Why don't these signals null?
On 10/16/19 10:51 PM, James Price wrote:
Let's say I record a DI guitar part into a looper, then re-amp that
looped part and record the output twice to separate tracks in a DAW,
time-align them and invert the phase on one. I know the tracks won't
null, but I don't fully understand the why.
When you run the signal through an amp, through the air, into a microphone
you open yourself up to some variables that may change between passes. Were
you in the room during the recordings? Did you move at all, or breath with
a different pattern the second time? Was the ambient noise exactly the same
both times? The acoustic space that you sent the signals through will never
be the same during both passes. Even if you recorded the straight and inverted
tracks at the same time, you'd use two different mics that would collect altogether
different signals because of their mismatch, and necessarily different positions.
Also, you say you time aligned the two tracks, but did you get that sample perfect?
what about clock drift that may have been different between takes?
What was the result anyway, if not null? Was it pretty quiet anyway?
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