It could be a loose connection inside the transport. Did you try going back to the rca cable? If you wiggle the cable at the transport connection does anything change?
Buzzing in Speaker while Playing CDs
I have a Cambridge CXC CD transport connected to a Schiit MultiBit external DAC. Recently there developed a buzzing in the left-channel speaker ONLYwhen playing CDs. After a bit of sleuthing, I replaced the RCA cable from the transport to the DAC with a new optical cable. The problem was temporarily resolved. Several weeks later, the same buzzing reoccurred. This suggests to me that the cables between the transport & the DAC are not the issue; but rather the transport or the DAC. Since I do not have another transport nor another external DAC, I am at a loss in trying to isolate the source of the problem. Any suggestions that you might have would truly be appreciated. Thank you kindly.
Kit