Analogue-sequencer

Colin,

 > The fine tempo tune is on the DATA knob, rather than the TEMPO knob.
 > If it was on the TEMPO knob, then once you had fine-tuned the tempo, the
 > TEMPO knob would be in the wrong position realtive to the current coarse
 > tempo, so you'd get an unpleasant jump if you then tried a small
adjustment.

Thanks for the Tempo fine tune explanation, makes perfect sense, just me
being dim again

 > That's a problem I identified a couple of days ago with the PIC used for
the
 > DIN sync to midi sync conversion.
 > The clock-only midi out is generated from the standard P3 DIN sync out by
a
 > PIC 12C508 running my midi to din/din to midi sync code.
 > This has always worked perfectly when connected externally to the sync
 > output of a P3, so I was scratching my head a bit when I found it was
giving
 > odd behaviour just by being moved onto the mainboard. What is stranger is
 > that the PIC sends spurious START bytes, without sending a STOP byte, but
 > the code shouldn't allow this - the state must change from running to
 > stopped, back to running, so a START should always be followed by a STOP.
It
 > seems this is some sort of instability in the PIC itself. The fix is to
add
 > 100n capacitors to the clock and run input pins on the PIC. You can do
this
 > yourself, or you could ship it back to me and I'll fix it.
 > I'll document this in the construction notes when I update them.

It's not a problem at the moment

 > I'll have a think about sticky keys...
 > Alternatively, I could retrofit a footswitch socket, for PLAY/EDIT and
FUNC
 > pedals.

 Sticky keys would be good as would the footswitch, though I'd probably go
for PLAY/EDIT and RECORD, along with a RUN/ STOP footswitch

 > If the current note is not in the forced scale, the routine looks at the
 > note one above to see if it is.
 > If it is, it sets the current note to that note.
 > If it isn't it looks at the note one below the current note, to see if
it's
 > in the scale.
 > If it is, it sets the current note to that note.
 > If not, it will check 2 above, then 2 below, 3 above, then 3 below, and
so
 > on, until it must eventually hit the root note.
 > Does that help ?

Very helpful, it will come in handy when working out if chords will
transpose properly with FTS on

Thanks
Jez




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