Re: [LAD] MidiSport vs. UA25

I ran into a benchmark tool at http://github.com/koppi/alsa-midi-latency-test/
and ran it though my MidiSport 2x2 Anniversary Edition (no firmware upload
required :) ) and Edirol UA-25EX.

Attached are the results on an untuned Debian Testing machine (2.6.30-1-686)
started with 'chrt -f 50 ./src/alsa-midi-latency-test -s 40'

The Edirol sure outperformed the MidiSport - the difference didn't seem huge
though.

(at the time of writing you need to add some symlinks to
/usr/share/automake-1.10/... to make it build right, mailed the author about
that already).

Regards,

Arnout

On Thu, Sep 24, 2009 at 07:56:22AM -0400, Dave Phillips wrote:
> I've been experimenting with MIDI control from one machine to another. I
> checked the timing of a single note played simultanesouly by instances
> of QSynth on both machines and was surprised to hear a very noticeable
> flamming. I then replaced the MidiSport 2x2 with my Edirol UA25 and the
> flamming disappeared. Both are USB interfaces, btw. MIDI routing between
> the machines is handled by a Yamaha MJC8 and has never been problematic
> with that box.
>
> So, my question(s): Is the MidiSport just poorly designed and is there a
> further condition or module option that can correct the timing delay
> from that unit ?
>
> Best,
>
> dp
>
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