31 Aug
2013
31 Aug
'13
1:41 p.m.
On Fri, Aug 30, 2013 at 11:35:59PM +0100, Gordon JC Pearce wrote:
Hi folks,
I'm having some really odd behaviour trying to send sysex to a synth where I can only
send (using snd_rawmidi_write) in three-byte blocks. The only exception is if I send
something not a multiple of three bytes but terminate the transfer with 0xf7, it will send
everything including the 0xf7 - but this kills the sysex transfer.
With a bit of testing, I've determined that at least the USB interfaces I have at hand
do not support sysex. They will pass some interestingly "interpreted" version
of sysex, which is of course corrupted and unreadable by the device. This pretty much
explains why I've never successfully transferred anything over sysex.
Looks like I need to devise an interface that doesn't use USB-MIDI for sysex.
--
Gordonjcp MM0YEQ