I use the the 5.3 build that I downloaded from the launcher, so no custom build.
I added 's_AudioImplName = CryAudioImplSDLMixer' to the system.cfg in the engine's root folder. But if I understood it right, the SDL Mixer is the default option, right?
How do I check whether SDL Mixer is running in the released game? If it doesn't what can I do?
The audio files are in the Assets\audio\sdlmixer folder of my project and they are arranged in the sandbox editor and work fine in there. When I start game mode from the editor it still works but not in the released game.
You using Release Mode for game launcher testing? Are the audio files located in PAK files? That is required for Release Mode.