Circuitbenders Forum

Circuitbenders Forum => Drum machines => Circuitbending discussion => Korg => Topic started by: LoFi-Ninja on July 30, 2009, 03:00:17 AM

Title: Custom DDD-1 Roms
Post by: LoFi-Ninja on July 30, 2009, 03:00:17 AM

Looking at this site http://www.geocities.com/korgdddmods/index (http://www.geocities.com/korgdddmods/index)

It seems that making your own "rom cards" is rather straight foreward.

(http://www.geocities.com/korgdddmods/News_Update_files/DDDROMpcb1.jpg)
(http://www.geocities.com/korgdddmods/News_Update_files/ddd1romcard1.jpg)

The last update was almost 8 months ago so it seems this project is dead..

Can anyone shed some light on the preperations of the samples before they get burned to the EPPROM ? I'm guessing you might know something about this Gordon..

Title: Re: Custom DDD-1 Roms
Post by: Gordonjcp on July 30, 2009, 09:44:33 AM

Like most early digital drum machines, the samples are probably 8-bit, probably unsigned although they may use some oddball coding like µ-law (the Sequential Drumtraks has this).  If you can pull an existing ROM or even the internal one, it should be possible to work it out from that.

Title: Re: Custom DDD-1 Roms
Post by: LoFi-Ninja on July 30, 2009, 01:24:00 PM

I have a couple of the original cards.. How would one do that ? I have no experience with EPPROMS and the like..