On Tue, Dec 4, 2012 at 2:05 PM, Giovanni Mugnai <musical777@xxxxxxxxx> wrote: > But i can't still insert wav files.. If is not a problem for you, i > wait patiently when you can take some time to exactly look at the code The Haiku Media kit will convert any mp3, wav, aiff, avi, mpeg etc. file into 16 bit int raw, good for audio, provided that the files are 44100Hz stereo (which allmost all files are). You need to request the correct format from BMediaTrack::DecodedFormat something like: media_raw_audio_format format; format = media_raw_audio_format::wildcard; format.frame_rate = 44100; format.channel_count = 2; format.format = media_raw_audio_format::B_AUDIO_SHORT; format.byte_order = B_MEDIA_LITTLE_ENDIAN; regards Marcus