Uploaded files: "click-sound.txt"; "click-sound.wv" and 
"click-sound-selection.wav"

There is an annoying "click" sound when playing some WavPack files using 
MPlayer under Windows (only when using -ao win32 or -ao pcm; -ao dsound does 
not produce the "click" sound). The "click" sound appears at the end of the 
decoding process.

This issue was introduced in ffmpeg-svn-r7518 (ffmpeg-svn-r7517 does not 
produce the "click" sound).

Note: The "click" sound is only present when using MPlayer. There is no 
"click" sound when using ffmpeg.

Link to the commit message:

http://lists.mplayerhq.hu/pipermail/ffmpeg-cvslog/2007-January/006093.html

I tried decoding the problematic file using: ffmpeg, mplayer and wvunpack.

ffmpeg-svn-r7517: The "click" sound was not present in the resulting WAV 
file (the total length of the WAV file is 3:18).
Command line used: ffmpeg.exe -i click-sound.wv 
click-sound-ffmpeg-svn-r7517.wav

ffmpeg-svn-r7518: The "click" sound was not present in the resulting WAV 
file (the total length of the WAV file is 3:19).
Command line used: ffmpeg.exe -i click-sound.wv 
click-sound-ffmpeg-svn-r7518.wav

mplayer-using-ffmpeg-svn-r7517: The "click" sound was not present in the 
resulting WAV file (the total length of the WAV file is 3:18).
Command line used: mplayer -ao pcm click-sound.wv

mplayer-using-ffmpeg-svn-r7518: The "click" sound was present in the 
resulting WAV file (the total length of the WAV file is 3:19).
Command line used: mplayer -ao pcm click-sound.wv

wvunpack: The "click" sound was not present in the resulting WAV file (the 
total length of the WAV file is 3:18).
Command line used: wvunpack click-sound.wv

Information according to foobar2000 v0.9.4.2:

click-sound.wv --> 3:18.587 (8757672 samples); 20 373 546 bytes
click-sound-ffmpeg-svn-r7517.wav --> 3:18.587 (8757672 samples); 35 030 732 
bytes
click-sound-ffmpeg-svn-r7518.wav --> 3:19.675 (8805672 samples); 35 222 732 
bytes
click-sound-mplayer-using-ffmpeg-svn-r7517.wav --> 3:18.587 (8757672 
samples); 35 030 732 bytes
click-sound-mplayer-using-ffmpeg-svn-r7518.wav --> 3:19.675 (8805672 
samples); 35 222 732 bytes
click-sound-wvunpack.wav --> 3:18.587 (8757672 samples); 35 030 732 bytes

Note: Even if "click-sound-ffmpeg-svn-r7518.wav" and 
"click-sound-mplayer-using-ffmpeg-svn-r7518.wav" seem to be the same, only 
the latter has the "click" sound at the end of the track (check 
"click-sound-selection.wav").

CRC32 according to fsum 2.51:

4b386f25 ?CRC32*click-sound.wv
d11c9c3f ?CRC32*click-sound-ffmpeg-svn-r7517.wav
13f0e698 ?CRC32*click-sound-ffmpeg-svn-r7518.wav
d11c9c3f ?CRC32*click-sound-mplayer-using-ffmpeg-svn-r7517.wav
f5e15c1c ?CRC32*click-sound-mplayer-using-ffmpeg-svn-r7518.wav
d11c9c3f ?CRC32*click-sound-wvunpack.wav

I hope you can understand this report.