Free download available here:
http://www.xs4all.nl/%7Eawolfe/a500tapes.htm
No details on the page as to exactly what this is or when it was recorded (am downloading the zip at the moment which may yield more information) but Legowelt's often spoken about how he still uses Octamed on Amigas, such as here:
http://www.xs4all.nl/%7Eawolfe/studioamiga.htm
He also appears to be using a C64 with a MSSIAH cart according to his studio page.
His Amiga Railroad Adventures CD from last year is bloody amazing. He's also doing a free show in London this Saturday!