In a recent Patreon video, Sam Battle (LMNC) talked about a new Arduino-controlled analog sequencer design he’s working on, and he mentioned one feature which I realized I could do on my version of his old sequencer. So I went ahead and implemented it:
If two or more buttons are held down then those are the only stages the sequencer uses. For example hold buttons 1, 3, 5 and with rotary switch set to any of 2–8, forward clocks will produce pattern 1, 3, 5, 1, 3, 5…; with switch in INC position pattern will be 1, 3, 5, 5, 3, 1; and so on.
This is purely a software change. The new software source code is at https://raw.githubusercontent.com/holmesrichards/8StepSequencer/master/Software/sequencer/sequencer.ino
Analog Output 