[sdiy] Why no Roland filter clones?

[rob]

Hi folks,
I have been working on various Roland  filters and adding in some 
improvements:
These are the ones that are completed.

SH-5 diode ladder VCF, HPF and BPF
SH-3 Diode ladder LPF
SH-3A Moog transistor ladder LPF
Jupiter 8 IR3109 based LPF
Roland 100M BA6110 OTA LPF and HPF

Just completeing a design of Juno106 LPF/VCA and HPF based around 80017A 
chip.
And MKS80 IR3R05 VCF and VCA and Korg NJM2069 VCF/VCA.
And Roland 700 multi-mode filter using BA6110.

So ignoring the rare VCF chips like the IR3109, its still easy to make 
diode, moog and OTA versions.
I will post some samples of the filters once the web site has moved to a 
new domain in March.
I also plan to release all the AM 800 series PCB designs as open source 
for anyone to access.

The Roland SH-3/3A filters are very close copies of EMS and Moog, so I 
don't think they are copyright probelms with Roland on these 2 :-)
I will have some completed FracRac modules for sale later in the year 
too. Might do EuroRack too.

Regards - Rob
www.emulatorarchive.com