MOTM

I finished the MOTM-120 last night, finally!  I think I did everything
correctly (not without burning fingertips and mixing up wires along the
way), but I'm not entirely sure.  The signals I'm sending are coming
directly from a Nord Modular, so they're not the full 10V peak-to-peak that
the MOTM is expecting.  In Sub mode, if I turn any of the suboctave knobs
beyond 2, I hear a lot of buzzing.  I think this is expected, and it just
sounds like buzzing because the original signal is getting drowned out.  Is
this correct?  In Cross mode, sometimes I still hear a sustained signal
after I stop sending any input to IN-A.  Is this also attributable to weak
signals?  Tonight I'm going to plug a Mackie mixer inline to boost the
signal and find out more.

--PBr, anxiously awaiting pre-amps...

> In Sub mode, if I turn any of the suboctave knobs
> beyond 2, I hear a lot of buzzing.  I think this is expected, and it just
> sounds like buzzing because the original signal is getting
> drowned out.  Is
> this correct?

Er, no. You shouldn't hear buzzing unless that's what your input signal
sounded like. Send it a clean single pitch waveform, as hot as you can. In
sub mode, you should hear square waves 1, 2, 3, & 4 octaves lower as you
turn up the outputs. Make sure your input waveform is high enough in
frequency, or the lower octaves output by the 120 will be below the human
hearing range (or speaker reproduction range), and you'll just hear clicks.

Dave Bradley
Principal Software Engineer
Engineering Animation, Inc.
daveb@...