Finally got a Tallin Dual VCA from Xaoc. Tallin is a perfect VCA for adding tremolo on top of an envelope. After playing around to find a nice sound source, I came up with this patch, which I’ll describe in detail.

Audio path: The main oscillator is the Joranalogue Generate 3, which gets phase modulated by the sine wave of my Weston Precision Audio TZ0 oscillator. The two oscillators track the same 1 volt/octave control voltage. The Full output of Generate 3 (a mix of three waveforms) goes into the Tallin and Tallin’s output goes to Mimeophon. I use Mimeophon here as a mono input, stereo output effect.

This simple, automatically playing patch uses random voltages.

Control starts with the (now discontinued) 2hp RND. I clock RND externally, from the Clock Out of the Mimeophon. This results in the gate output being random, as well. This gate is used to trigger an AD envelope generator and also to trigger a separate random voltage from the Modbox sample & hold. The envelope is patched to Tallin’s exponential CV input. The random voltage from Modbox controls the Zone of the Mimeophon.

The RND output is a random stepped, positive voltage, which is directed to four spots: the 1V/octave CV of both oscillators, the mu input (1V/oct) on the Mimeophon, and through an attenuator to control the frequency of a sine wave LFO in Xaoc Batumi.

The key ingredient here is the use of the Batumi LFO to modulate the linear CV input of the Tallin VCA. This is patched through an attenuator for managing the depth. The result is a tremolo imparted on the exponential envelope. It’s patched such that higher pitches correlate with faster tremolo.