Cool! But from a musician point of view, it'd be better if the sound would only kick in at the next pattern entry.

At the moment it just seems to just turn off mute.

Then you could add live loading of samples, panning, fades in etc. :-)

Ha, yes, I'd love to do some of that! Actually, having the sound come in on the next loop should be fairly easy - you can just give a start time in the web audio api for when the sample should play.

If you're interested, feel free to leave an issue (or a pull request!) and I'll take a look!

On Firefox 37.0.2:

    The buffer passed to decodeAudioData contains invalid content which cannot be decoded successfully.
    EncodingError: The given encoding is not supported.

And nothing plays when pressing any button. :(

Seems to be working fine on my Firefox (same version) on Windows.

Oh, I'm sorry to hear that. What OS are you running? And can you play other mp3 files in your browser?

Works for me on Firefox Developer Edition on OSX.

I was expecting to be able to record myself in each grid tile.

Good chiptune! I want to play the tracks myself.

Really fun.. spent some time mixing a song. :)

Doesn't work for me.