[Flac-dev] [inzanekaoz@yahoo.com: Bug#179764: 8-bit audio samples incorrectly played back]

Matt Zimmerman mdz at debian.org
Tue Feb 4 05:36:02 PST 2003

I am forwarding this bug report from the Debian bug tracking system.  Please
preserve the CC header when responding.  To reach the submitter directly,
send mail to 179764-submitter at bugs.debian.org.

----- Forwarded message from HJ <inzanekaoz at yahoo.com> -----

Date: Tue, 4 Feb 2003 03:54:36 -0800 (PST)
From: HJ <inzanekaoz at yahoo.com>
Resent-From: HJ <inzanekaoz at yahoo.com>
To: submit at bugs.debian.org
Subject: Bug#179764: 8-bit audio samples incorrectly played back

Package: xmms-flac
Version: 1.1.0-3

All flac packages {flac, libflac4, xmms-flac} are Debian Sid release
1.1.0-3. xmms is Debian 1.2.7-1.1 .

When decoding from an 8-bit sample resolution audio file (8-bit .wav
-> .flac), the audio upon playback is severely clipped; heard, as
well as seen with visualization plugins.  The problem persists even
with --no-replay-gain given to the encoder, and is present in both
mono and stereo audio files.  Sample rate (eg, 11khz, 22khz, 44khz)
seems to be irrelevant.

16-bit flacs are played back properly.

flac -d  (to decode)  writes a properly-scaled .wav as expected.

steps in brief:

assuming "snd_8.wav" is, for example, a 44100 stereo 8-bit Microsoft
WAV (PCM) file...

1. flac snd_8.wav
produces snd_8.flac

2. flac -d -osnd_8_2.wav snd_8.flac
outputs: snd_8_2.wav, from snd_8.flac

3. xmms -e snd_8.flac snd_8_2.wav
snd_8.flac waveform-clips severely, but snd_8_2.wav plays fine

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----- End forwarded message -----

 - mdz

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