Hi - SX3 here.
I’ve got an M-Audio Omni pre-amp, which has multiple pre-amp inputs. I recorded a stereo piano track, “Left” out from my piano into one preamp input, “Right” out into another.
Playing back what was recorded and listening on headphones, I noticed that the left side was somewhat louder than the right side. This seemed to be confirmed by looking at the waveforms, the left side was “larger” than the right, and also when doing statistics, it was the same thing. I rechecked all the balance controls in the chain … all centered.
The pre-amp has a dial for the gain/trim on each channel, so it’s kind of hard to visually dial in the precise same gain in each channel - it’s not like you type in a digital amount. I was trying to think of a sound source that was 100% reliably reproducible, so I could record it once through the left channel, then once through the right, and compare amplitudes.
I couldn’t think of a sound source that was 100% reliable, so then I thought of using an insert cable - XLR at one end, split into a TS x 2 at the other end. I don’t have one of those, so I’d have to buy one (don’t solder, can’t even spell it …).
Is that a good way (using an insert cable) to do what I want - have the pre-amp gain/trim identical in each channel when recording a stereo source? For all I know, maybe it WAS recorded correctly (since I played more low notes than high ones, and low notes are mapped to the left more than the right), but I’m just looking for a way to know for sure that I’m matched well between the two channels.