Commodore SID Symphony II 6581 Cartridge

Commodore SID Symphony II 6581 Cartridge designed by Digital Audio Concepts

Commodore 64 Users who want to expand the sound capabilities have a new option. Adding a second SID to your 64 & 128 is as simple as it can be, insert your Commodore 6581 SID (not included) into the empty socket and plug into your Commodore 64. The interface works with any software which access between the $DE00 to $DFE0 address range (the address can be changed by moving a few simple DIP switches). Sized to fit standard Commodore 64/128 case shells (such as those sold by Protovision or Vesalia Online). Commodore 6581 SID is not included.

"The designer of the SID Symphony II, Vanessa Ezekowitz, was kind enough to furnish me with circuit diagrams of her SID expansions. There are internal and external expansions available, from her website Digital Audio Concepts:

http://digitalaudioconcepts.com/

Clones:

There are reports of a SID Symphony II cartridge, being sold by an ebay and are not to be confused fir the real Sid II.