pub unsafe extern "C" fn synthesizer_get_voices_list_async(
hsynth: SPXSYNTHHANDLE,
locale: *const c_char,
phasync: *mut SPXASYNCHANDLE
) -> AZACHR
pub unsafe extern "C" fn synthesizer_get_voices_list_async(
hsynth: SPXSYNTHHANDLE,
locale: *const c_char,
phasync: *mut SPXASYNCHANDLE
) -> AZACHR