Computer Audio Asylum

Sampling Rate to Choose in Audio Midi Settings in Mac.

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I have been trying to compare iTunes playback into a Prism Orpheus DAC using different sample rates for playback. My intention wasn't to try different sample rates, but I noticed that changing the sample rates in either the Prism Control Panel or the Audio Midi Control Panel for music recorded at different sample rates didn't lead to profound audible differences. For example a HRx recording converted to AIFF 24/176.4 played back at 44.1 didn't lead to a major sonic difference. Also, playing back 16/44.1 bit recordings at 176.4 didn't lead to a major sonic difference (although slightly better).

Am I doing something wrong. Is it OK to have the sample rate settings different than the recordings native sample rate?

I use a Mac Mini w. 4GB and have Amarra installed (trial version) but turned off. I also can't hear any difference with Amarra turned on or off. But, I do hear a difference with the Amarra trial installed or not. The playback sounds much better with the trial version of Amarra installed. This is independent of it turned on in the control interface or not. Kind of strange, but something is amiss.

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