midi-cv endwork progress...

Grant Richter grichter at execpc.com
Fri Nov 5 22:37:58 CET 1999

One thing I would like to see implemented is
the MIDI equivalent of a Looper. A small sequencer
with just record then play that would automatically
loop the MIDI events between record and play.
Like hitting infinite loop on a digital delay.
The Synthi AKS sequencer works like this and
is a very musical tool for space/trance/ambient.

> From: Roel Das <roelrules at yahoo.com>
> To: synthdiy <synth-diy at mailhost.bpa.nl>
> Subject: midi-cv endwork progress...
> Date: Friday, November 05, 1999 1:15 PM
> I've been reading manuals of Kenton en Encore
> midi-cv's lately, here's what i found, to keep you all
> informed...
> This is VERY interesting lecture for anyone who ever
> wants to build something alike. The midi-exclusive
> chapter usally contains an address map! You already
> know half of the registers you need.
> What i'll try to build in mine, from what i've read; 
> - LFO's, for sure. Fun to play with, and all the
> professional models have this. (My promotor told me, i
> should IMPROVE what's already available, or do the
> same at very low cost...) 
> The LFO's would have different waveforms (a table,
> quite easy to implement, right?), AND i will add
> different sync sources/modes.
> They should be syncable with MIDI-Clock, in a simple
> reset-way (as in the Encore expressionist) but also in
> the complexer way Kenton does it, the wavelength is
> adapted to match the clock (I'd use one of the timers
> avaiable on the processor to measure this). And a
> reset-way sync with key-on.  
> - Maybe add an AD(D)SR, programmable. Velocity-control
> on this?
> - Multiphonic mode, just one algorithm to decide which
> note gets stolen. (The oldest one. I don't really see
> the advantage in the other algorithms... Someone?)
> - Monophonic; with note priorities: newest, lowest,
> highest and something i really want to add:
> arpeggiator; up, down, up/down, (maybe random in a
> way? There's an easy way to implement a pseudorandom
> generator digitally... Don't know if it works with
> three or four bits...) 
> - maybe an easy sequencer type thing, for example, you
> press one note and you play chords (chord memory) or a
> lick (cfr arpeggio?)
> - maybe midi-exclusive. MIDI-upgrades would be a
> challenge and easy to make corrections/add-ons
> afterwards...
> And some questions:
> Which ranges of control voltages should i foresee?
> for key-cv and other cv? 
> Usefull and useless trigger-modes?
> Other standards, cfr rolands preMIDI, WASP, SYNC24?
> Which are important? Anyone know if i have to get
> permission to implement these?
> Anyone of you ever bothered of tuning the equipement
> with a screwdriver? Encore is proud of having this
> programmable, Kenton does it the screwdriver way... I
> think menus are just as bad to work with... 
> Greetings 
> roel
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