These two identical sections generate a constantly varying random voltage whose rate of change is set with fluctuation rate and with a control voltage. Its rate goes into audio range, resulting in a sort of pitchable and tonally playable noise.
Besides that a random gate signal is generated, not depending on or derived from the random CV, i.e. a gate is not produced only at high voltages but totally arbitrary, useful for triggerred random melodies.
The random voltages in this section are generated by a digital 6 bit circuitry which emits a variable number of stored CV values. The number of possible states is depending on the output and the setting of the voltage controllable Quantization parameter. For instance: if n = 3, output 2ⁿ will play eight values (2³ = 8) and output n+1 four values (3+1 = 4).
Analog Shift Register:
An extremely rare function in Eurorack is an analog shift register (ASR), virtual a multistage, cascaded sample & hold which passes its outpout to the input to the next S&H stage at a trigger or when pressing the button. If several identially tuned VCOs are connected to the ASR the played melody is delayed at each outpu and the VCOs play in a canon. Very easy trick for creating arabesques.
Here you find three sound sources: white noise, pink noise and metallic noise. Latter ist a mix of square wave oscillators with different, fixed frequencies and it resembles the TR-808's cowbell/cymbal sound source.
per Fluctuating Random: Rate CV input, random CV output, random gate output
Quantized Random: trigger input, quantization CV input, 2ⁿ output, n+1 output
Analog Shift Register: global trigger input, 4 CV inputs, 4 trigger inputs, 4 S&H outputs
Noise Source: outputs for white, pink and metallic noise
3U Eurorack module, 18 HP wide, 26mm deep
current draw: 120mA @ +12V and 80mA @ -12V