Digitally encoded content (e.g., music) is provided in a protected mode, along with a player that can unlock and/or decode this music on a user's personal computer (PC) for enjoyment only at their PC. Since the music is in a proprietary, protected form, the user cannot download to players for other formats, e.g., MP3 players, nor can a CD be burned for use external to the PC. If the user decides that they like the content and wants to use it on another playback device, e.g., a MP3 player, or copy it onto a CD-R for use in a standard audio player, the user can initiate a transaction for payment through the player. Once the transaction is completed, the player either converts or transforms the content into a format usable by the, e.g., MP3 player, or converts or transforms the content into wave format and writes it to a CD-R.