TR-505 => TR-808?

[Rob]

WEll thankS! I will look into perhaps adding a few "features" to your code
if you dont mind. ;) I really wanted a place to start off from programming
pic controlled midi devices and i didnt know exactly how to handle the
software based-uart part of it.. I *guess* from what I have been told that
using a pic that has a built in uart would be the way to go and would kill a
lot of overhead, but I still don't know if its neccesary yet.

I have entertained the idea of using your midi to sync trig software and
perhaps making a syncable analog LFO out of it by just using a routine that
takes x and multiplies by some value in a table and sends it out a few of
the addresses to a 12bit or 16bit DAC. Man, this is great..

Whatever Comes of this I wll give to you to post.

Rob



----- Original Message -----
From: <clutter at globalnet.co.uk>
To: Rob <cyborg_0 at iquest.net>
Cc: <synth-diy at node12b53.a2000.nl>
Sent: Tuesday, June 06, 2000 5:28 AM
Subject: RE: Re: TR-505 => TR-808?


> For a simple PIC-based MIDI-Trigger circuit, take a look at:
>
> http://www.users.globalnet.co.uk/~clutter/
>
> and follow the 'electronics' links. There you'll find my circuit for a
16-trigger device. The device can work on any MIDI channel (settable via a
hex-encoded switch) and each MIDI channel can support up to 8 of these
devices (the MIDI note range is settable to 0-15, 16-31, 32-47,..etc. )
>
> (If you use the circuit, or have any suggestions about improvements, let
me know!)
>
> john..
>
>
>
> In reply-to "Rob" <cyborg_0 at iquest.net> on Tue Jun  6 11:23:47 2000
> >I have been working on something exactly like this recently. It seems
about
> >a butt-stupid thing to be able to do once you get the midi working. FAR
> >easier than a midi/cv converter plus you could get I think 12 seperate 5v
> >trigger outputs from ONE pic 16f84! WEll worth the 6 bux IMHO!!
> >
> >Rob
> >
> >----- Original Message -----
> >From: Steve Richardson <prefect at sidehack.sat.gweep.net>
> >To: Byron G. Jacquot <thescum at surfree.com>
> >Cc: <synth-diy at node12b53.a2000.nl>
> >Sent: Monday, June 05, 2000 7:52 PM
> >Subject: Re: TR-505 => TR-808?
> >
> >
> >> Byron G. Jacquot wrangled the electrons to say:
> >> > If you're happy with a less elegant solution (depending on your
> >definition
> >> > of elegant), you might be able to extract a trigger from one of the
> >audio
> >> > outputs with a comparator or schmitt-trigger.  (and if you could find
a
> >626
> >> > or 707, they would work better for that, because you could steal a
> >single
> >> > voice's output for the trigger extraction.  With the 505, you're
stuck
> >with
> >> > the stereo outs, I think).
> >>
> >> Slightly more elegant might be a small microprocessor that sniffs the
> >> MIDI output.  You can configure each pad on the 505 to a different
> >> channel and note number.  It would be quite simple to get a micro to
> >> trigger given a 'note on' message.  In fact, it would be interesting
> >> to ask whoever produces that OTP MIDI clock chip (which is just a PIC
> >> I believe) if they could do a quick version that produces trigger
> >> outputs.
> >>
> >> If you use a micro with enough on-chip I/O, you could probably produce
> >> 8 such trigger outputs in a tiny package.  You could build replicas of
> >> the original x0x circuits and run them all off of a 505..
> >>
> >> -S
> >> proud(?) 505 owner..
> >>
> >> --
> >>
> >>  Stephen S. Richardson                  The GweepCo Cooperative Network
> >>  prefect at gweep.net                      network access * technology
> >vulturing
> >>  http://www.gweep.net/~prefect/         http://www.gweep.net/
> >>
> >
>
>
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