Chris just sent me an another Spin FV-1 based layout. And he verified it.
"This is a layout for the Earthquaker Organizer Polyphonic Organ
Emulator that I drew up using the Pedalpcb schematic. Two things about
this layout (which is verified - I have all ready built it):
1) it addresses the volume drop issue that was common in early traces of
this circuit. The pedalpcb board now has a 20k trimpot to solve this,
which I have simply converted to the 20k resistor that is on pins 13 and
14 of the quad op amp.
2) you will need some supplies - an FV adapter and the EEPROM with the
algorithm - which I would recommend getting from pedalpcb. PCB Guitar
Mania makes a clone of this but I did not see a listing on their site
for an algorithm chip or an SMD adapter. The FV-1 adapter board that
pedalpcb makes is quite easy to use and I would also recommend watching
DK Pedals' tutorial on YouTube for soldering the FV-1, as it was very
helpful to me. The EEPROM algorithm chip is available for about $6.00
and if you search 'Organ Donor EEPROM' you will find it. It is not
listed on the regular EEPROM menu. Also - 2x14 rows of pin headers will
be needed to go between the adapter board and your vero."
