wifi (flac) to coax -- Computer to integrated amplifier

Solution
Your question seems to be incomplete.
FLAC files will play via a coax digital input.
Many integrated amps also have USB inputs so you can connect a computer directly that way. No soundcard needed so a laptop will work fine. A driver is needed for HiRes files but CD quality and below is plug and play. You can stream you files that way.
If you want to stream your files without a computer some integrated amps do have built in streamers that can access audio files via WIFI. Others have this as an outboard function. Cambridge Audio for example makes a number of excellent integrated amps and streamers.
An Apple Airport can be used for streaming too.
Your question seems to be incomplete.
FLAC files will play via a coax digital input.
Many integrated amps also have USB inputs so you can connect a computer directly that way. No soundcard needed so a laptop will work fine. A driver is needed for HiRes files but CD quality and below is plug and play. You can stream you files that way.
If you want to stream your files without a computer some integrated amps do have built in streamers that can access audio files via WIFI. Others have this as an outboard function. Cambridge Audio for example makes a number of excellent integrated amps and streamers.
An Apple Airport can be used for streaming too.
 
Solution