Re: [LAU] Scalpel Audio Editor 0.8.0

Excerpts from Pierre's message of 2010-12-04 14:05:24 +0100:
> Scalpel is an audio editor for Linux written in Python. It aims at
> providing a simple-to-use and easy-to-extend audio editor. Sound
> hackers, get started translating your Matlab routines into Python/Numpy
> functions!
>
> Scalpel uses PyGTK for the user interface, Numpy for the internal
> processing, ALSA for the audio playing and libsndfile for reading and
> writing files. A minimal part of the code is written in Cython for
> better performance.
>
> Scalpel still has some rough edges but is quite usable. Try it now
> and be sure to send your feedback.
>
> Links:
>
> * Homepage: http://scalpelsound.online.fr
> * Source: http://gitorious.org/scalpel
> * Pypi: http://pypi.python.org/pypi/scalpel

Hi Pierre,
I just gave it a brief try, and as it happens ran into a imho major
problem. The .wav file I tried to open has just under 1GB. It took
Scalpel just a couple of seconds to chew up all memory it could get an
heavy swapping commenced (~80% of swap and it didn't stop). It seems to
need more memory than the 1GB (~500 memory + ~1.5GB swap). The net result
was that my machine wasn't particularly responsive anymore, and even less
so was Scalpel.
On the (kind of) positive side: Scalpel is in good company.
mhwaveedit, snd and rezound failed as well, but without chewing all
mem+swap. The former two seemed to do nothing at all and the later
presented an incomprehensible error.
audacity had no problem opening the file, only painting the waveform
took a while.
The DAWs I tried had no problem either (Traverso, Qtractor).
I know that so little memory is rather unusual, but I'm rather sure the
problem 'scales' well, more memory just needs bigger files.

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Received on Sun Dec 5 20:15:03 2010