Sean M. Pappalardo wrote: > Albert Santoni wrote: >> 1) Was that aseqdump log captured from the output of Mixxx or the >> input to the SCS.3d device? > > I just tried aseqdump on the SCS.3d port and it only shows what the > SCS.3d is sending, not receiving. So I'm quite sure the aseqdump on the > Mixxx port shows what Mixxx is sending, not what the SCS.3d is receiving. > > I wonder if I should try to pipe the device through JACK's MIDI and see > what happens. > >> I wonder if the USB-MIDI kernel module is intentionally >> limited to sending at the MIDI baudrate. > > Even if that's the case, data shouldn't be *lost,* just delayed.
That depends on the buffer sizes used. Essentially MIDI is fundamentally limited in baud rate and one could wonder whether it's a good idea to delay messages for a long time. Same remark holds for just dropping them of course. I don't know about how the USB-midi driver/spec handles this, I only know that the spec for MIDI transport over firewire using AMDTP explicitly mandates that you don't send faster than the wire rate. I should note that the FFADO code for the SCS.1 devices does not have this limitation as it doesn't use AMDTP encapsulation. The HSS1394 protocol that stanton developed doesn't have any speed limitation. The FFADO aseq-HSS1394 bridge basically acts like aseqdump, so it should be interesting to see whether all data arrives there. If you run the test-scs bridge with the -v7 option you should be able to see some traces of data passing through the bridge. Alternatively you can hack some debug statements in the writeHSS1394Message function in src/genericavc/stanton/scs.cpp. Greets, Pieter ------------------------------------------------------------------------------ Crystal Reports - New Free Runtime and 30 Day Trial Check out the new simplified licensing option that enables unlimited royalty-free distribution of the report engine for externally facing server and web deployment. http://p.sf.net/sfu/businessobjects _______________________________________________ Mixxx-devel mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/mixxx-devel
