01. #Linux users open your terminal (you must have ffmpeg package installed).
02. Type the following bash command
for i in {100..1000..100}; do ffplay -f lavfi -i "sine=frequency=${i}:duration=0.1" -autoexit -nodisp -loglevel quiet; done
03. Enjoy!
@nixCraft Dang it. A long time ago I gave a talk on the wonders of sox(1). I had a shell script that would use it to play happy birthday, but I can't find it now.