Dave,
You have some good points for MIDI as an expansion interface. I'm sold.
John Loffink
The Microtonal Synthesis Web Site
http://www.microtonal-synthesis.comThe Wavemakers Synthesizer Web Site
http://www.wavemakers-synth.com > -----Original Message-----
> From: ComputerVoltageSources@yahoogroups.com
> [mailto:ComputerVoltageSources@yahoogroups.com] On Behalf Of djbrow54
>
> Here's my point for MIDI. Consider it to be a simple serial
> communciations for expansion. The programming overhead is nil and
> there is lots of flexibility.
>
> You need more D/A's? Connect it to a PAiA MIDI2CV. Eight more 7 bit
> DAC's instantly available. In running status mode, it only takes 2
> bytes for each DAC. You can send an update to all 8 DACs in less than
> 200 uS of program execution time. The actual serial transmission
> will take ~5 mS. Don't think 7 bits is enough? Consider them digital
> outputs. I have one program that drives twelve digital and one analog
> outputs.
>
> Have two ComputerVoltageSources? MIDI sysex would allow expansion and
> intermodule communication. Want to control some external SDI devices?
> A $3 Atmel processor can easily convert MIDI sysex messages to SPI.
> How about some external relays? My favorite is vactrols to interface
> external signal processors. I have a neat Ibanez digital delay that
> is only ~4 vactrols away from being interfaced to my PSIM. I can
> daisy chain my two displays together via MIDI sysex to have a 2x20 and
> a 2x8 display simultaneous. Delays do add up but are in the order of
> ~1 mS.
>
> Consider the possibilities of MIDI as a future expandability
> mechanism.
>