linuxaudio.org

Hallo!
>>> Do you just want to adjust the loudness between multiple files?

quoted text
>>> (this means there is just a constant gain for every file so the they

>>> are similar on average)

>>> Or do you also want to change the loudness inside one track?

>

> Not sure what you mean. I don't to change the internal volume of each

> track. Basically I just want to avoid that when I program the levels of

> the patches on my hardware synth, I later (on stage or rehearsing with

> the band) realize that on some songs my synth is too loud and on some

> songs it's to soft.

I meant, if you have longer files with a high loudness range, maybe you

should also adjust the loudness of different regions within your file  -

but I guess it's not the case ... ;)
> I tried it on a couple of files:

quoted text
>

> atte@blokhus:~/music/bands/eldorado/mp3$ ls *.wav | xargs -iarg ebur128 arg

> Integrated loudness:     13.7 LU

> Loudness range:           3.8 LU

> Integrated loudness:     13.0 LU

> Loudness range:           2.2 LU

> Integrated loudness:      6.0 LU

> Loudness range:           3.6 LU

> Integrated loudness:     10.8 LU

> Loudness range:           4.5 LU

> Integrated loudness:     12.9 LU

> Loudness range:           3.2 LU

>

> Ok, so it seems the third file is softer than the rest, which is very

> true. But how do I interpret those values, and how do I call sox for a

> gain adjustment?

That's great - now you only have to bring all your files to the same

loudness!

For example, let's say you want all files to be at 13 LU.

You can apply a simple gain on all files:

-0.7 dB for the first file (13.7LU), 0dB for the second, +7dB for the

third (6LU) and so on ...
I think you can do that with sox - and maybe it's also good to use an

additional limiter (at -1dBFS or lower), to avoid clipping!

AFAIK sox has the compad effect, which can do that ...
Have a nice weekend,

LG

Georg
--

auphonic - automatic audio post production

http://auphonic.com

audio development, machine learning, open source and more

_______________________________________________

Linux-audio-user mailing list

Linux-audio-user@lists.linuxaudio.org

http://lists.linuxaudio.org/listinfo/linux-audio-user