I am looking for a software that takes a list of files and their associated volumes and playtimes and renders a result. It could take as input something like XSPF, but XSPF works just sequentially, e.g.:

  1. A.mp3
  2. B.mp3
  3. C.mp3

whereas I'm looking for something that can read and render multiple audio files, starting from various points, with various volume envelopes... Basically the basic DAW-like operations:

  • A.wav (start at 0:05, ramp up volume to -4dB over 10s)
  • B.wav (start at 0:00, at full volume)
  • C.wav (start at 0:30, from 0:10, end after 5s)

I am imagining it would take an XML or otherwise machine-readable description, load these audio files and render them into a single resulting audiofile. Basically a very stripped down DAW that one can operate from CLI.

I know about https://github.com/jiaaro/pydub/ which is fairly close, but I would prefer not having to write any Python code myself, just present it with a list of operations.

2 Answers 2


The Wolfram Language provides built-in support for both programmatic and interactive audio processing, fully integrated with the Wolfram Language's powerful mathematical and algorithmic capabilities. You can create and import sound files, manipulate them with built-in functions, apply linear and nonlinear filters, and visualize them in any number of ways. See Wolfram Language Audio Basics Tutorial


You can, potentially do this all from the command line with FFMPEG - however the command line tends to be long and convoluted the Audio page gives some examples.

You could take a look at using the Audio part of MoviePy which is a pythonic wrapper for FFMPEG operations.

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