Here's 13 1/2 minutes of what the DVL-1 can do. The inset video of the footswitch indicates what features are active.
R7 Goldtop straight into DVL-1. Checkerboard cab loaded with G12H 30 watts from early 70's.
Captured with R-122, SM57, Coles 4038 and AT 8022.
El Capistan in the loop, as always.
100 watt setting, no variac.
metropoulos.net