Re: [LAD] ALSA MIDI latency test results are far away from reality | Linuxaudio.org

Re: [LAD] ALSA MIDI latency test results are far away from reality

Previous message: [thread] [date] [author]
Next message: [thread] [date] [author]

From: Ralf Mardorf <ralf.mardorf@...>

To: Paul Davis <paul@...>

Cc: 64studio-devel <64studio-devel@...>, qtractor-devel <qtractor-devel@...>, 64studio-users <64studio-users@...>, Clemens Ladisch <clemens@...>, Linux-Audio-Dev <linux-audio-dev@...>

Subject: Re: [LAD] ALSA MIDI latency test results are far away from reality

Date: Wednesday, July 14, 2010 - 3:24 pm

On Wed, 2010-07-14 at 17:21 +0200, Ralf Mardorf wrote:

quoted text> On Wed, 2010-07-14 at 10:53 -0400, Paul Davis wrote:

> > On Wed, Jul 14, 2010 at 9:52 AM, Clemens Ladisch  wrote:

> > > Is this connection through JACK or through ALSA, i.e., does it show up

> > > in the output of "aconnect -l"?  From what I understand, JACK's sample-

> > > synchronous timing always adds latency, and might add period-related

> > > jitter depending on the implementation.

> >

> > the good stuff adds 1 JACK period of latency to whatever the ALSA

> > sequencer's direct delivery + the driver does, and zero jitter.

> >

> > --p

>

> I'm able to confirm this.

> If I play a virtual JACK MIDI instrument and a virtual ALSA MIDI

> instrument, 'in unison' is 'in unison'.

> I dunno if there is any measurable latency or jitter, but there's no

> audible latency or audible jitter and no visible jitter for audio

> recordings of those virtual instruments.

>

> - Ralf
PS: Not me playing, Qtractor is playing those instruments for me.
>

quoted text> Offline now
_______________________________________________

Linux-audio-dev mailing list

Linux-audio-dev@lists.linuxaudio.org

http://lists.linuxaudio.org/listinfo/linux-audio-dev

Previous message: [thread] [date] [author]
Next message: [thread] [date] [author]

Messages in current thread:

[LAD] ALSA MIDI latency test results are far away from reality, Ralf Mardorf, (Wed Jul 14, 1:23 pm)

Re: [LAD] ALSA MIDI latency test results are far away from r..., Niels Mayer, (Thu Jul 15, 5:07 pm)

Re: [LAD] ALSA MIDI latency test results are far away from r..., Robin Gareus, (Wed Jul 14, 7:46 pm)

Re: [LAD] ALSA MIDI latency test results are far away from r..., Ralf Mardorf, (Wed Jul 14, 8:32 pm)

Re: [LAD] ALSA MIDI latency test results are far away from r..., Ralf Mardorf, (Wed Jul 14, 8:16 pm)

Re: [LAD] ALSA MIDI latency test results are far away from r..., Ralf Mardorf, (Wed Jul 14, 8:24 pm)

[LAD] Tests directly routing pc's midi-in to midi-out (was: ..., Arnout Engelen, (Wed Jul 14, 5:56 pm)

Re: [LAD] Tests directly routing pc's midi-in to midi-out (w..., Ralf Mardorf, (Wed Jul 14, 6:09 pm)

Re: [LAD] Tests directly routing pc's midi-in to midi-out, Clemens Ladisch, (Thu Jul 15, 6:26 am)

Re: [LAD] Tests directly routing pc's midi-in to midi-out, Ralf Mardorf, (Thu Jul 15, 8:41 am)

Re: [LAD] Tests directly routing pc's midi-in to midi-out, Arnout Engelen, (Thu Jul 15, 9:48 am)

Re: [LAD] Tests directly routing pc's midi-in to midi-out, Ralf Mardorf, (Thu Jul 15, 10:18 am)

Re: [LAD] Tests directly routing pc's midi-in to midi-out, Clemens Ladisch, (Thu Jul 15, 10:55 am)

Re: [LAD] Tests directly routing pc's midi-in to midi-out, Ralf Mardorf, (Thu Jul 15, 11:08 am)

Re: [LAD] Tests directly routing pc's midi-in to midi-out, Robin Gareus, (Thu Jul 15, 11:45 am)

Re: [LAD] Tests directly routing pc's midi-in to midi-out, Clemens Ladisch, (Thu Jul 15, 2:31 pm)

Re: [LAD] Tests directly routing pc's midi-in to midi-out, Ralf Mardorf, (Thu Jul 15, 12:45 pm)

Re: [LAD] Tests directly routing pc's midi-in to midi-out, Robin Gareus, (Thu Jul 15, 1:36 pm)

Re: [LAD] Tests directly routing pc's midi-in to midi-out, Ralf Mardorf, (Thu Jul 15, 10:49 am)

Re: [LAD] Tests directly routing pc's midi-in to midi-out (w..., Arnout Engelen, (Wed Jul 14, 7:37 pm)

Re: [LAD] Tests directly routing pc's midi-in to midi-out (w..., Ralf Mardorf, (Wed Jul 14, 9:21 pm)

Re: [LAD] Tests directly routing pc's midi-in to midi-out (w..., Ralf Mardorf, (Wed Jul 14, 9:29 pm)

Re: [LAD] Tests directly routing pc's midi-in to midi-out (w..., , (Wed Jul 14, 9:43 pm)

Re: [LAD] Tests directly routing pc's midi-in to midi-out (w..., Ralf Mardorf, (Wed Jul 14, 9:55 pm)

Re: [LAD] Tests directly routing pc's midi-in to midi-out (w..., Arnout Engelen, (Thu Jul 15, 6:23 am)

Re: [LAD] Tests directly routing pc's midi-in to midi-out (w..., , (Wed Jul 14, 10:46 pm)

Re: [LAD] Tests directly routing pc's midi-in to midi-out (w..., Ralf Mardorf, (Wed Jul 14, 11:46 pm)

Re: [LAD] Tests directly routing pc's midi-in to midi-out (w..., , (Thu Jul 15, 8:07 am)

Re: [LAD] Tests directly routing pc's midi-in to midi-out (w..., Ralf Mardorf, (Wed Jul 14, 11:15 pm)

Re: [LAD] Tests directly routing pc's midi-in to midi-out (w..., Arnold Krille, (Thu Jul 15, 7:57 am)

Re: [LAD] Tests directly routing pc's midi-in to midi-out (w..., Ralf Mardorf, (Fri Jul 16, 9:26 am)

Re: [LAD] Tests directly routing pc's midi-in to midi-out (w..., Arnold Krille, (Fri Jul 16, 9:47 am)

Re: [LAD] Tests directly routing pc's midi-in to midi-out, Robin Gareus, (Fri Jul 16, 11:26 am)

Re: [LAD] Tests directly routing pc's midi-in to midi-out, Ralf Mardorf, (Fri Jul 16, 11:30 am)

Re: [LAD] Tests directly routing pc's midi-in to midi-out (w..., Ralf Mardorf, (Fri Jul 16, 10:06 am)

Re: [LAD] Tests directly routing pc's midi-in to midi-out (w..., drew Roberts, (Fri Jul 16, 11:02 am)

Re: [LAD] Tests directly routing pc's midi-in to midi-out (w..., Ralf Mardorf, (Fri Jul 16, 11:23 am)

Re: [LAD] Tests directly routing pc's midi-in to midi-out (w..., Arnold Krille, (Fri Jul 16, 10:19 am)

Re: [LAD] Tests directly routing pc's midi-in to midi-out (w..., Ralf Mardorf, (Fri Jul 16, 10:46 am)

Re: [LAD] Tests directly routing pc's midi-in to midi-out (w..., Ralf Mardorf, (Fri Jul 16, 10:50 am)

Re: [LAD] Tests directly routing pc's midi-in to midi-out (w..., , (Thu Jul 15, 7:57 am)

Re: [LAD] ALSA MIDI latency test results are far away from r..., Clemens Ladisch, (Wed Jul 14, 1:52 pm)

Re: [LAD] ALSA MIDI latency test results are far away from r..., Ralf Mardorf, (Wed Jul 14, 3:11 pm)

Re: [LAD] ALSA MIDI latency test results are far away from r..., Paul Davis, (Wed Jul 14, 2:53 pm)

Re: [LAD] ALSA MIDI latency test results are far away from r..., Ralf Mardorf, (Wed Jul 14, 3:21 pm)

Re: [LAD] ALSA MIDI latency test results are far away from r..., Ralf Mardorf, (Wed Jul 14, 3:24 pm)

Re: [LAD] ALSA MIDI latency test results are far away from r..., Ralf Mardorf, (Wed Jul 14, 3:27 pm)

Re: [LAD] ALSA MIDI latency test results are far away from r..., Robin Gareus, (Wed Jul 14, 3:40 pm)

Re: [LAD] ALSA MIDI latency test results are far away from r..., Robin Gareus, (Wed Jul 14, 1:45 pm)

Re: [LAD] ALSA MIDI latency test results are far away from r..., Ralf Mardorf, (Wed Jul 14, 2:22 pm)

Re: [LAD] ALSA MIDI latency test results are far away from r..., Robin Gareus, (Wed Jul 14, 3:31 pm)

Re: [LAD] ALSA MIDI latency test results are far away from r..., Ralf Mardorf, (Wed Jul 14, 5:58 pm)

Re: [LAD] ALSA MIDI latency test results are far away from r..., Robin Gareus, (Wed Jul 14, 7:43 pm)

Re: [LAD] ALSA MIDI latency test results are far away from r..., Ralf Mardorf, (Wed Jul 14, 8:08 pm)