[sdiy] TR909 clone PCB pictures

[Rob B]

Change 1 bit in the EEPROMS, or implement it differently, or use one BIG rom
and put all the sounds on the same rom and let a micro play it from memory
addresses (which I am actually surprised this wasn't done) , and you could
possibly get around it.

Better yet, change it to static ram and let the user change the sounds at
will, to anything they like! ;)

Rob

----- Original Message -----
From: "Colin Fraser" <colin at colinfraser.com>
To: <christian at dslab.com>; "'Trevor Page'" <trevor at resonance.fsnet.co.uk>;
"'synth diy'" <synth-diy at dropmix.xs4all.nl>
Sent: Tuesday, January 08, 2002 2:23 PM
Subject: RE: [sdiy] TR909 clone PCB pictures


> > -----Original Message-----
> > From: owner-synth-diy at dropmix.xs4all.nl
> > [mailto:owner-synth-diy at dropmix.xs4all.nl] On Behalf Of
> > Christian Oncken
> > Sent: 08 January 2002 17:31
> > To: Trevor Page; synth diy
> > Subject: RE: [sdiy] TR909 clone PCB pictures
> >
> > It seems that a plugin developer for a freeware DSP music
> > software called
> > BUZZ asked Roland for permission to replicate their 808 and
> > 909 in software
> > for his new freeware plugin.  He got permission for the 808,
> > but wasnt given
> > permission specifically for the 909.
>
> Most likely because the 909 uses sampled sounds for the hi-hats and
> cymbals which Roland have mechanical copyright over.
> They let you use these sounds in your own music, but not in hardware
> products.
>
> The 808 sounds are generated by circuits which are not protected in any
> way, except for the original schematics and PCB art.
> Roland couldn't refuse permission, as they have no legal basis to do so.
> Same applies to the analogue sounds in the 909.
>
> If they give Trevor any stick over using the original 909 samples, it
> would be easy enough for Trev to supply his boards either without
> EPROMS, or with re-synthesized samples which Roland would have no rights
> to.
>
> Colin f
>