On 10/2/21 7:46 AM, Dan Ritter wrote:
Do you have a microphone plugged in? Try arecord test.wav and make some noise, then hit ctrl-c to stop the recording. Use aplay test.wav to play it back. If you need a more sophisticated interface, consider installing audacity. -dsr-
Thank Dan! i don't have microphone i want to record sound being played by application, alsaloop is needed i will use .wav or .au format, hopefully my cell phone can play it