Uploaded August 2022 | Updated September 2026, 3 weeks ago

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After several people forwarded links to a subreddit with hundreds of posts ranging from informed and curious to insults and and confusion, I decided to dive in and use this opportunity to share my perspectives.

This is Reddit Responses Decorrelation Demo:
I demonstrate a method to use two mics on a single source such that the signals have audible decorrelation

This is episode 2:
I dive into reading and responding to a variety of comments some curious, some practical, some pointing out how dumb and wrong I am but all of them fun!!

In episode 1:
I respond to " I Don't Understand Dave Rat" and describe the issues with sending the same signal to multiple speakers covering the same space as well as offer solutions to help mitigate comb filtering in stereo systems

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00:00 Intro
00:12 Complete misunderstanding
01:08 What he should have done
02:19 Broken universe - test setup
03:33 Mic 1 to both speakers in polarity
04:03 Mic 1 rev polarity to one speaker
04:48 Phasing/Comb filtering of same sound multiple sources
05:30 Mic 2 in polarity 2 speakers
06:05 Mic 2 rev polarity to one speaker
06:19 Polarity and decorrelation
06:56 Mic 1 to speaker 1 and mic 2 to speaker 2, both in polarity
07:34 Mic 1 to speaker 1, mic 2 out of polarity to speaker 2
08:20 All tests
08:47 Reddit reads
09:26 Summary
10:03 Mic placement is critical
10:20 Sonic landscape
10:47 More redit reads
11:07 Understanding
11:21 Outro