The sub-octave waveform on the ASV is a sort of triangle wave. It can be made more like a triangle wave by changing R114 to 12K from 10K. This change does alter the sub-octave's sound and will make it less buzzy. If you like the current sound there is no need to change anything.
This applies to all production issues of the main board, ie. 1.1 and 1.2. This change has been included in the Builder's Guide from version 1.20.
Tony
ASV: Sub-octave waveform improvement
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