing lower-pitched sounds, while the LF output can be used to
thundering rumbles or random pitch sequences when used as a control voltage. And the obvious patch
is to use noise for the input to your sample & hold, while clocking it with a steady clock source. his will
produce random pitched steps if the S&H is patched to a VCO.
Note that the LF output is “normalled” or pre-patched to the Sample & Hold input, saving you a patch
cord (this modification is included in Rev 3.0). And of course, if you patch into the Sample & Hold ‘IN’
jack, the normalled LF signal will be disconnected to the input.
he amplitude of the outputs is user adjustable using a single PCB-mounted trimmer, P1. he trim
potentiometer is located on the board between the WHI E and PINK jacks. Use a small screwdriver to
adjust the noise outputs – turning counter-clockwise will decrease the output. he factory setting keeps
the white noise at about +/- 5V, with some peaks just above. he PINK and LF outputs will be a little
lower, within +/- 5V. You can adjust higher or lower than this.
DIY Option for Internal Clock Source
If you would like to expand the capabilities of this module, you can add a switch and potentiometer to
enable an internal clock source function. First remove the shorting jumper on J9 (located between the
OU and CLOCK jacks), then an SPD switch can be connected to J9 to select between the internal clock
or an external source. A 1 Meg ohm potentiometer is then connected between the two pins of J8
(located between IN and OU jacks). See the figure below for wiring details.

Circuit Slices, LLC Sample & Noise User Manual CS019
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his DIY option was not included as most patches will use a master or MIDI clock, to keep everything
synchronized.
If not using this internal clock option a shorting jumper must be placed between the center and lower
pins of J8. he module comes from the factory with this jumper installed. See below.
For easier RA E adjustments, you can use a ‘Log’ taper pot. he switch and potentiometer could be
mounted on a narrow blank panel positioned next to your Sample + Noise module.
If you use ‘0.1’ headers to connect to J8 and J9, and wire as shown, you will not void the module’s
warranty.
his little and very affordable module will greatly expand the capabilities of any modular synthesizer
rack. We know you will enjoy experimenting with noise, sampling patches, and random control signals
for hours on end, but don’t forget to make music!
his module is limited-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 rail
Aurora, OH 44202