底层硬件参数48k,16bit FramesPeriods - AlsaProject 1帧 2声道 48kHz 16bit的pcm 大小是4字节 一个period是每一个中断需要处理的一系列帧 buffer 是一个ring buffer,buffer size 比period_size要大,一般是2倍的period_size,有些是8倍 现在 硬件设置为48k,2 period_count ,perio_size 480帧,所以buffer size...
如果设置为 32,那么用户每次读写都是 32帧数据,或者0帧数据。 参考:https://larsimmisch.github.io/pyalsaaudio/terminology.html
Skip to site navigation (Press enter) [Alsa-devel] problem with "snd_pcm_hw_params_set_period_size_near" James Courtier-Dutton Mon, 29 Sep 2003 14:53:55 -0700 if the buffer size has already been set to 16384, and the period_size is trying to be set to 8196, why do I get the...
Hi! I've tried to port some aplication from old ALSA-0.5.x to the new alsa library interface. I'm not an expert in the sound programming and available documentation seems to be rather poor in term of explaining the main concept. I would like to fully understand the exact meaning of buf...
Hello, I'm using bluez-alsa to use my Raspberry PI 3 with sound card as headless bluetooth speaker for my videprojector. Currently, I redirect sound of bluetooth to sound card with a command combination looking like arecord ... | aplay ...
> Subject: Re: [Alsa-devel] buffer_size and period_size > > > >Paul, > > So with -p 64 -n 2 settings, what number of bytes of audio data is > >transferred across the PCI bus between each interrupt? > > the period size is always (as with almost all ALSA metrics) in units ...