Convert Mono to Stereo before or after editing?


Source file: WAV44/24bit/Mono

If I wanted to do a basic cleanup/sweeten in Audition of this mono voice recording, would I perform the edits BEFORE converting to stereo or AFTER?

Thanks in advance.


Posted 2017-03-27T04:42:54.380

Reputation: 157

Are you going to apply stereo effects as part of the process? – Simon Bosley – 2017-03-31T13:04:10.553



I just came up with a rule of thumb. I don't know if it is is really any good or not, but maybe worth considering.

If you are taking things away (cleanup) better to do it in mono. If you are adding things, (sweetening such as reverb) better to do it in stereo.

Phil Freihofner

Posted 2017-03-27T04:42:54.380

Reputation: 316

2I'd go one further; never actually convert the file at all, just use mono effects on the channel bus & stereos on the output, then export the result as stereo. – Tetsujin – 2017-03-27T06:28:39.183


The decisive step for answering this question is the "converting to stereo" step. You are adding another dimension not present in the original after the step.

If this step is done with a specialized convert-to-stereo filter (like there are special ways to add color to black-and-white films), your preprocessing in mono should be focused on improving the match of this process' assumptions with the presented material.

That is, you are going to try equalizing artifacts of the microphoning and equipment, then do your mono-to-stereo conversion, then do the work focusing on improving the quality to the listener.

If your mono-to-stereo conversion is just "make two copies of the mono channel", then it's pretty much all the same what you work with apart from filters with explicit stereo output like most reverbs and stuff like Leslie simulators.

So basically you first do work in mono for the sake of the mono-to-stereo conversion, then you work in stereo for the sake of the listener.

When the mono-to-stereo conversion is trivial, the point where you go to stereo is somewhat arbitrary, but don't go back to mono after explicit stereo effects.


Posted 2017-03-27T04:42:54.380

Reputation: 11