On Mon, 2003-01-13 at 09:04, Clemens Ladisch wrote: > Mark Knecht wrote: > > I recently purchased an RME HDSP 9652 card. The card is working fine > > for audio, but the MIDI interface is a timing disaster. The interface > > works, but won't keep time. A 2 minute song is Rosegarden takes abut > > 2:45 to play every time. You can hear how the HDSP isn't delivering > > closely spaced MIDI events together, but is sort of smearing them out. > > The hdsp driver doesn't send more than one MIDI byte per timer tick. > IMHO it should be modified to send in a loop until the FIFO is full > (however, I don't know if the HDSP has a FIFO at all). And it should start > sending in output_trigger() instead of delaying it to the next timer tick. > Clemens, Thanks for the response. One comment I forgot to make in the first post. This MIDI interface works fine under Windows, so whatever causes the problem is purely a Alsa MIDI issue. If we can figure it out, then we can fix it.
I agree that it sounds like this sort of one note per timer tick. When the interface is supposed to send a chord, it sends what sounds like an arpegiated chord. It's all smeared out. Is there some example code I could look at to understand implementing a FIFO? However, if there is a FIFO Full indication, doesn't we need to know _how_ it's indicated? I would assume it's different for all cards? (Bus possibly similar for cards from the same manufacturer? Also, this is the HDSP 9652, which is a single PCI card. Is this problem showing up for the DigiFace/MultiFace type cards? Thanks, Mark ------------------------------------------------------- This SF.NET email is sponsored by: FREE SSL Guide from Thawte are you planning your Web Server Security? Click here to get a FREE Thawte SSL guide and find the answers to all your SSL security issues. http://ads.sourceforge.net/cgi-bin/redirect.pl?thaw0026en _______________________________________________ Alsa-devel mailing list [EMAIL PROTECTED] https://lists.sourceforge.net/lists/listinfo/alsa-devel
