Strangely enough I cannot get sound from any emulator from the command line. Only via Emulationstation…

BTW I’m running RetroPie 3 (I think, I installed it last week) on a Pi 1B and I downloaded coolcv from the last comment in the mentioned AtariAge forum from the date of the 10th of November 2015 (strangely indicated as 11-10-’15 instead of 10-11-’15: American English?).