I wonder how close the RT-20 is to the rotary sound in the VF-1. The default slow sound on the VF-1 with or without the distortion engaged is very good. I would use my favourite distortion unit, but the OD sound is ok, sounds better when you’ve been using it a while and are starting to get hypnotized. You love Boss, all hail Roland.
Run it in STEREO, dammit.
Plug in the headphones for hours of self-indulgence.
That Slow Rotor sound, where it has similar controls to the RT-20:
The slow rotation speed is about 2 times for every 3 seconds, 0.65hz.
The fast rotation speed is 9hz.
The balance is 80% horn.
Overdrive is 60%, hard to say if that translates to 3 or 6.
Rise Time is 50%.
Effects Level is 100% and Depth is 20% for horn and 50% for rotor. I’m not sure how that would translate...Let’s read the manual!
https://static.roland.com/assets/media/pdf/RT-20_OM.pdf
The manual for the RT-20 shows it connected to the GT-8!
Oh, effects level is a master volume, so Direct would be all the way to the left.
This would be a Mode I sound, I think [the mic setting on the VF-1 is off-mic].
The manual says:
Mode I Leslie 122 with natural overdive.
Mode II same with the speaker on-mic, more tremolo effect.
Mode III Marshall 1959 distortion. That’s probably better.
Mode IV Univibe, balance control becomes intensity.