Re: JVC XL-MC334BK megachanger

The JVC changers are not currently supported by the CDJ software. With the correct wiring/circuit modification, the Slink-e should be able to connect to and control the JVC. (The Slink-e can basically control anything serial that works at a low data rate). The problems you face are:

1) I don't know the signaling levels / pinout of the CompuLink system
2) I don't know the control codes and responses for the CompuLink system
3) I don't know if the CompuLink system has a rich enough command set to allow you to identify the CDs in the changer, which is a big plus for the Sony system.