[LAU] Fons could you make us an Hammond ;)

Joel Roth joelz at pobox.com
Tue May 19 22:59:06 EDT 2009

On Tue, May 19, 2009 at 11:45:11PM +0200, Fons Adriaensen wrote:
> On Tue, May 19, 2009 at 11:10:00AM -1000, Joel Roth wrote:
> > I understand that the formal way of going about that to
> > avoid copyright issues is the 'clean room' approach in which
> > one person (or group) reads the code and communicates to the
> > other who writes the equivalent functioning new code.
> Studying the way some software emulates a system does not
> necessarily provide correct information on what is being
> emulated, unless it is a complete and accurate physical
> model, which is unlikely.
> You may be able to find out some interesting parameter
> values but there it ends.
> For example the way Aeolus generates an organ pipe sound
> (additive synthesis and some postprocessing) has no
> relation at all to what happens in a real organ pipe
> (which is a complex non-linear and sometimes partially
> chaotic combination of an oscillatir and filter that
> are tightly coupled and influence each other).
> As an author of such software you make choices on how
> to do certain things, for all sort of reasons ranging
> from conceptual to very pragmatic. The latter may
> obfuscate things considerably, and provide the author's
> signature in a sense.
> If someone would write an organ synth by re-implementing
> the processing in Aeolus in entirely new code I would
> probably have no problem in detecting that quite soon,
> given the new code.
> Ciao,

What you say is true. The point I am making is that the
"new" code would not be under the copyright of your existing

Joel Roth

More information about the Linux-audio-user mailing list