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Author Topic: Digitech GSP21 Legend  (Read 73 times)

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Chip Roberts

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Digitech GSP21 Legend
« on: Time Format »

Just picked up one of these guys for dirt cheap $30 USD the other day to use as a backup rig.  This thing is pretty insane in terms of the parameters, too much, in fact.  My question to you guys is, how would you recommend setting this up?  Currently I have the MP1 going out in mono to the input of the GSP21, then into power amp; real simple setup.  The problem I'm having is that my MP1 is either overloading the Digitech, or there's an imbalance between the volume when bypassed vs. on.
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Rack of Death:
MP1 v1.38/Alesis Midiverb II/Marshall Valvestate 8004

Rack of Back:
MP1 v2.01/Digitech GSP21 Legend/MosValve 1160

Pedalboard:
Boss TU2, Mooer Pitchbox, Boss BF2, Boss CE5, MXR EVH Phase 90, Behringer HB01 Wah/Digitech Control 7/

Cabinet:
Custom 2X12 with WGS Retro 30/HM75

Guitars:
Gibson Custom Shop Flying V - Dimarzio X2Ns
Gibson Les Paul Standard - Dimarzio Crunch Lab/Tone Zone
Gibson Custom Shop Explorer - Dimarzio MegaDrive/Air Norton
CC Clarke Superstrat - Dimarzio Evolution
No-Name Superstrat - Dimarzio Steve's Special/HS4/HS4
Ovation Matrix
Ibanez AC130
Washburn Lyon LB21

Other Rack Gear:
Peavey TG Raxx
Yamaha SPX90II

Other Pedals:
Morley Bad Horsie 2
Boss NS2
Digitech Whammy

Wishlist:
Carvin X100B
Laney AOR
Marshall JCM800
Marshall Jubilee
ADA Microtube 100
Roland GP8
Rocktron Intellifex Blackface
Lee Jackson SP1000

rnolan

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Re: Digitech GSP21 Legend
« Reply #1 on: Time Format »

I don't know much about the GSP21 except for a quick glance at the manual.  Seems it's a mono in, stereo out device so the best way to use it would be with a small stereo mixer and feed it from one FX/Aux send and bring the stereo returns into 2 channels panned hard left/right (and the MP1 A/B outs into 2 channels sending both to the GSP21 on the FX/aux send), mix that together (GSP full wet) and then into stereo power amp into 2 cabs.
Alternately you could use it in the MP-1 loop but it would be mono and you'd have to balance the wet/dry mix via the GSP's wet/dry mix knob. This would be mono and not sound as good as using a mixer.  If you are not running your MP-1 in stereo then you are seriously missing out on it's full potential. Also the reverb etc fx in the GSP will sound much better in stereo.
The overloading is most probably because you haven't got the gain structure (GSP input output levels right).  It will probably be capable of taking a line level signal (around 1 volt) or an instrument level (millivolts) signal on its input.  MP-1 out is line level, the MP-1 loop can be adjusted from instrument level to line level and then fine tuned with the GSP input and output levels.
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Studio Rig: MP2/MB1 > Eurorack UB2442FX-Pro > TC M-One XL > Behringer Truths (with Truth Sub) / QUAD ESL 63s
Live Rig: MP2/MB1 > Alesis Quadverb > Alesis Midiverb 4 > Yamaha AM802 > B200s/Carvin TS100/DCM200L > ADA Split Stacks/Mesa P112s

Chip Roberts

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Re: Digitech GSP21 Legend
« Reply #2 on: Time Format »

I guess a better question would be how do you set your levels?
Logged
Rack of Death:
MP1 v1.38/Alesis Midiverb II/Marshall Valvestate 8004

Rack of Back:
MP1 v2.01/Digitech GSP21 Legend/MosValve 1160

Pedalboard:
Boss TU2, Mooer Pitchbox, Boss BF2, Boss CE5, MXR EVH Phase 90, Behringer HB01 Wah/Digitech Control 7/

Cabinet:
Custom 2X12 with WGS Retro 30/HM75

Guitars:
Gibson Custom Shop Flying V - Dimarzio X2Ns
Gibson Les Paul Standard - Dimarzio Crunch Lab/Tone Zone
Gibson Custom Shop Explorer - Dimarzio MegaDrive/Air Norton
CC Clarke Superstrat - Dimarzio Evolution
No-Name Superstrat - Dimarzio Steve's Special/HS4/HS4
Ovation Matrix
Ibanez AC130
Washburn Lyon LB21

Other Rack Gear:
Peavey TG Raxx
Yamaha SPX90II

Other Pedals:
Morley Bad Horsie 2
Boss NS2
Digitech Whammy

Wishlist:
Carvin X100B
Laney AOR
Marshall JCM800
Marshall Jubilee
ADA Microtube 100
Roland GP8
Rocktron Intellifex Blackface
Lee Jackson SP1000
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