SDL2 No Audio produced on certain formats

SDL Development
1

I am trying to get audio format AUDIO_U16LSB working without any luck.

I have some sample raw audio in that format and I have verified with sox(d) by converting it to wav format

sox -r 44100 -e unsigned-integer -b 16 -c 2 -L audio.raw audio.wav

The wav file plays fine in any player and in SDL2 audio.

The raw file plays fine in Audacity.

However I cannot get the raw file to play in SDL2. I just get humming.

I am setting the audioSpec like so

		audioSpec.callback = NULL;
		audioSpec.channels = 2;
		audioSpec.freq = 44100;
		audioSpec.format = AUDIO_U16LSB;
		audioSpec.samples = 4096;

The returned spec from the open audio device is the same so I assume its supported.

Working in SDL2 windows 10 but not in SDL2 Linux Ubuntu 18.04!

Version is 2.0.8

Any ideas welcome!

2

At this point as the same code works in Windows 10 Mingw64 but fails under Linux Ubuntu 18.04 I’m going to raise a bug!

3

I’ve written a handy SDL2 utility to test the supported audio formats:

You can find it here :

SDLaudio format tester