> Eliot, > Thank you very much. Here is the message. If Hotmail is the problem I can > subscribe using my work e-mail; I wanted to avoid that in the first place. > Magdalena The Hotmail message is all HTML, with no plaintext version. I'm not sure if this list accpets html mails. OR The text of the mail is all encapsulated in a number of HTML <DIV> blocks, maybe confused html to text converter... Here is the original question: > Does anyone have examples or documentation on how to configure periods, > frames and buffers for various sample rates? I am writing a program to > route a mp3 decoder output to ALSA on an ARM processor, and I get noisy > audio. For a CD quality stream (S16_LE, 44100 kHz, Stereo, 128 bps) I am > using an output buffer of 44100 bytes, a period of 44100/(channels*2). With Be careful about the distinction between bytes and frames (i.e. a frame of stereo S16 is 4 bytes) Start with the period 1024 frames = 4096 bytes then make your buffer at least 2x this: 8192 bytes (I'm not an app developer, so others may jump in with a better explanation) Did you look at the code in alsa-lib/test? > a buffer this big, I do not get underruns, but I do get all short writes. I > have not been able to find the right configuration to avoid short writes, > and more importantly, to get good quality audio. What do 'short writes' (I > am using writei) really mean? Is this a performance issue in the driver, or > is mainly because of buffer setup? I would really appreciate any help with > this. > Magdalena _______________________________________________ Alsa-devel mailing list Alsa-devel@xxxxxxxxxxxxxxxx http://mailman.alsa-project.org/mailman/listinfo/alsa-devel
