Re: [LAU] JACK MIDI latency -- was Re: Concerning schedtool

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To: Ralf Mardorf <ralf.mardorf@...>
Cc: <linux-audio-user@...>
Date: Sunday, April 20, 2014 - 1:38 pm

On 04/20/2014 03:49 AM, Ralf Mardorf wrote:

^^^^^^ ^^^^^
it prints
JackALSARawMidiDriver::Start - Starting 'alsarawmidi' driver.
JackALSARawMidiDriver::Start - starting ALSA thread ...
JackALSARawMidiDriver::Start - started ALSA thread.
as part of the startup message.

-Xraw is needed because otherwise I don't get any midi ports at all.
fPlaybackChannels and fCaptureChannels in
/linux/alsarawmidi/JackALSARawMidiDriver.cpp are zero
otherwise.

Devin wrote:

The jitter measurement here using alsarawmidi is 100 us stddev over 10K
events, 3 bytes each (using a USB2 device - details in prev email).

That's not far off from what Devin quoted, but without knowing what and
how he measured it, I can't comment on it.

ciao,
robin

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Messages in current thread:
[LAU] Concerning schedtool, Jonathan E Brickman, (Sat Apr 19, 3:58 am)
Re: [LAU] Concerning schedtool, Jeremy Jongepier, (Sat Apr 19, 2:13 pm)
Re: [LAU] Concerning schedtool, Robin Gareus, (Sat Apr 19, 2:43 pm)
Re: [LAU] Concerning schedtool, Ralf Mardorf, (Sat Apr 19, 4:18 pm)
[LAU] JACK MIDI latency -- was Re: Concerning schedtool, Robin Gareus, (Sat Apr 19, 5:48 pm)
Re: [LAU] JACK MIDI latency -- was Re: Concerning schedtool, Robin Gareus, (Sun Apr 20, 1:38 pm)
Re: [LAU] JACK MIDI latency -- was Re: Concerning schedtool, Jeremy Jongepier, (Sun Apr 20, 1:49 pm)
Re: [LAU] JACK MIDI latency -- was Re: Concerning schedtool, Jeremy Jongepier, (Sun Apr 20, 2:05 pm)
Re: [LAU] Concerning schedtool, Robin Gareus, (Sat Apr 19, 10:31 am)