[Impromptu] impromptu v2.0 released

[Andrew Sorensen]

Are you using a FireWire or USB  audio devices?

On 12/09/2009, at 4:48 AM, Michele Pasin <michele.pasin at kcl.ac.uk>  
wrote:

> Hi all,
>
> did anybody have any strange impromptu behavior after the latest OSX
> update?
>
> [http://www.flickr.com/photos/mikele/3907046949/sizes/l/]
>
> Basically, as soon as I launch the movie-capture function (see the
> screenshot) I start getting a never ending list of 'audio dropout'
> errors... as a result I have to stop the screencapture function and
> can't do any screen-casting anymore.
> I think it's caused by an OS update for I am actually using Impromptu
> 1.3 on that machine (an iMac, Intel Core Duo), and  the error started
> appearing only recently. I also tried using 1.5 and 2.0 ... same
> 'audio dropout' problem.
>
> what could it be?
>
> Curiously instead, on my macBookPro laptop (same OS, Intel Core 2 Duo)
> everything seems to work fine....
>
> thanks,
>
> Michele
>
>
>
> On 7 Sep 2009, at 09:13, Andrew Sorensen wrote:
>
>> Impromptu version 2.0 is now available for download at:
>> http://impromptu.moso.com.au/downloads.html
>>
>> Impromptu v2.0 is a major release with three significant  
>> architectural
>> changes.
>>
>> 1) A new impromptu x86 compiler
>> 2) Audio signal processing directly in Impromptu.
>> 3) A new concurrent garbage collector
>>
>> The new impromptu x86 compiler uses LLVM for backend code generation
>> and supports runtime compilation of scheme functions to x86 machine
>> code.  In particular the compiler has been added to impromptu to
>> support the efficient compilation of scheme code for data processing
>> tasks such as image processing, audio signal processing and OpenGL.
>> The compiler is exposed at runtime through the sys:compile call which
>> accepts a scheme closure and returns a foreign function which may be
>> called freely from scheme.  (help sys:compile #t) will give you a
>> bunch of examples.
>>
>> On-the-fly audio DSP programming is now supported directly within the
>> impromptu scheme environment by allowing x86 code (i.e. compiled
>> scheme code) to be hot-swapped into the kernel of a custom code
>> AudioUnit.  You may use one or more of these custom code audiounits
>> anywhere in your audiounit chain - as both generators and or effects.
>> Code is hot-swapped into an AU kernel by passing a given scheme
>> closure to the au:code:load function.  There is also a mechanism for
>> sharing memory between the AU and the scheme runtime. (help
>> au:code:load #t) will give you a bunch of examples.
>>
>> The primary motivation for the new GC is to provide greater
>> performance with larger heap sizes.
>>
>> v2.0 also adds support for Snow Leopard but is no longer provided  
>> as a
>> Universal Binary.  Intel only from v2.0 forward.
>>
>> A brief screen-cast demonstrating the new on-the-fly audio
>> functionality can be found at: http://www.vimeo.com/6096554
>>
>> Cheers,
>> Andrew.
>> _______________________________________________
>> Impromptu mailing list
>> Impromptu at lists.moso.com.au
>> http://lists.moso.com.au/mailman/listinfo/impromptu
>
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>
> ____________________________
> Dr. Michele Pasin, Researcher
> Centre for Computing in the Humanities
> King's College, London
> http://staff.cch.kcl.ac.uk/~mpasin/
>
>
>
>
>
>
>
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