Date: Wed, 22 Nov 1995 18:26:46 -0800
From: ftom@netcom.com (fTom)
Cc: dmahoney@mayo.edu, analogue@hyperreal.com
Subject: Re: Pro One Sequencer

atomic@netcom.com (Mike Metlay ++ Atomic City) writes:

>MRA3105 AT ROCVM writes--
>>
>>   >Pro One would be my first choice of flexibility and nice sounds plus all
>>   >those performance goodies of cv/gate in/outs arpeg, sequencer, etc. etc.
>>   >legion@netaxs.com
>>
>>   How is the sequencer programmed?

>Flip the RECORD/PLAY switch to RECORD. Play some notes (up to 40, shared
>between two sequences). Flip the RECORD/PLAY switch to PLAY.

It takes me a few more steps:

1. Start with left switch to "off", right switch to "play" (which is the
normal way to play the thing unless

2. Right switch to "record".
3. Left switch to "seq 1" (or "seq 2").
4a. Play notes.  Timing doesn't matter.
4b. To sequence a rest, flip the right switch to "record", then back
   to "play".
5. Right switch to "play".
6. Left switch to "off".

To playback, set left switch to "seq 1".  The sequence will start
immediately with no transposition (i.e., in the same key you
programmed in).  The LFO provides the gate; it's a 50% duty cycle
square wave (sequencer "holds the key down" for half of the LFO
period), so to play legato you need to use a longish release.

To transpose on-the-fly, press any key and the sequence will be
immediately transposed to that key.  If you press the C key an octave
up from the lowest key on the keyboard, you will get the key you
programmed the sequence in.  The D key to the right gives you 1 step
higher, low C gives an octave down, etc.  If you program the sequence
in C, the transposed key will match up with the key you press.

>Play a note.
>The sequence plays back starting on the note you play,

Mike, does yours really work that way?  I wish mine did.

One more thing.  The CV out can go negative if you tranpose downwards
so the sequencer is playing notes beyond the left end of the keyboard.
Worst case is including low C in the sequence and transposing to low
C, in which case you can get down to -1V (says the manual).

And oh yeah, another thing that's hard to figure out about the Pro One
by looking at the front panel is that you can get the LFO to retrigger
on keypress by switching the arpeggiator on.

fTom.