soundplayer

A very simple sampled sound file player written using FMOD Ex library, so can play WAV, MP3, OGG, and a lot more. Communicates via standard input.

So to compile, compile with FMOD Ex.

Building

The provided Makefile assumes that you put your FMOD Ex installation at /opt/fmodex.

Usage

This app receives commands from the standard input, and log messages to standard error.

Available commands are:

• s - stops all playing sound
• lPATH - loads the sample file at PATH but don't play it yet (won't load same file twice)
• pPATH - plays the loaded sample file at PATH (or load if it isn't already loaded)
• vVOLUME - sets the volume of the next sound to play (0.0 to 1.0, inclusive)

Example usage:

l/home/dtinth/wav/wav01.wav
p/home/dtinth/wav/wav01.wav
p/home/dtinth/wav/wav02.wav
s
p/home/dtinth/wav/wav03.wav
s

Why

So I can use it in other languages that requires playing sampled sound without fiddling to find a library that can play sounds well or try to learn to write a wrapper around some library. For example, using this, I can quickly program my own sampler, as simple as:

var stdin = process.openStdin();
require('tty').setRawMode(true);

function soundplayer() {
    var proc = require('child_process').spawn('/Users/dttvb/Projects/html5tnk/html5tnk/soundplayer');
    return {
        process: proc,
        load: function(file) { proc.stdin.write('l' + file + '\n'); },
        play: function(file) { proc.stdin.write('p' + file + '\n'); },
        quit: function(file) { proc.stdin.end(); }
    };
}

var p = soundplayer();
p.process.stderr.pipe(process.stderr);
p.process.stdout.pipe(process.stdout);
p.load('kick.wav');
p.load('hat.wav');
p.load('clap.wav');

process.stdin.on('keypress', function(chunk, key) {
    if (key.name == 'q') { p.quit(); process.exit(0); }
    if (key.name == 'd') p.play('kick.wav');
    if (key.name == 'f') p.play('clap.wav');
    if (key.name == 'j') p.play('clap.wav');
    if (key.name == 'k') p.play('hat.wav');
    console.log(key);
});