Documentation of Aniplayer
The option 'Resample' gives sound reproduction that is faithful to
the original (but can slow the machine for some frequencies). On a
machine without DMA sound, this option is not available because it is
possible to obtain the exact frequency with the YAMAHA chip.
The option 'Turn off sound' disables sound output, for example to
answer a telephone call.
The option 'Sound only' allows you to hear the sound correctly if the
movie playback is too slow otherwise.