Hello, recently tested iPhone with my preamp (Rotel RC-1590). Streaming service - Apple Music.
If I connect iphone to preamp via lightning-usb charging cable to the front USB-A input - I'm getting 44.1khz max sample rate, iphone charging, but iphone also can't control volume.
If I connect iphone to preamp via back USB-B input with this chain (iPhone -> Lightning/USB 3 adapter -> USB A - USB B -> Rotel) I'm getting up to 192 khz (as it shows in my preamp), but I can control volume from iphone and also I hear sounds from iphone (when you tapping on keyboard for example) on my speakers.
Is it actually bit perfect or the sound is going through the iOS mixer first?
If I connect iphone to preamp via lightning-usb charging cable to the front USB-A input - I'm getting 44.1khz max sample rate, iphone charging, but iphone also can't control volume.
If I connect iphone to preamp via back USB-B input with this chain (iPhone -> Lightning/USB 3 adapter -> USB A - USB B -> Rotel) I'm getting up to 192 khz (as it shows in my preamp), but I can control volume from iphone and also I hear sounds from iphone (when you tapping on keyboard for example) on my speakers.
Is it actually bit perfect or the sound is going through the iOS mixer first?