[alsa-devel] speaker-test man page should mention the proper way to exit

[積丹尼 Dan Jacobson]

The speaker-test man page should mention the proper way to exit
speaker-test.

^C gives

Write error: -4,Interrupted system call
xrun_recovery failed: -4,Interrupted system call
Transfer failed: Interrupted system call

except when run with -c 2.

See also https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=802935