ALSASoundMeter

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Add device selector option. Like speaker-test -D.

jidanni

mention library packages needed

1

``` $ make gcc sound_meter.c -o sound_meter -lm -lasound sound_meter.c:25:9: fatal error: alsa/asoundlib.h: No such file or directory 25 | #include | ^~~~~~~~~~~~~~~~~~ compilation terminated. ```

jidanni

Hello Johnliu. I'm not a C coder, but i tryed to transform your code in a stereo meter to get the dsnoop virtual sound card to monitor recorded/streamed (stereo) signal....

allegfede