Couldn’t open audio device: No available audio device!

Couldn’t open audio device: No available audio device

built your own SDL

If you built your own SDL, you probably didn’t have development headersfor PulseAudio (or ALSA), so it’s trying to use /dev/dsp, which doesn’texist on many modern Linux systems (hence, SDL_Init(SDL_INIT_AUDIO)succeeds, but no devices are found when you try to open one). “apt-get install libasound2-dev libpulse-dev” and rebuild SDL…let the configurescript find the new headers so it includes PulseAudio and ALSA support.

didn’t build your own SDL

If you didn’t build your own SDL, maybe you can force it to use adifferent audio path:

SDL_AUDIODRIVER=pulse ./mytestprogram

or

SDL_AUDIODRIVER=alsa ./mytestprogram

One of those two solutions will (probably) fix your problem.