Doepfer A-149-3 in detail

With the A-149-3 Fluctuating Random Voltages, Doepfer presents the third module in the A-149 series, which specializes in complex random voltages. At its core, the module consists of a noise generator, LFO, Sample & Hold and a slew limiter. Everything can be used separately or combined to generate a constantly changing control voltage.
The SLEW UNIT smoothes the internally normalized signal from the Sample & Hold or an externally supplied control voltage. This can be done with a set value and/or a different control voltage.
The TRIANGLE LFO is primarily a simple LFO with a triangle waveform and three speed ranges. The control Noise adds white noise to the waveform, making the LFO increasingly noisy and unstable. The noisy triangle is normalized as a modulation source to the input of the S&H and is output as an independent waveform (N Tri).
The SAMPLE & HOLD function does exactly what you would expect: Wait for gate, Clock or trigger at the input, sample the voltage at CV In and output the voltage value held at the trigger time at CV Out. Thanks to the internal clock generator, the S&H constantly generates a staircase-like random voltage. The Noisy LFO is pre-patched as the sample source, but you can also use any other control voltage as a source, including the internal noise generator. The output of the S&H is normalized to the slew limiter.
The outputs +3dB, -3dB and Flat are the noise generator, which generates white, pink and blue noise in parallel.