I'd like to apply vlevel to a file of mine. I'm pretty sure this will be simple enough

Document a simple way to vlevel-ize an audio file about vlevel HOT 2 OPEN

boyska commented on June 18, 2024

Document a simple way to vlevel-ize an audio file

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Comments (2)

mozlima commented on June 18, 2024

You can utilize any LADSPA-compatible software, such as Audacity or ffmpeg.

Example ffmpeg: vlevel-max.sh

#!/bin/bash
set -euo pipefail
if [ "$#" -eq 0 ]; then
    echo "Usage: $0 <input_file1> [<input_file2> ...]"
    exit 1
fi

filters=(
	"ladspa=vlevel-ladspa:vlevel_stereo:0.30|0.78|1|10|0"
)
filter=$(IFS=,; printf "%s" "${filters[*]}")

for path in "$@"; do
	ffmpeg -i "$path" -af "$filter" -vcodec copy  "${path%.*}.out.${path##*.}"
done

Additionally, you can incorporate other filters into your script, like the following:

filters=(
	"ladspa=vlevel-ladspa:vlevel_stereo:0.30|0.78|1|10|0"
	"ladspa=fast_lookahead_limiter_1913:fastLookaheadLimiter:0|-10|0.50"
)

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boyska commented on June 18, 2024

This works well!

While I agree this is pretty generic, and I could have come up with this on my own with some effort, I think it would be valuable to ship such a script.

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