[sdiy] ASM-1 ADSR

[J.D. McEachin]

At 05:34 AM 2/11/2012, Scott Young wrote:
>Jeffrey, see here - assume this is the same project?
>
>http://www.elby-designs.com/asm-1/asm1.htm

Yup, that's it.  I couldn't find anything there on the provenance of 
the ADSR circuit, though.  I checked in Electronotes, and the ASM-1 
ADSR doesn't look like the ENS-76 ADSRs.

For those wondering why I don't just buy an ASM-2 board, it's because 
I have a stuffed ASM-1 pcb, and it seems to me that it'll be easier 
to make a few mods to it to improve it than to desolder the expensive 
parts and stuff them in a new pcb.  My friend built 3 of them, and I 
think they sound pretty good.

Here's what I have in mind:

<http://www.synthcom.com/~jdm/diy/ASM_VCO2.GIF>http://www.synthcom.com/~jdm/diy/ASM_VCO2.GIF 


http://www.synthcom.com/~jdm/diy/ASM_VCF.GIF

<http://www.synthcom.com/~jdm/diy/ASM_ADSR.GIF>http://www.synthcom.com/~jdm/diy/ASM_ADSR.GIF 


I believe the glide, noise, and lfo would be more trouble than 
they're worth, so I've left them out.  I guess I'll find out if the 
rest of it is worth the trouble soon enough.  ;)

Jeffrey