Answer: Do not use a digital cable...
Do not use any of those connections or USB DACs, sell your CD player and go discless. The sound will be far superior. A LINN DS unit is a much better sounding solution in one box, all controlled from an iPad and get rid of the CD player totally. Files would be sent via CAT5/6 from your PC or NAS and controlled in your listening chair with an iPad. Having any other connections (USB, SPDIF converters, etc.) are just mucking up the sound. Access all your music at better than CD quality once ripped with dbPoweramp into 24/96 or 24/192 FLAC or WAV files. The LINN Akurate DS will beat out CD players in excess of $10k.
Do not use any of those connections or USB DACs, sell your CD player and go discless. The sound will be far superior. A LINN DS unit is a much better sounding solution in one box, all controlled from an iPad and get rid of the CD player totally. Files would be sent via CAT5/6 from your PC or NAS and controlled in your listening chair with an iPad. Having any other connections (USB, SPDIF converters, etc.) are just mucking up the sound. Access all your music at better than CD quality once ripped with dbPoweramp into 24/96 or 24/192 FLAC or WAV files. The LINN Akurate DS will beat out CD players in excess of $10k.