Why do my LP's sound better than CDs?

[theaudiohobby]

There may be couple of reasons for this, but one that was suggested in the latest edition of Hi-Fi News, that I had not thought of before but once you think about it, it is fairly obvious, that is that the limited dynamic range of LPs gives them an upper hand much in the same way as subtle use of compression makes wide dynamic range music more listenable on dynamically challenged equipment. More to the point and on more subjective level and even objective level, there are a variety of reasons why an LP may sound better than the equivalent CD, however shrillness and harshness should not be included or least should be very minimal except on the most incompetent engineered CDs, so without mincing words, I will suggest that your CDP or DAC section of your receiver is very sub-standard vis -a vis your analog gear.

As for your question, I very much doubt that changing the digital input will alter the sound much since they pass through same DAC, changing from toslink to coaxial may have some effect but not so much as to totally banish the reported issues, though you may give a try. Since you are already using the DAC section of your receiver, audition better DACs. Also why not try out the analog outputs of your CDP, they may sound better than the receiver.