Audio Glitch - produce sliced and spliced WAVs from MIDI beats or a list of times

Description

Cyclically slices and splices any number of supplied wave files (wav) at the points specified by midi, which may be:

• either at the fractions of seconds specified
• or at points specified by a MIDI file's track 0 note-on events, regardless of channel.

A command line interface and API are provided, along with an example. Arguments are the same for all.

Synopsis

API

import  MIDIslicer from './src/slicer';

// Taking beats from a MIDI file:
const args = {
  verbose: true,
  bpm: 100,
  midi: 'eg/test.mid',
  wav: ['eg/0.wav', 'eg/1.wav', 'eg/2.wav'],
  output: 'eg/output.wav'
};

// Supplying beats directly
const args = {
  verbose: true,
  bpm: 100,
  midi: [1, 1, 1, 1],
  wav: ['eg/0.wav', 'eg/1.wav', 'eg/2.wav'],
  output: 'eg/output.wav'
};

new MIDIslicer(args)
  .slice()
  .then(finalPath => {
    console.info('Glitch file saved at %s.', finalPath);
  });

CLI

glitch --midi eg/test.mid \ 
       --wav eg/0.wav     \
       --wav eg/1.wav     \
       --wav eg/2.wav     \
       --bpm 127

bpm

(Number) MIDI does not provide this, so you must.

midi

(String|Array) Source of beats at which to chop the audio: if a string, path to the MIDI file; if an array, a list of timings

wav

(Array|String>) One or more paths to wave files.

output

(String) Path at which to output the generated wave file. Defaults to the MIDI file input path concatinated with `_glitch.wav`, or if no MIDI file was supplied, defaults to `glitch.wav`.

verbose

(Boolean) Logging

Examples

Run examples with node eg or npm run eg

Caveats

All wave files should be of the same duration, same sample rate, bit depth, number of channels. I have no plan to update this, since I produce my wavs at the same time from the same source.

Acknowledgements

Based in part on the work of David Poirier-Quinot in node-audio-slicer.

Changes

2022-06-10 - updated this documentation and `package.json``.