Steve Harris wrote:

> This is a side effect of one of my attempts to get MIDI out working from
> the modular (by encoding the MIDI signal over the audio outs and then
> decoding it with some DSP software).

I don't quite understand what you've built - but it seems to be pretty hairy
:-)

So I was wondering, especially as you already use external processing to
create the actual midi, whether it maybe would be easier to use a FM modulated
signal to communicate to the ouside world.

For every change in value a negative strobe signal could be sent out.
(fm-out-1)

Alternatively, only send out signal (for  a few miliseconds) when a change
must be comunicated. (fm-out-2)

When trying to send out a continues signal that goes to fast it could be
sampled by a low speed sample&hold circuit.(fm-out-2)

Don't now if it's usable for you, but this is how I would try to do it. The
DSP has to do a little extra work maybe, as the changes are not synced to the
carrier signal. The detector could be confused by this, but I think it should
be possible to get it right.

Jan.