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The perceived loudness change of a change in volume depends on the listening volume: at high volumes a 1 dB increment is noticeable, but at low volumes a larger increment is needed to get a comparable change in loudness. Perceptual volume adjustment accounts for this fact, and divides the hardware volume range into a number of steps. Each step changes the dB volume by a variable amount, with most of the steps concentrated at higher volumes. This makes it possible to sweep over the entire hardware volume range quickly, without losing the ability to finely adjust the volume at normal listening levels. Use "Volume Adjustment Mode" in the system settings menu to select perceptual volume mode. The number of steps used is controlled by "Number of Volume Steps". (Number of steps has no effect in direct adjustment mode.) It's still possible to set a specific dB volume level from the sound settings menu when perceptual volume is enabled, and perceptual volume does not affect the volume displayed by themes. Change-Id: I6f91fd3f7c5e2d323a914e47b5653033e92b4b3b |
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native_midi | ||
timidity | ||
CHANGES | ||
COPYING | ||
dynamic_flac.c | ||
dynamic_flac.h | ||
dynamic_fluidsynth.c | ||
dynamic_fluidsynth.h | ||
dynamic_mod.c | ||
dynamic_mod.h | ||
dynamic_mp3.c | ||
dynamic_mp3.h | ||
dynamic_ogg.c | ||
dynamic_ogg.h | ||
effect_position.c | ||
effect_stereoreverse.c | ||
effects_internal.c | ||
effects_internal.h | ||
fluidsynth.c | ||
fluidsynth.h | ||
load_aiff.c | ||
load_aiff.h | ||
load_flac.c | ||
load_flac.h | ||
load_ogg.c | ||
load_ogg.h | ||
load_voc.c | ||
load_voc.h | ||
Makefile.in | ||
mixer.c | ||
music.c | ||
music_cmd.c | ||
music_cmd.h | ||
music_flac.c | ||
music_flac.h | ||
music_mad.c | ||
music_mad.h | ||
music_mod.c | ||
music_mod.h | ||
music_modplug.c | ||
music_modplug.h | ||
music_ogg.c | ||
music_ogg.h | ||
playmus.c | ||
playwave.c | ||
README | ||
wavestream.c | ||
wavestream.h |
SDL_mixer 1.2 The latest version of this library is available from: http://www.libsdl.org/projects/SDL_mixer/ Due to popular demand, here is a simple multi-channel audio mixer. It supports 8 channels of 16 bit stereo audio, plus a single channel of music, mixed by the popular MikMod MOD, Timidity MIDI and SMPEG MP3 libraries. See the header file SDL_mixer.h and the examples playwave.c and playmus.c for documentation on this mixer library. The mixer can currently load Microsoft WAVE files and Creative Labs VOC files as audio samples, and can load MIDI files via Timidity and the following music formats via MikMod: .MOD .S3M .IT .XM. It can load Ogg Vorbis streams as music if built with Ogg Vorbis or Tremor libraries, and finally it can load MP3 music using the SMPEG or libmad libraries. Tremor decoding is disabled by default; you can enable it by passing --enable-music-ogg-tremor to configure, or by defining OGG_MUSIC and OGG_USE_TREMOR. libmad decoding is disabled by default; you can enable it by passing --enable-music-mp3-mad to configure, or by defining MP3_MAD_MUSIC vvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvv WARNING: The license for libmad is GPL, which means that in order to use it your application must also be GPL! ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ The process of mixing MIDI files to wave output is very CPU intensive, so if playing regular WAVE files sound great, but playing MIDI files sound choppy, try using 8-bit audio, mono audio, or lower frequencies. To play MIDI files, you'll need to get a complete set of GUS patches from: http://www.libsdl.org/projects/mixer/timidity/timidity.tar.gz and unpack them in /usr/local/lib under UNIX, and C:\ under Win32. This library is under the zlib license, see the file "COPYING" for details.