I tried using a USB mini to USB C adapter, and nothing. Can it work? Thanks.

I have a large-ish CD library from the pre-streaming/pre-iTunes days. I have ripped most of them to various lossy formats. That was time consuming and I don't care to do it again, but would like to have FLAC files of my music. Is there a service that will do this? Would it be cheaper than buying...

I am using a Samsung S5 as the source, Neutron's player. I have Beyerdynamic's DT770 Pro (32 ohm)(my main cans), Grado SR60s, and Westone's single driver in-ears.   Suggest a sub $200 DAC/Amp for me.   Sound is the main goal - features second.   Thanks.

I have a Samsung S3 (soon to upgrade to S5). Would I get more benefit out of a DAC/Amp or would an amp alone give me the same result? The cans I have are Byerdynamic 770 (32 ohm), Grado SR60, and Westone single driver in-ears.   I am using lossy files, but I will upgrade to lossless files.  ...