[mythtv-users] Myth, Jack & resampling

Dave Badia dbadia at gmail.com
Fri Jun 27 02:21:55 UTC 2008

So I've been playing with jack audio support in mythtv a bit....

Sample rates are still a mystery to me.
If I run jack with a sample rate of 44100      (jackd -R -dalsa -diec958
-r44100 -p1024 -n2,   sysout shows configuring for 44100Hz, period = 1024
frames, buffer = 2 periods)
and set MusicAudioDevice to JACK:
and I play songs in MythMusic that are sampled at 44100 (flac encoded files)
but I see this in the frontend log

JACK tmpdir identified as [/var/run/jack]
JACK tmpdir identified as [/var/run/jack]
2008-06-26 22:14:14.693 AO: Using resampler. From: 44100 to 48000

and 48.0 kHz appears on the mythmusic UI screen.
I confused as to why it is being resampled

Pretty sure my source FLAC is indeed 44.1, as if I switch my audio output to
ALSA:iec958, the mythmusic UI screen shows 44.1kHz.

Must admit, I'm pretty new to sample rates, etc, so I may be having some
fundamental mis-understanding here.

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