This URA is properly calibrated.The
URA is a random voltage source with five unique random outputs, two of which
are derived from independent white noise sources snagged by two discrete
sample and hold circuits. While the S&Hs are normaled to these noise
generators, any signal can be patched into them. The S&H inputs have level attenuators.
S&H #2 features an adjustable slew on the output.
A temperature compensated 1V/OCT tracking main clock is hardwired to
S&H #1 and normaled to an external clock input jack, which is wired
to S&H #2. A range button sports two modes - one goes from sub to
high speed audio rate, the other goes even slower to low sub audio.
1V/OCT FM input.
The Toggle A/B output will toggle sampling the inputs of S&H 1
and 2. A very slight propagation delay in the sample pulse permits this
output to take unique samples from the two noise sources. In effect this
is a unique random source derived from two completely unrelated noise
A jumper selects the Toggle circuit to either always use the main clock - or - to use an external clock if patched in.
Random Flux is a smooth random voltage derived from noise and jerky
oscillations. Works like a 4th sample and hold with lots of
slew/integration applied. The sample timing is wired to the External clk
input - which is normaled to the main clock. The Flux can be influenced
by positive CV - processed via an internal vactrol. The +/- probability
is also voltage controllable.
The random pulse output is an additional clock and digital noise
source with 7 stages/divisions. The undivided pulse is the most random
and the last division is much more regular. In between is well, um - in
between those two degrees of randomness.
As an audio source, more regularity exhibits more of a discernible tone embedded in the digital pitched noise.
The density/pitch of the gates/noise is adjustable and voltage controllable from sub to audio rate.
Last is an independent vactrol integrator. The integrator smooths out
pulses into triangle-shaped voltages at the output. Therefore, the
random pulses are normaled to the integrator input - but any signal can
be patched into it for processing. This vactrol integrator is different
from a normal integrator in that the output is a non-linear curve rather
than a linear one. Think of loose S-curves along the expected linear
The integrator speed is adjustable and voltage controllable as well.
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