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Applying software volume to S16 samples means several bits of precision are lost; at 25% volume, two bits are lost. Additionally, dithering adds some noise. The problem gets worse when you apply the software volume code twice: for the software mixer volume, and again for the replay gain. This loses some more precision and adds even more dithering noise, which can become audible (see https://github.com/MusicPlayerDaemon/MPD/issues/542). By converting everything to 24 bit, we need to shift only two bits to the right instead of ten, losing nearly no precision, and dithering is not needed. Even if the output device is unable to play S24 directly, we can convert back to S16 with only one stage of dithering. Closes https://github.com/MusicPlayerDaemon/MPD/issues/542
Music Player Daemon
A daemon for playing music of various formats. Music is played through the server's audio device. The daemon stores info about all available music, and this info can be easily searched and retrieved. Player control, info retrieval, and playlist management can all be managed remotely.
For basic installation instructions read the manual.
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MPD is released under the GNU General Public License version 2, which is distributed in the COPYING file.