Check if the 650 is putting out 1 volt higher each octave. A MIDI
keyboard might be easier than a sequencer for this test.
0. Like Paul said, double check the 650 is set for the 12T Equal Temp scale.
1. Put voltmeter on 650 CV out.
2. Play a note and hold it. Measure voltage.
3. Play the next octave higher. Voltage should be 1 volt more.
If playing an octave up make voltage go up 1 volt, the 650 is fine and
your problem may be the VCO, a bad cable, etc.. Try a different VCO
and/or a different cable.
Let us know what happens.
Richard Brewster
http://www.pugix.comPaul Schreiber wrote:
> a) the power supply has nothing to do with it
> b) how do you know it's the '650, not the VCOs?
> c) are you certain the 12T Equal Temp scale is selected?
> d) there is a small 11-turn white trimmer that sets 1V/Oct.
> Paul S.
>
> ----- Original Message -----
> ∗From:∗ Gene Schwartz <mailto:implode7@...>
> ∗To:∗ MOTM <mailto:motm@yahoogroups.com>
> ∗Sent:∗ Saturday, April 21, 2007 7:41 PM
> ∗Subject:∗ [motm] Motm 650 not tracking pitch correctly
>
> I haven’t used it in awhile, and I’ve moved to a new apt. I’m
> noticing now that an octave on my midi sequencer is producing
> far less than an octave through the motm 650. Microtonality is
> nice, but I’d like to have this working correctly. I’m very
> far from expert in such areas, but could the power in this
> place be screwy? Everything else seems to be working...I think.
>
> Thanks,
> Gene
>
>