[Fwd: Fwd: MarcoHack Public Domain Macintosh PPC Software]

Subject: [Fwd: Fwd: MarcoHack Public Domain Macintosh PPC Software]
From: Rick (rick@uab.edu)
Date: Fri Jun 25 1999 - 06:20:13 EDT

-------- Original Message --------
Subject: Fwd: MarcoHack Public Domain Macintosh PPC Software
Date: Fri, 25 Jun 99 07:41:28 -0700
From: tom erbe <tre@shoko.calarts.edu>
Reply-To: freesound@shoko.calarts.edu
To: <freesound@shoko.calarts.edu>

---------------- Begin Forwarded Message ----------------
Date: Thu, 24 Jun 1999 17:38:19 -0400 (EDT)
From: ICMA <msimoni@umich.edu>
X-Sender: msimoni@qbert.rs.itd.umich.edu
To: icma@umich.edu
Subject: MarcoHack Public Domain Macintosh PPC Software

From: Paul Berg <paul@koncon.nl>


Version 1.02 of MarcoHack is now available for downloading at


MarcoHack is a freeware sound processing program for Macintosh PPC
computers developed by Marco Pranger at the Institute of Sonology, The

Using a SoundHack-style interface, sound files may be processed in a
number of ways:

1. The main feature of the program is a technique for separating an
audio signal into something which is called a source or excitation
signal and a resonance characteristic or filter. The excitation signal
and resonance characteristic are saved to separate files; the
excitation signal is saved as a normal audio file (AIFF) and the
resonance characteristic is saved as a file format which can only be
used by the program itself.

Within the program it is possible to recombine an excitation signal
with any resonance characteristic of your choice in order to create
'hybrid' sounds which combine distinct properties of two different
sounds into one. These 'hybrid' like sounds can have a very strong
quality of their own.

Furthermore, the program features a series of techniques for processing
the resonance characteristic itself, for example a technique which
creates a crossfade between two resonance charcateristics.

2. An improved technique for convolution which results in a better
sound quality in comparison to normal straightforward convolution

3. A technique for stretching sounds in an unfamiliar way which is
described by Trevor Wishart in his book Audible Design (Orpheus the
Pantomime 1994).

4. Several techniques for altering the harmonics of a sound which are
also described by Wishart, like stretching the spectrum in an
unfamiliar way or thinning the number of harmonics in the spectrum.

All processing techniques are explained in detail in the user manual
(PDF) which is included with the program.

----------------- End Forwarded Message -----------------

tom erbe | calarts | music | kcia | ceait
tre@shoko.calarts.edu | http://shoko.calarts.edu/~tre

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