[LAU] comparing audio recordings on the command-line?

[Ralf Mardorf]

On Tue, 2013-09-17 at 02:37 +0000, Eric Wong wrote:
> Hi, I'd like to compare recording quality of portable recorders.
> I only care about the line-in input of these portable recorders.
> 
> I'm thinking:
> 
> * play audio through a good DAC and feed the line-in of each recorder
> 
> * copy audio files off the SD cards from the recorders

Sorry, I guess I don't understand ...

> * level match the inputs.  Probably based on "sox FILE -n stats"
>   output change input levels on each recorder to match levels.
> 
> * play audio again through the DAC and feed the line-ins

... why you want to do this?

Forget what I've written. You seemingly want to test a copy of a copy,
while doing some processing. IMO that won't give a valid result.