Forking each sox command to the background causes samples to play non-deterministically and step over each other. Here's a better way: # Define notes for m

Forking each sox command to the background causes samples to play non-deterministically and step over each other. Here's a better way: # Define notes for major seventh chord starting on A 440 A=440 C_SHARP=554.37 E=659.25 G_SHARP=830.61 case "$layout" in Finnish) kitty +kitten themes --reload-in=all Apprentice & play "|sox -np synth 0.2 sine $A" \ "|sox -np synth 0.2 sine $C_SHARP" \ "|sox -np synth 0.2 sine $E" \ "|sox -np synth 0.2 sine $G_SHARP" \ vol -30dB 2>&- & ;; 'English (US)') kitty +kitten themes --reload-in=all Default & play "|sox -np synth 0.2 sine $G_SHARP" \ "|sox -np synth 0.2 sine $E" \ "|sox -np synth 0.2 sine $C_SHARP" \ "|sox -np synth 0.2 sine $A" \ vol -30dB 2>&- & ;; *) echo >&2 'Invalid $layout - must be "Finnish" or "English (US)"'; exit 1 esac