2014-12-16, 08:41
Audio as flac, aac and so on is _never_ passthroughed. It's decoded to float by AudioEngine and then output on the sink in a matching format. If the sink can do the input sample rate and no volume is applied it's "untouched". Else it's resampled and volume is applied.
When AC3 transcode option is enabled and only 2 channels (!) (don't mix that with number of speakers) are available, it's transcoded (which also resamples if input samplerate != 48 khz) to AC3 and output as virtual dolby format.
When AC3 transcode option is enabled and only 2 channels (!) (don't mix that with number of speakers) are available, it's transcoded (which also resamples if input samplerate != 48 khz) to AC3 and output as virtual dolby format.