You can connect a music player like an iPod with a minijack I don’t think iPhones have those anymore. You can connect a laptop to the USB. You can try an adapter for USB not sure if it will work on the phone. You could get a streamer and connect either optical or USB. You can use bluetooth to connect the phone.
Another beginner question...
My DAC amp has a USB-B port in the back. Is there any way I could attach that to my iPhone and stream music?
Thank you.
Thank you.