[linux-audio-user] SysEx data & OSS emulation

Christoph Eckert mchristoph.eckert at t-online.de
Wed Feb 16 16:27:09 EST 2005


> The USB MIDI protocol has three sysex bytes per packet, so
> it seems the first packet gets dropped for some reason.

ah, interesting info.

> If you're using a UHCI(?) controller

I find

ohci_hcd               23560  0
ehci_hcd               34692  0
ohci1394               35716  0
ieee1394              312376  2 eth1394,ohci1394
uhci_hcd               35216  0

To be honest, I do not know if I really need both uhci and 
ohci; I guess not?

> and this happens the 
> first time you're receiving data after having unloaded the
> driver before, this may be a bug in the kernel.  A
> workaround would be to reload the USB drivers(s), too.

I'll do some tests the next days. Maybe I'll wait because I 
just ordered a new USB-MIDI-Patchbay and I'd like to do the 
tests with it, so I can ensure it does not depend on my 
current Edirol UM-1S.

 Best regards


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