I'm trying to implement a function where a client function can be called to fill a playback pcm's buffer, before it is started. It doesn't quite work as I expected though, the transient sounds muted. On the other hand, unless I fill the buffers before hand (normally with zeros), I get a burst of noise. But anyway, maybe my goal can be accomplished with the help of ALSA-lib? I've taken a good look at the sw_params interface, but I don't quite understand the intention of some of the functions even after browsing the docs. What's the purpose of set_start_threshold? Will a start threshold equivalent to buffer size mean the pcm is not actually started before the buffer is full, even after snd_pcm_start has been called (so that the buffer is in effect primed)? Sorry for bothering you guys about the seemingly obvious, but the documentation _is_ a bit brief regarding certain things.
Thanks
Arve Knudsen
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