[LAD] MIDI jitter - Today for 4 of 4 tests my USB device did pass all tests with success

On Mon, 2010-07-05 at 10:15 +0200, Ralf Mardorf wrote:
> -------- Forwarded Message --------
> From: Ralf Mardorf <ralf.mardorf@email-addr-hidden-dsl.net>
> To: Clemens Ladisch <clemens@email-addr-hidden>
> Cc: Linux Audio Developers <linux-audio-dev@email-addr-hidden>
> Subject: MIDI jitter - Today for 4 of 4 tests my USB device did pass all
> tests with success
> Date: Mon, 05 Jul 2010 10:14:21 +0200

> I'm very sceptic regarding to the ALSA MIDI latency test, OTOH the PATA
> might have caused 7 ms and IIRC 19 ms too and visually interpretation
> might mistake because it's hard to find the start of waveforms in the
> noise.

I guess (don't know), that 7 ms and 19 ms are caused by a broken HDD,
but when I did the visually test the HDD wasn't broken, I did it a long
time ago.

So the visually test around 4 ms and ALSA MIDI latency test around 4 ms
from today might be correct results for my computer and at least when I
got 4 ms for the visually test, the audible result was unusable for
music, anyway, I still have got some hope.

To be continued ASAP.

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Received on Mon Jul 5 12:15:05 2010