Not in my system; every USB card I have tried won't allow the CD tray to close...so none I've seen will be replacing my CD's.
USB Cards to Replace Compact Discs?
Did anyone read this posted over at audiophile audition?
"USB Cards to Replace Compact Discs? - First Impression Music sees the technology of USB audio cards and accompanying drives replacing CDs in years to come. They are credit card size and played on a USB player, computer or music server. FIM has already produced the first USB audio card in 96K/24-bit format, and is working on the development of a high-tech USB player, operating much like a CD player, and capable of playing true 192K/24-bit files by clicking a remote control. Such cards are to replace the hassle of hi-res downloads and library problems. FIM hopes to have a production unit in the near future."
"USB Cards to Replace Compact Discs? - First Impression Music sees the technology of USB audio cards and accompanying drives replacing CDs in years to come. They are credit card size and played on a USB player, computer or music server. FIM has already produced the first USB audio card in 96K/24-bit format, and is working on the development of a high-tech USB player, operating much like a CD player, and capable of playing true 192K/24-bit files by clicking a remote control. Such cards are to replace the hassle of hi-res downloads and library problems. FIM hopes to have a production unit in the near future."