Ran into a bit of a snag.
so, I had the thought of turning this into a 2-bus mixer. so that the inputs could either be mixed, or separate.
so I duplicated the output stage, and added a jumper so that it could be combined or separate.
and it was immediately apparent that combining the busses together makes the output opamps fight eachother.
so the question is, how do I split up the buffer resistors?
do I take my 100k that goes from the volume controls to the bus and put half before the bus and half after? is there a good ratio that keeps the output drivers happy, and doesn't change the gain significantly when the busses are joined together?
help is appreciated!
* Edit: I'm also seeing some LF rumble when I adjust the pots. is that normal? and is there a way to reduce it?
thanks
Jason
so, I had the thought of turning this into a 2-bus mixer. so that the inputs could either be mixed, or separate.
so I duplicated the output stage, and added a jumper so that it could be combined or separate.
and it was immediately apparent that combining the busses together makes the output opamps fight eachother.
so the question is, how do I split up the buffer resistors?
do I take my 100k that goes from the volume controls to the bus and put half before the bus and half after? is there a good ratio that keeps the output drivers happy, and doesn't change the gain significantly when the busses are joined together?
help is appreciated!
* Edit: I'm also seeing some LF rumble when I adjust the pots. is that normal? and is there a way to reduce it?
thanks
Jason
