As far as I know, several settings within Audirvana Studio will alter the ‘bits’ of an audio stream so the playback is no longer bit perfect. These settings include:
- Enable volume levelling (replay gain)
- Enable upsampling (PCM > PCM and PCM > DSD)
- Enable software volume control
- Enable VST or Audio Units plug-in effects
- Convert (downsample) DSD to PCM
Also, when AS loads any PCM audio file/stream, it decodes it into a 64 bit space to process, then outputs it to the bit depth accepted by the DAC (usually 24 bit) . Does this alter the bits or keep them bit perfect? (The 64 bit depth appears in a pop-up window when you click on the album you are playing in the bottom left corner)
Does anyone know the answer, or if there are also other processes within AS that can cause it to be ‘not bit perfect’?