[linux-audio-dev] System Exclusive question

[Chris Wareham]

Albert Graef wrote:
> Chris Wareham wrote:
> 
>> Has anyone had succes in getting SysEx data flowing back and forth
>> between Roland sound modules and their computer?
> 
> 
> Is the usb-midi driver on your system based on Nagano Daisuke's work 
> (http://member.nifty.ne.jp/Breeze/softwares/unix/usbmidi-e.html)? I 
> recall that earlier versions of this driver had a bug which caused 
> writing and reading of sysex messages to interfere.
> 

The NetBSD driver isn't based on Nagano Daisuke's one. It appears to
predate his and was written by Takuya Shiozaki. Another poster suggested
I look at the "vsex" program, which includes a neat chunk of code for
writing to raw MIDI devices. Using this I was able to send one tuplet of
bytes to the /dev/music device before it blocked on any subsequent
writes. This suggests to me that NetBSD's USB MIDI driver and OSS
emulation arent communicating with each other properly. If so then I
think it's time I emailed the authors of those two subsystems to see if
they can shed any light on my problems.

Chris
-- 
http://www.btinternet.com/~chris.wareham/