How can I add a stereo line out to a very good receiver. I have tape out jacks that are being used. I want a new line out for rca jacks, not volume controlled by the receiver to connect a bluetooth transmitter of anything playing on the stereo. I don't want to have to choose between outputs, I want the sound to output to multiple outs. How do I do this? Do I have to send one of the tape outs to a gizmo, like a little amp, which has multiple outputs. I can't figure this out. Thanks for any advice and suggestions.