Noise Tools 1U Manual
D.
TRIG - A pulse sent here determines the rate at which the signal appearing at the
SAMPLE IN jack is sampled (or tracked). If nothing is plugged into the TRIG input, then
Noise Tools uses its own internal Pulse generator as the TRIG signal.
E.
SAMPLE IN - Input signal to be sampled (or tracked) by the sample & hold (S&H)
circuit. Any signal appearing at this input is sampled every time Noise Tools receives a
pulse (either from its internal Pulse generator or via the TRIG input).
If nothing is plugged into the SAMPLE IN jack, then Noise Tools’ WHITE noise output is
used as the sample source. White noise produces the widest range of random values
when sampled by a sample & hold circuit. If you want a more subdued set of random
values that skews toward lower frequencies, you can patch the PINK noise output into
the SAMPLE IN jack.
Any type of signal (not just noise) can be sampled. For example, assume you clock a
slow LFO with a division of the same pulse you send to the TRIG input. If you then send
that LFO to the SAMPLE IN jack and connect the HOLD out to an oscillator’s pitch
input, you’ll hear a repeating arpeggiated sequence, rather than the random stream of
notes you’d hear if you sampled noise.
Another interesting way to use the SAMPLE IN feature is to feed it an audio signal
(such as the output of an oscillator), then adjust the clock rate to get varying “bit crush”
effects from the HOLD output.
F.
HOLD - Outputs the sampled (or tracked) signal generated by the sample & hold circuit.
G. SLEW IN - Input for the signal you wish to slew.
If nothing is plugged into the SLEW IN, Noise Tools routes the HOLD output of the
sample & hold circuit through the slew, creating a “smoother” copy of the stepped
output that appears at the HOLD output.
If you plug some other voltage source into the SLEW IN, then the HOLD output is
disconnected and the circuit slews the connected input voltage instead. You can
achieve a portamento effect if you plug the pitch output of a keyboard or sequencer into
the SLEW IN, then adjust the SLEW TIME knob to achieve the desired portamento
speed.
H.
SLEW OUT - Outputs the slewed version of the signal appearing at the SLEW IN jack.
If nothing is connected to SLEW IN, then this jack outputs a slewed version of the
HOLD output.
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