What DAC are you connecting your S4 tablet to? AFAIK / understand, UAPP works only within the OS of your device, so connecting your streaming input to your internal DAC, without additional resampling. If you're using the digital OTA connection with an external DAC, I'd presume that the output is the same as the source resolution and bit depth.
I'm using a Schiit Yggdrasil DAC which has the Unison USB upgrade. I would like to use the AES/EBU input of the Yggdrasil with the Iris DDC.
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