[78-L] Reversing audio

Rodger Holtin rjh334578 at yahoo.com
Tue Jul 13 11:18:38 PDT 2010

Ah, to communicate.  THIS post by Martin clicked in my little head and I finally caught what was going on here, not being all that digitally-oriented myself, but this gave me all the clues I needed to come to some minimal comprehension of the topic.


For Best Results use 01010101010101010101.


--- On Tue, 7/13/10, Martin Fenton <mafenton at talktalk.net> wrote:

From: Martin Fenton <mafenton at talktalk.net>
Subject: Re: [78-L] Reversing audio
To: "78-L Mail List" <78-l at klickitat.78online.com>
Date: Tuesday, July 13, 2010, 7:44 AM

Graeme Jaye wrote:
> True, but the discussion here is about *reversed* audio (i.e. playing
> backwards) not inverted (which is simply a phase change).

I'll try to explain more clearly.

As an experiment, I reversed a 16-bit, 44.1KHz piece of audio digitally 
using ProTools. I then reversed it again so it was playing the correct 
way (note: I reversed it again, physically putting it through the 
process, NOT simply Undoing the process which would be pointless.)

I then pasted the double-reversed file over an inverted copy of the 
original in order to see if there were any artefacts remaining. It 
cancelled out. Ergo: no change to the audio.

It seems as though we actually agree here, but we're at cross-purposes 
as to what I mean.


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