timtom
Well-known member
Hey everybody,
I want to add a MS matrix inside my AD mixer to use only 2 channels with my stereo M/S mic instead of 3 channels, for recording straight to a Nagra tapemachine. I was planning the following:
- Inserting the Matrix after the EQ section.
- make it switchable.
I used this schematic and designed this board.
The mixer is giving +/-12V.
How should the ground of the power supply and the audio be connected ? (I connected them all together)
I powered up a prototype board and I get very loud noise at 20/30hz.
I want to add a MS matrix inside my AD mixer to use only 2 channels with my stereo M/S mic instead of 3 channels, for recording straight to a Nagra tapemachine. I was planning the following:
- Inserting the Matrix after the EQ section.
- make it switchable.
I used this schematic and designed this board.
The mixer is giving +/-12V.
How should the ground of the power supply and the audio be connected ? (I connected them all together)
I powered up a prototype board and I get very loud noise at 20/30hz.