Can Normalization Be Dom Independently For Each Channel

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#234 Can Normalization Be Dom Independently For Each Channel

Status: open

Owner: nobody

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Priority: 5

Updated: 2025-07-10

Created: 2023-03-30

Creator: Gordon Delgado

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Hi,
I use Sox in scripts to normalize my LP rips.
What I am noticing is that normalizing using Sox does not work independently for each channel.
In other words, if I normalize at -1db, only one channel is normalized to that level, but the other may be as much as 2db lower. Is there a way to compensate? (Audacity can work this way, but is useless for scripting).

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Martin Guy - 2025-07-10

You can split the track into separate channels, normalize each and then reunite them:

sox in.wav left.wav remix 1 norm sox in.wav right.wav remix 2 norm sox -M left.wav right.wav out.wav

There is also gain -n with -e or -B or -b to equalize all channels to the same maximum level. We could also add -e, -B and -b to the norm effect.
https://codeberg.org/sox_ng/sox_ng/issues/512

Last edit: Martin Guy 2025-07-10
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Can Normalization Be Dom Independently For Each Channel

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#234 Can Normalization Be Dom Independently For Each Channel

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