Drive settings for the
Original DS-1 (lowest settings, full volume):
- Effect Type: ProCo Rat
- Drive: 1.9
- Tone: 4
- Low Cut: 150
- High Cut: 15000
- Clip Type: 4558/Diode
- Bias: 0.05
- Bass: 12
- Mid: 450Hz, 4dB
- Treble: -3
- Level: 5
Notes:
- I'd say this is about 95% accurate. The only thing that's different is full gain isn't as light sounding. You can try dropping more bass, but it's still not exactly the same
- max tone is Tone:10, Bass:-9, Mid:2, Treble:5
- max drive is Drive:8
The Robert Keeley version has 2 modes, accessed via a switch. Up is the original SEM (seeing eye mod) mode and down is the newer ULTRA SEM mode. ULTRA SEM mode was mainly intended to replicate the sound of a Marshall amp, so it may not be as useful.
The chain looks like this:
Filter->Drive
Filter settings:
- Type: Lowshelf
- Gain: 3 (4 for ULTRA SEM)
- Frequency: 300
- Q: 0.7
Drive settings for
SEM mode (lowest settings, full volume):
- Effect Type: ProCo Rat
- Drive: 1.9
- Tone: 4
- Low Cut: 150
- High Cut: 15000
- Clip Type: 4558/Diode
- Bias: 0.05
- Bass: 12
- Mid: 450Hz, 4dB
- Treble: -3
- Level: 6
Drive settings for
ULTRA SEM mode (lowest settings, full volume):
- Effect Type: ProCo Rat
- Drive: 2.3
- Tone: 2.25
- Low Cut: 150
- High Cut: 15000
- Clip Type: 4558/Diode
- Bias: 0.4
- Bass: 12
- Mid: 450Hz, 5dB
- Treble: 0
- Level: 6
Notes:
- SEM mode is about 95–100% accurate, whereas ULTRA SEM mode is about 90–95% accurate
- SEM mode max tone is Tone:10, Bass:-12, Treble:12, and the Filter's Gain at 1dB
- SEM mode max drive is Drive:8
- ULTRA SEM mode max tone is Tone:10, Bass:-6, Mid:2, Treble:7, and the Filter's Gain at 2dB
- ULTRA SEM mode max drive is Drive:7
A good experiment would be to try out how Steve Vai and Joe Satriani mainly use this pedal, which is simply as a boost. Just use the minimum settings in SEM mode with full volume (which, on the actual pedal would be tone:0 distortion:0 and level:10).
I've had these pedals a long time and don't use them anymore, but figured I'd reproduce their sounds before gettin' rid of 'em.