soundfont2mp3's Introduction

soundfont2mp3

soundfont2mp3 is a command line utility that lets you extract single note mp3s from soundfont files.

Installation

Install the command line tool globally by running:

npm install -g soundfont2mp3

Usage

Usage: soundfont2mp3 [options]

Options

-h, --help                     output usage information
-v, --version                  output the version number
-c, --channel <channel>        the midi channel
-i, --instrument <instrument>  the midi instrument
-n, --note <note>              the midi note to export
-d, --duration <duration>      the duration of the note in ticks. there are
                               128 ticks per beat, so a quarter note has a
                               duration of 128.
-v, --velocity <velocity>      the velocity of the note
-g, --gain <gain>              the velocity of the note
-e, --endtick <endtick>        the tick number of the end of the track
-s, --soundfont <soundfont>    the soundfont file
-o, --output <output>          the .mp3/.wav/.js/.mid file to output
--no-reverb                    don't add reverb
--no-chorus                    don't add chorus

Dependencies

FluidSynth
Lame
Sox
A valid soundfont file (see Free Soundfonts)

Free Soundfonts

S. Christian Collins GeneralUser GS - 30 MB
Fluid (R3) General MIDI SoundFont (GM) - 140 MB

Example Usage

#!/bin/bash
BASE_FOLDER="."
SOUNDFONT="./gs.sf2"

# make channel folder
mkdir -p "$BASE_FOLDER/channel"
mkdir -p "$BASE_FOLDER/channel/0"
mkdir -p "$BASE_FOLDER/channel/0/instrument"

for i in {0..127}
do
	mkdir -p "$BASE_FOLDER/channel/0/instrument/$i";
	for j in {0..127}
	do
		soundfont2mp3 -i $i -n $j -s "$SOUNDFONT" -o "$BASE_FOLDER/channel/0/instrument/$i/$j.mp3"
	done
done

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soundfont2mp3's Issues

Investigate JS bindings for external dependencies

Possibly look into JS bindings for SoX/FluidSynth/Lame to avoid having to use execFile and possibly reduce external dependencies. Some results from cursory Googling (not tested any of these):

SoX: https://github.com/substack/node-sox -- Node.js bindings
FluidSynth: https://github.com/jet2jet/js-synthesizer uses a WebAssembly version of FluidSynth, apparently (interesting, but possibly not what this project needs)
Lame: https://github.com/zhuker/lamejs

Provide JS API

It would be great to have a Javascript API for this, so that we could script it from JS/Typescript code without having to spawn a new Node process for each conversion.

It would be great to be able to generate multiple note files at once, rather than having to run 1 process for each note. I don't know whether the dependencies (such as Fluidsynth) support that, but it's something to investigate.

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