Re: [LAU] linux-rt & presonus 1818VSL

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To: Jeremy Jongepier <jeremy@...>
Cc: <linux-audio-user@...>
Date: Wednesday, July 3, 2013 - 8:32 am

On 07/03/2013 10:09 AM, Jeremy Jongepier wrote:

I don't know if that's USB-2.0 or something else.. - The same goes for
the statement that "USB devices should perform better if the sample
rate is divisible by the period size". I cannot find any evidence that
supports that statement.

As with all complex systems, I trust measurements more than theory:

http://robin.linuxaudio.org/tmp/vsl1818latency.png

(x-axis are permutations of jackd's -p, -n, --sync parameters,
no x-runs with either configuration but it's just jackd + jack_delay,
no load).

[Surprisingly]? the latency increments are not quantized to
milliseconds (as the USB protocol implementation would suggest it should).

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Messages in current thread:
[LAU] linux-rt &amp; presonus 1818VSL, Fero Kiraly, (Tue Jul 2, 4:53 pm)
Re: [LAU] linux-rt &amp; presonus 1818VSL, Harry van Haaren, (Tue Jul 2, 5:49 pm)
Re: [LAU] linux-rt &amp; presonus 1818VSL, Robin Gareus, (Tue Jul 2, 6:27 pm)
Re: [LAU] linux-rt &amp; presonus 1818VSL, Jeremy Jongepier, (Wed Jul 3, 8:09 am)
Re: [LAU] linux-rt & presonus 1818VSL, Robin Gareus, (Wed Jul 3, 8:32 am)