In article , Ian McCall
wrote:

Does anyone know if there's a utility to get average decibels from an
audio track, where 'an audio track' could mean wav, aif, mp3, or mp4
(as in I'd convert to whatever's necessary)?

Context: am trying to prepare a number of different music tracks to be
at the same level. It's my music so I have control over settings etc.,
but I've now listened to these so many times that I'm finding it hard
to be independent and quantitative about the situation.

The key snag here at present is if you're wanting the 'percieved loudness'
rather than a simply average or peak signal power.

There are lots of programs that'll give you the peak/ave/etc powers. e.g.
'sox' will do this via its 'stats' option, and is available on pretty much
all platforms for free. I've also written programs to do stats on wave
files with a 100ms resolution.

The snag is that loudness is very different. And in practice you may find
that even using a program that follows the recent standards agreements for
it doesn't suit you if your replay system (inc. room!) has, say, an unflat
frequency response, altering the weighting in that way.

Jim

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