I have been wanting to add individual outputs to the TR-505 for quite some time and after I  installed the HKA Rom Expansion I did so. I found this page and followed the instructions on it to build in the individual outs. After some testing I soon found out that the mod did not fully meet my expectations. The culprit of the remaining original mods is that for the most important sounds, the volume envelope is bypassed, thereby introducing digital grit into the sound decay. Continue reading →