I have an Onkyo ND-S1 as external S/PDIF interface connected to my Mac and this one to a DAC. The S/PDIF interface in the Onkyo can only handle 16 bit and 44.1 resp. 48 kHz. Decibel switches between them as it should as I can confirm on the DAC when playing files with these rates.
When I now play a 96 kHz file in Decibel it switches to 48 kHz. Downsampling would need to apply a low-pass filter for 24 kHz first and then just leaving out every second sample. Is there any low-pass filter applied anywhere - and if yes: where?
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