For CD playback, yes, I've heard various enhancements that can make a difference. All of them relate to reducing the read error rate of the transport device (and hence reducing the need for error correction in the digital stream). I found black marker on the top of the disk to work about as well as anything. Differences are nominal to great depending on your CD player.
However, when it comes to ripping CDs to digital format - a computer treats a music disk no different than a data disk. If you have the right software, it will read and re-read sectors until it gets it right - resulting in a bit perfect file.
That, in a nutshell, is the beauty of PC audio - you know you are always starting with a perfect source file that does not rely on expensive transport equipment to read the data and create the digital stream in real time.
However, when it comes to ripping CDs to digital format - a computer treats a music disk no different than a data disk. If you have the right software, it will read and re-read sectors until it gets it right - resulting in a bit perfect file.
That, in a nutshell, is the beauty of PC audio - you know you are always starting with a perfect source file that does not rely on expensive transport equipment to read the data and create the digital stream in real time.