Re: [Newbies] sound and squeak / siren

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Re: [Newbies] sound and squeak / siren

Brad Fuller-3
jacob remin wrote:
> hello (and merry xmas!),
> i am interested in building a simple experimental musical instrument. i
> am wondering where to look for nice packages of functionality.

What about building on the built-in FM synthesizer? It'd be nice to have
an FM editor.

> i am interested in some quite basic functions:
> - sampling/recording sound
> - sample playback

Rudimentary audio playback and recording is built in but it could be
improved upon. Open a class browser and use the "find class..." function
and search on "sound". You'll see a lot of classes.

> - filtering (VST plugin support?)

There is no VST support. It'd great to have, but you'd have to create a
VM plugin.

> - MIDI support

There is some MIDI support built in. and there are other's on this list
that have expanded it. Try going to a class browser and using the "find
class..." function and type "midi". There are several MIDI classes. See
SimpleMIDIPort for a start.

> - audio visualization

Don't know of anyone doing work like this. It'd be interesting, though.

> can you point me in the right direction?
> so far, i have stumbled upon siren and um0, but are having some troubles
> installing them:
> it seems siren is only for visual works? i have downloaded the smalltalk
> package from the siren homepage , but
> is this importable to/compatible with squeak (and how?)

Siren on squeak is rather old - it ran on squeak v3.0. I don't know if
it has been updated. if you look back into the archives of
you'll see Mr. Pope left Squeak for VW and then abandoned VW back in
2004. I've copied this message to the Squeak Audio mailing list so that
Stephen can reply as to the current status. Here are his old messages:

on 07/14/04 Stephen Travis Pope wrote:

> Hello all,
> The last version of Siren that ran on Squeak was 3.0, released on WWW
> and CR-ROM in February, 2001. I haven't fololwed the evolution of the
> Squeak audio classes since then. The new Siren version 7.2 is built on
> VisualWorks 7.2. I have a PortAudio streaming audio I/O
> interface (using
> DLLCC), but it has problems with callbacks for small buffers. (The
> VisualWorks  DLLCC interfaces to PortMIDI, LibSndFile, and
> FFTW all work
> fine.) I use Siren with MIDI and OSC, and with sound file I/O, so I
> haven't fixed this yet. The source is complete, but it
> has to be changed
> to use message-sends, I think (any hints here?).
> A Squeak-to-PortAudio API would be a cinch to build; look at the
> PortAudio tutorial example.
> stp

and then:

on 11/04/05 Stephen Travis Pope wrote:

> I guess the first comment should be that the VW interface doesn't work
> reliably and has been adandoned. I'll describe it and explain.
> In VW, you can use the DLLCC (dynamic linked library and
> C connect) API
> to link ST80 with external APIs. It's supposedly easier
> to use than the
> user primitives interface. The tool can parse a C header
> file and create
> a Smalltalk mirror class with glue code for calling the C functions.
> Users can write C code that signals Smalltalk semaphores or creates
> other callbacks.
> The PortAudio API is based on registering a callback function
> with the
> sound driver; this gets called for every buffer of output,
> i.e., on the
> order of every couple msec or so. In a well-behaved app., the callback
> simply  copies sample data from a stored buffer into the requested
> buffer, signals the "producer" thread, and returns. I think
> that the VW
> semaphore mechanism is too slow for this, but never got around to
> tracing it more closely. My work in ST80 is mainly about controlling
> external synthesis SW from Smalltalk, meaning that we use the
> OpenSoundControl protocol (OSC) to control synthesis servers,
> instead of
> doing the synthesis and sound output from ST. This is why I never
> finished the sound IO stuff, though it would be really interesting to
> have working...
> <---snip---->
> stp

> um0 downloads nicely with the squeakmap package loader, but gives me an
> error during install: can't find EOCD position. what to do?

I don't know what um0 is and I don't see it in squeakmap. What is it?

brad fuller
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Re: Re: [Newbies] sound and squeak / siren

Stéphane Rollandin

>> um0 downloads nicely with the squeakmap package loader, but gives me
>> an error during install: can't find EOCD position. what to do?

there's a problem locating a required package. I have to check this up.

currently you should go to this page:

and follow point (2) so you will have the packages already cached in a
local /sm folder. then the installation should proceed smoothly.

please let me know of any trouble.

> I don't know what um0 is and I don't see it in squeakmap. What is it?

muO (or µO) is an environment for experimental musical composition.
still in developement but already fun enough I believe.


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