alsa-project/alsa-lib issue #438 was edited from m-paq: Hi, I'm currently working on a project and I'm trying to use the async handler through `snd_async_add_pcm_handler`. I don't really understand where the issue comes from and how to debug it but I keep getting an error on this function call in my project. To try to figure out what's wrong I went in the test files and tried to run the test file `pcm.c` and added a print of the error code (`snd_strerror`) Compiling with: `gcc pcm.c -o test_pcm -lasound -lm` Running it with `./test_pcm -m async` But it keeps giving me the following output: ``` Playback device is default Stream parameters are 44100Hz, S16_LE, 1 channels Sine wave rate is 440.0000Hz Using transfer method: async Unable to register async handler Function not implemented ``` from line 434. I am able to run it in write mode with the correct behaviour, so my question is: **Is this an issue with the device or is it an issue somewhere else?** If ever this is not the correct place to ask this question please refer me to a more adequate place. Thanks to anyone that can help me! Issue URL : https://github.com/alsa-project/alsa-lib/issues/438 Repository URL: https://github.com/alsa-project/alsa-lib
