[lively-kernel] Lively Audio

Alessandro Warth alexwarth at gmail.com
Wed Apr 21 02:58:12 CEST 2010

> > >Chris Double wrote:
> > >...
> > >> Rendering MIDI data into audio (via Quicktime is the only current
> > >> solution there I suppose?)
> Can you say what you mean here?  Is there a simple way to call Quicktime
> from JavaScript to, eg, play F sharp in an oboe timbre for 0.8 seconds?

Not sure what Chris meant, but you could generate the contents of a midi
file in memory, then feed those bytes (after
to your platform's midi player (w/ the embed tag). Here's an example:

I doubt this approach would be useful for real-time stuff like making sounds
come out of your keyboard morph, but it's definitely worth knowing about.


> > > You can use HTML 5 audio via data URL's to generate sound and play it -
> > > although it's a bit of a pain doing it this way.
> Do you mean one data URL per note (88 of them), with no control over, eg,
> duration, pitch, etc?  Or is there something better?
> >There is work being
> > > done on working out an HTML audio generation API. See here for some
> >> discussion:
> >>
> >> https://bugzilla.mozilla.org/show_bug.cgi?id=490705
> >>
> >> If you generate the audio on the server and serve it as a WAV file then
> >> you can use HTML 5 audio to play it on recent Chrome, Safari, Opera and
> > > Firefox builds (I think all those support WAV).
> Can you say a bit more?  Can one serve up (or otherwise obtain) one .WAV
> file
> and then use that as a timbre by ASDR techniques so you can play all 88
> notes in various durations and volumes from that one file?
> Thanks in advance
>        - Dan
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