On Tue, 29 Dec 2009 18:49:16 +0000, geoff <[email protected]> wrote:
>Hi there, > >I seem to have a jitter issue with external MIDI timing. Still stuck at ~30mS jitter. Booted with "hpet=force", and the kernel (and thus ALSA) found an HPET, but the timing stayed the same. At Ralf's suggestion, I ran up Win XP Home SP2, installed the latest MidiSport drivers, installed MIDI-OX and ran a loopback test. This relies on the accuracy of the MIDI-OX timestamping, but I seemed to be getting a consistent 5mS round trip from the USB interface. Which seems to indicate there's a software level incompatibility with USB MIDI (or at least, MidiSport USB MIDI) and 3.0b3. I'm looking for suggestions to ameliorate this situation. I'd also like to know whether it's worth me putting this on the 3.0b3 bug list. And can anyone describe their measured low-jitter external MIDI setup with at least 4 ports, please? (where low is < 10mS) Studio64 version: Motherboard: MIDI interface: Number of ports: Best, Geoff _______________________________________________ 64studio-users mailing list [email protected] http://lists.64studio.com/mailman/listinfo/64studio-users
