Not a problem. FastTrack on linux - Page 14
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Thread: Not a problem. FastTrack on linux

  1. #131
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    Mar 2010
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    Quote Originally Posted by darkbasic View Post
    Ok, so here it is my script if someone else need it.
    Thanks for posting! I guess this will be helpful for lots of users.

    Quote Originally Posted by darkbasic View Post
    Do you know why jack doesn't work without plughw? See my previous post.
    Sorry, I've got no clue.

    Regards,

    Felix

  2. #132
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    Apr 2010
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    Quote Originally Posted by fexpop View Post
    Sorry, I've got no clue.
    Does it work without plughw for you?

  3. #133
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    May 2010
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    plughw means that alsa is resampling generally it means that the hardware can't be switched to the sample rate that jack is running natively. I'd double check that you've configured jack for a supported sample rate.
    Computer Make/Model: Lenovo T61p
    Operating System: Debian GNU/Linux and alsa patches for M-Audio FTU
    Processor: Intel(R) core2 duo
    RAM: 8G
    Ardour(DAW), JACK, audacity, vpkb
    M-Audio Fast Track Ultra. K5000s, behringer truth monitors. K90 Piano

  4. #134
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    Apr 2010
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    Quote Originally Posted by nevyn View Post
    I'd double check that you've configured jack for a supported sample rate.
    Isn't 48KHz a supported sample rate?

  5. #135
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    move your .asoundrc out of the way and ensure that "force 16 bit" is not selected in qjackctl
    Computer Make/Model: Lenovo T61p
    Operating System: Debian GNU/Linux and alsa patches for M-Audio FTU
    Processor: Intel(R) core2 duo
    RAM: 8G
    Ardour(DAW), JACK, audacity, vpkb
    M-Audio Fast Track Ultra. K5000s, behringer truth monitors. K90 Piano

  6. #136
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    Apr 2010
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    Quote Originally Posted by nevyn View Post
    move your .asoundrc out of the way and ensure that "force 16 bit" is not selected in qjackctl
    It didn't help... :-(

  7. #137
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    Mar 2010
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    Here's the latest version of the FTU mixer patch (against alsa-kmirror). I've already submitted it to patch@alsa-project.org. Somehow my posts are still awaiting moderator approval on alsa-devel despite being subscribed there.

    I've reduced FTU specific functions to one, and kept it as general as possible. In other words, it should be useful as a blueprint for other devices.

    Please give it a try and post any errors you're aware of.

    Kind regards,

    Felix

  8. #138

    Default fast track ultra dropping samples on ouptut?

    Hi all,

    Thanks for the mixer fix - that makes a huge difference!

    I've got a subtle problem to report: I think audio playback is dropping
    sample frames. To hear the problem, open Audacity at 48 kHz and play
    a 10-kHz. sine wave. When I do that I hear a regular clicking sound, about
    four clicks a second. I've tried recording the output and if I'm seeing correctly,
    exactly one sample frame in every 13312 (13x1024) is being dropped on output.
    I don't see anything similar on input. When either jack or Pd has both the input and
    the output open, the delay from input to output gradually decreases until it forces
    occasional sync errors. (I haven't tried this with audacity though.)

    I suspected hardware trouble and tested the samedevice on a Macintosh computer;
    everything there was clean. So this looks like an ALSA USB driver problem to me.

    thanks for any ideas...
    Miller

  9. #139
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    Mar 2010
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    Quote Originally Posted by msp@ucsd.edu View Post
    I've got a subtle problem to report: I think audio playback is dropping
    sample frames.
    Thanks for posting. This really is a serious problem. I can reproduce it using pd. Hence (unfortunately) it's not a Audacity problem. I'm gonna ask for advice on alsa-devel.

    Kind regards,

    Felix

  10. #140
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    Apr 2010
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    I found a problem: plug the fast track (usb powered) and start jackd, THEN plug the AC adapter too. You will have to reboot using magic sysrq keys...

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