[sdiy] dsp box hacking?

[Sean Costello]

As far as DSP hacking for Ensoniq, you can find the programming manual for
the ESP2 DSP at http://grace.speakeasy.net/~dattorro/ESP2.pdf

>From a DSP perspective, this has got a LOT of interesting stuff, both from
an educational perspective as well as insider gossip. This document was
released in 1995, but much of Part III was republished by Jon Dattorro in
the Journal of the Audio Engineering Society in 1997, AFTER he had left
Ensoniq. Ensoniq sued, and lost, due to the fact that intellectual property
that is developed under "work for hire" in Pennsylvania is considered to be
the property of the inventor, and not just the company paying for the
development (IANAL, so this may be somewhat inaccurate, but this is the gist
of it). The document shows a reverb that was reverse engineered from a
Lexicon 224XL (this was relayed to me by a former Ensoniq employee) and
implemented in the Ensoniq DP/4, complete with all magic numbers. The AES
articles are no longer available from AES, undoubtedly due to the
controversy, but they are still available from Dattorro's website. The
internal documentation linked above goes into better detail than the AES
papers.

Sean Costello

----- Original Message ----- 
From: "dustin sedlacek" <dustin.sedlacek at gmail.com>

> The OS for the Ensoniq Mirage has been altered here isa good resource page
on it
> http://www.gweep.net/~shifty/music/mirage.html
>
> There is aslo a rewritten OS for the mirage called MASOS but i cannot
> seem to find information on that.
>
> To keep this on topic the Mirage has analog filters ;)
>
> There is also the Ensoniq ASR10 and EPS16+. A engineer Bill Mauchly
> wrote some new effets for these devices that load via floppy disks
> check
> http://www.waveboy.com/