Exercise C: Sequencing
Create a patch that uses an envelope to produce separate notes. Test it with keyboard input.
Then drive this patch from a sequencer instead of a keyboard. Sequencers have a series of states, called steps, that change to produce a regular rhythm. The series normally loops indefinitely. Sequencers have at least one CV output and a gate output. You would use a CV output to set oscillator frequency and the gate output to trigger the envelope for each step. You can use other CV outputs to control additional parameters, such as filter cutoff frequency.
VCV Rack comes with one sequencer, called SEQ-3, that has three rows of knobs, with 8 knobs per row. Three jacks — ROW 1, ROW 2, and ROW 3 — carry the CV outputs for the three rows. The GATE output carries a gate signal that makes a high voltage at the start of each step.
Sequencers generally have a built-in clock. But most also have the ability to take an external clock input instead, allowing you more flexibility in the duration of the clock signal and its timing. Note the Clock Generator and Clock Modulator tags in the module picker. You can also use an LFO pulse wave as a clock signal. Then pulse width will control the durations of notes.
Other sequencers to try include any in the JW-Modules and Bogaudio brands.
- Save your rack to disk as “Exercise C.vcv,” and submit this in Canvas.
This assignment will be graded pass/fail. You may ask for help with it during tutorial before submitting it on Thursday night.