Hello, I have been using the example "pcm.c" in the alsa-lib/test directory to learn about alsa and my soundcard(audiophile 2496 ice1712).
I have found something strange that I do not understand. async_direct(mmap) method will produce no sound for my card. However, if I change the format to S32_LE in pcm.c and first specify 10 channels using async method- then I get sound when I use the async_direct method afterwards. If I haven't confused myself writing this, it looks like this: ./pcm -c 10 -m async_direct Playback device is plughw:0,0 Stream parameters are 44100Hz, S32_LE, 10 channels Sine wave rate is 440.0000Hz Using transfer method: async_direct (No sound here) ./pcm -c 10 -m async Playback device is plughw:0,0 Stream parameters are 44100Hz, S32_LE, 10 channels Sine wave rate is 440.0000Hz Using transfer method: async (Sound plays) ./pcm -c 10 -m async_direct Playback device is plughw:0,0 Stream parameters are 44100Hz, S32_LE, 10 channels Sine wave rate is 440.0000Hz Using transfer method: async_direct (Sound plays) I see the hw_params change from RW_INTERLEAVED to MMAP_INTERLEAVED. Do I need to specify my channels somewhere for the mmap to work correctly with my card? Am I smoking crack!? Thanks, Sol ------------------------------------------------------- This sf.net email is sponsored by:ThinkGeek Welcome to geek heaven. http://thinkgeek.com/sf _______________________________________________ Alsa-devel mailing list [EMAIL PROTECTED] https://lists.sourceforge.net/lists/listinfo/alsa-devel
