I have a 27" (late 2010) iMac and I had a question about the setting to leave the output of Audio MIDI Setup. I have the Yulong D100 DAC (supports 24-bit/192KHz input) and would be connecting through the iMac's optical output.
I have quite a few 24/96 and 24/192 files (though most of my files are 16-bit) that I would like to play back through the iMac. I do not want to spend the extortionist fees for Sound Studio Amarra. I want to set the output settings in Audio MIDI Setup ONE TIME and never have to change them again.
My understanding is that iTunes will resample the files' output to whatever the output settings are in Audio MIDI Setup before pushing that signal out of the iMac's optical connection. If I set that output to 24-bit/96KHz, will iTunes upsample 16-bit/44.1KHz files and downsample 24-bit/192KHz to match the 24/96 setting in Audio MIDI Setup?
I am guessing that 16/44.1 upsampled to 24/96 will sound better (or at least undergo less degradation) than 24/96 downsampled to 16/44.1. Is that correct? Should I set Audio MIDI Setup to 24-bit/192KHz instead or will the upsampling of 16/44.1 to 24/192 degrade the SQ more than the upsampling of 16/44.1 to 24/96?
Am I correct in thinking that changing the output setting in Audio MIDI Setup will make that change permanent until I manually change the setting again? It will not reset by itself? Any help would be appreciated.