[mythtv-commits] Ticket #10087: mythmusic: 88.2KHz/24bit/6ch FLAC/WAV distorts

[MythTV]

#10087: mythmusic: 88.2KHz/24bit/6ch FLAC/WAV distorts
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     Reporter:  ignissport@…          |      Owner:  paulh
         Type:  Bug Report - General  |     Status:  new
     Priority:  trivial               |  Milestone:  unknown
    Component:  Plugin - MythMusic    |    Version:  0.24-fixes
     Severity:  low                   |   Keywords:
Ticket locked:  0                     |
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 88.2KHz/24bit/6ch becomes distorted on playback when played in mythmusic.
 This occurs in both FLAC and WAV formats.

 I've replicated this on two machines with very different hardware setups.
 One was an Audigy 2 ZS running through headphones over pulseaudio, the
 other was an onboard SP/DIF direct to an external amp (no pulse). Both
 played other formats fine, but heavily distorted when playing FLAC/WAV in
 this specific sample rate/bit depth/channel.

 44.1KHz/16bit/Stereo plays fine.
 48KHz/16bit/Stereo plays fine.
 88.2KHz/24bit/Stereo plays fine.
 88.2KHz/16bit/6ch plays fine.
 96KHz/24bit/Stereo plays fine.
 96KHz/24bit/6ch plays fine.

 It's just 88.2KHz/24bit/6ch that distorts. If I re-encode the FLAC/WAV as
 16bit, it plays back fine.

 The FLAC/WAV also plays fine in other media players (including mythffplay)
 and passes a "flac -t" test.

 mythffplay output:
 (a file that distorts)
 Audio: flac, 88200 Hz, 6 channels, s32

 (a file that does not distort)
 Audio: pcm_s16le, 88200 Hz, 6 channels, s16

 I suspect this may have something to do with changes introduced ticket
 #9930, but I can't be sure.

 Both test machines are running v0.24.1-96-ge89d6a9
 branch fixes/0.24

 I've marked it as low/trivial as I suspect I'm the 0.0001% of the
 population that actually has media in this format.

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Ticket URL: <http://code.mythtv.org/trac/ticket/10087>
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