Will be using my iPhone as the source with a Topping D10 usb DAC.
This means I can use either the optical or line in on the Helix.
Catch is that the optical only does up to 96kHz so I either have to set the bit rate in a player app or just store lower bit rate music.
Or I can use the line out of the D10 at full bit rate.
Will there be any noticeable difference in the two input options?
Unfortunately I cannot test as it’s all in storage.
Source material is hi res audio from HDTracks and Amazon Music HD (although not seen much over 48KHz on there!)
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