hello, as I have a small modular polyphonic 4 voices, I've searched for a 4 x LFO with common adjustment for delay, waveform and frequency, 4 trigger inputs and 4 outputs. As I have found nothing, I'm building one.
I've spied 2 commercial modules, Doepfer A-147-2 and Behringer 150 (a copy of the vintage Roland Modular). The oscilloscope tells me that:
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A-147-2 150 Sinus AC AC Triangle AC AC Square AD DC Saw DC DC
A vibrato on classic guitar can't decrease the pitch under the note, the fret fixes the low limit, So same question for all the waves, why AC instead of DC?