SDL_os2audio.c (OS2_OpenDevice): change spec->samples assignment: Original code assigned MCIMixSetup.ulSamplesPerSec value to it, but it is just the freq... We now change spec->samples only either if it is 0 or we changed the frequency, by picking a default of ~46 ms at desired frequency (code taken from SDL_audio.c:prepare_audiospec()). With this, the crashes I have been experiencing are gone.