Gcx gcp carvin legacy

Q & A for building and interfacing your rack gear with Ground Control Pro and GCX-based systems.
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Cmichaelis81
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Joined: Sun Oct 27, 2019 10:58 am

Bcc gcp

Post by Cmichaelis81 » Sun Oct 27, 2019 11:15 am

Trying to hook up four stomps front of amp g major back of the amp the problem is channel switching on my carvin legacy it just wants to turn on the reverb not switch channels

Cmichaelis81
Posts: 5
Joined: Sun Oct 27, 2019 10:58 am

Gcx gcp carvin legacy

Post by Cmichaelis81 » Mon Oct 28, 2019 5:33 am

In running an tc electronic g major and four stompboxes four romps in front of the amp tc in the when I plug a cable into the amp for channel switching all it does is turn on the reverb and not switch between the two channels can someone draw a diagram maybe I'm hooking up the cable wrong

nyteowl
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Re: Bcc gcp

Post by nyteowl » Tue Oct 29, 2019 3:31 am

Cmichaelis81 wrote:
Sun Oct 27, 2019 11:15 am
Trying to hook up four stomps front of amp g major back of the amp the problem is channel switching on my carvin legacy it just wants to turn on the reverb not switch channels
How are you trying to change Legacy channels, via the GCPro or via the G-Major Relays?
I am not affiliated with Voodoo Lab in any way, but enjoy sharing what little MIDI and signal routing knowledge I've picked up over the years. If you find my assistance helpful, please pay it forward.

nyteowl
Posts: 1385
Joined: Mon Jan 25, 2010 8:53 am

Re: Gcx gcp carvin legacy

Post by nyteowl » Tue Oct 29, 2019 3:33 am

Please see response in your other thread.
I am not affiliated with Voodoo Lab in any way, but enjoy sharing what little MIDI and signal routing knowledge I've picked up over the years. If you find my assistance helpful, please pay it forward.

Cmichaelis81
Posts: 5
Joined: Sun Oct 27, 2019 10:58 am

Re: Bcc gcp

Post by Cmichaelis81 » Tue Oct 29, 2019 2:30 pm

Through the gcp

JohnClark
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Re: Bcc gcp

Post by JohnClark » Tue Oct 29, 2019 6:17 pm

I merged the two threads so they are all together ;)

From your other thread I see you also have the GCX... are GCX any loops connected to the 1/4" Reverb Footswitch Jack on the back of the amp? If so, its probably best to disconnect this.

Also, exactly which model of Legacy amp is this?
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Cmichaelis81
Posts: 5
Joined: Sun Oct 27, 2019 10:58 am

Re: Gcx gcp carvin legacy

Post by Cmichaelis81 » Tue Nov 05, 2019 3:47 am

Legacy one

JohnClark
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Re: Gcx gcp carvin legacy

Post by JohnClark » Wed Nov 06, 2019 4:28 pm

OK, so the original Legacy amp used a TRS jack for the footswitch. To correctly control the footswitch functions you will need an Insert Point Cable. This is like a Y cable but it has a single TRS (stereo) end that breaks out to two TS (mono) ends, sometimes labeled "Tip" and "Ring". The TS ends will connect to the OUT/N.O. jacks of two GCX Loops (one to control the Channel A/B and the other to control the Reverb On/Off). The TRS end will connect to the amp's footswitch jack.

Here is a diagram that is quite similar to your setup with four pedals routed to the front of the amp using Loops 1-4, and has loops 7 & 8 controlling the footswitch functions using an Insert Point Cable.
http://www.voodoolab.com/gcxdiagrams/01 ... _AmpSw.pdf


Also, the original Legacy (models VL100/VL212) manual states the following about the footswitch jack...
Most foot pedals with 2 switches, a stereo cord and plug will work. First, the channel SELECT switch on the front panel must be selected to the “OUT” (channel 1) position before the footswitch will work. Now that you are connected correctly, the channels and reverb can be switched remotely.
Note: If a hum is heard in the speakers, the select switch is in the wrong position (this will not harm the amp).


Let us know how it goes!
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