RM 1250 + duals midi switching

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max44
RM50
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Joined: Mon Jul 17, 2017 8:13 am
Location: Nantes - FRANCE

RM 1250 + duals midi switching

Post by max44 » Thu Jul 05, 2018 11:10 am

Hello MTS users,

I just got (lucky to get) a Randall RM 1250,
On top of that I use my 12 dual modules in it, so it is a perfect world !
The original footswitch works fine but has only 3 buttons, so each button switches 8 channels : 1-8 / 9-16 / 17- 24 (not useable live ...)

I have a G Lab GSC2 midi footswitch that I try to configure with the RM1250 and the duals, without success yet : if anyone can help that would be great

Thanks, Max
Egnater M4
Randall RT2/50 & RM1250
Dual modules
Home crafted guitars

Mattfig
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Post by Mattfig » Thu Jul 05, 2018 11:15 am

The MIDI on the 1250 is not workable like standard MIDI. I don't know if it's simply reduced to using a three button switch or what but I tried lots of MIDI stuff with no success with 1250....

Great score though!
Matt Fig -
MotorCity Mods
www.motorcitymods.com

Kemper Profiles -
www.mattfig.com

JayDA
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Post by JayDA » Thu Jul 05, 2018 11:37 am

I don't think it's actually MIDI, it may use a MIDI cable...but all I could ever get mine to do was cycle through channels like you're describing.

max44
RM50
Posts: 81
Joined: Mon Jul 17, 2017 8:13 am
Location: Nantes - FRANCE

Post by max44 » Thu Jul 05, 2018 1:09 pm

Thanks guys,
I guess it was designed only for studio work then ...
I can live with it, just have to be super fast with my feet to change channels if I wish to use it live !
Matt fig :Yeah it is quite a beast and I would add : if amps were engines this would be The V12 of all amps
Jayda : I still have your fog lifted RT2/50 and it still sounds awesome
Max
Egnater M4
Randall RT2/50 & RM1250
Dual modules
Home crafted guitars

JayDA
Lynch Box
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Location: Dirty Jersey

Post by JayDA » Thu Jul 05, 2018 1:13 pm

max44 wrote: Jayda : I still have your fog lifted RT2/50 and it still sounds awesome
That was a GREAT amp, so much so that every time I see one for sale I want to buy another one and have it modded. I'm glad you're enjoying it!

max44
RM50
Posts: 81
Joined: Mon Jul 17, 2017 8:13 am
Location: Nantes - FRANCE

Post by max44 » Sat Jul 07, 2018 2:36 am

Jayda : Yes it is a great amp ... even in stock form since it has Heyboers transformers (as explained by Rob from Jaded Faith)
The Foglift + NFB pot add even more articulation !

On the other hand the RM1250 has chinese transformers (made in Taiwan actually) and I can clearly tell the sound is different and feels less powerful ...
I'm actually talking with Rob to improve the RM1250 in a simple way : Foglift and things like that, as changing the transformers on this beast would be too much of a hassle (Rob has done it in the past but it was a pain of a job apparently)

Back to topic : I have talked to Galao (who provides the dual channel modification midi kit) and he told me the RM1250 has midi connections, but is not programmable and only reacts to CC# (Continuous Control messages) so it means it can be controlled, but only with a programmable Midi footswitch (i.e. Roland FC 300, Behringer FC1010 for instance)
I have asked GLab to help me out with this, expecting their answer and will let you know
Max
Egnater M4
Randall RT2/50 & RM1250
Dual modules
Home crafted guitars

warmachine67
RM100
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Location: Alabama

Post by warmachine67 » Sat Jul 07, 2018 6:24 am

If you do have any success with cracking the midi code on the 1250, please report it here.

As for mods, just sending Rob the board and having a normal foglifter mod will be the biggest bang for your buck when shipping is considered. I think the stock presence board on a 1250 is one of the biggest reasons they don’t sound as good.

max44
RM50
Posts: 81
Joined: Mon Jul 17, 2017 8:13 am
Location: Nantes - FRANCE

Post by max44 » Sat Jul 07, 2018 1:03 pm

Problem solved :

Thanks to Galao who pushed me going through my GLab Gsc2 manual - concerning the CC# setup - I finally manage to set it up with the RM1250

So for those who care : your midi pedalboard / footswitch has to be programmable (able to send CC messages), and has to send messages on midi 1 channel only (RM1250 is setup on midi 1 channel)

For single modules the RM1250 will recognize the following CC# :
(as listed in the RM1250 manual)
- module 1 : CC# 1
- module 2 : CC# 6
- module 3 : CC# 7
- module 4 : CC# 8
- module 5 : CC# 9
- module 6 : CC# 14
- module 7 : CC# 15
- module 8 : CC# 16
- module 9 : CC# 17
- module 10 : CC# 22
- module 11 : CC# 23
- module 12 : CC# 24

For dual modules the RM1250 will recognize the following CC# :

- module 1 channel A : CC# 5
- module 1 channel B : CC# 1
- module 2 channel A : CC# 6
- module 2 channel B : CC# 2
- module 3 channel A : CC# 7
- module 3 channel B : CC# 3
- module 4 channel A : CC# 8
- module 4 channel B : CC# 4
- module 5 channel A : CC# 13
- module 5 channel B : CC# 9
- module 6 channel A : CC# 14
- module 6 channel B : CC# 10
- module 7 channel A : CC# 15
- module 7 channel B : CC# 11
- module 8 channel A : CC# 16
- module 8 channel B : CC# 12
- module 9 channel A : CC# 21
- module 9 channel B : CC# 17
- module 10 channel A : CC# 22
- module 10 channel B : CC# 18
- module 11 channel A : CC# 23
- module 11 channel B : CC# 19
- module 12 channel A : CC# 24
- module 12 channel B : CC# 20

Strangely enough single modules' CC# don't always correspond with channel A's dual modules' CC# ... So I guess if one changes from single to duals, one will recall channel A's dual modules for the same preset only in slots 2 - 3 - 4 - 6 - 7 - 8 - 10 - 11 - 12
(and channel B's dual modules for the same preset in slots 1 - 5 - 9)

Weird ! and I hope I made myself understandable ...

(I only own dual modules, no singles, so I could not compare : this is only a guess ...)

Have fun !
Max
Last edited by max44 on Sun Jul 08, 2018 5:07 am, edited 1 time in total.
Egnater M4
Randall RT2/50 & RM1250
Dual modules
Home crafted guitars

maxxstock
RM100
Posts: 123
Joined: Tue Jan 21, 2014 6:54 am
Location: EU

Post by maxxstock » Sat Jul 07, 2018 1:23 pm

Max, you say amazing things !!!

I did not know if the 1250 can accept dual modules (a / b channels).

Did you make mods on this amplifier or not?

Thank you!

Max
The aim and final end of all music should be none other than the glory of God and the refreshment of the soul.
"Johann Sebastian Bach"

warmachine67
RM100
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Joined: Thu Apr 20, 2017 7:44 pm
Location: Alabama

Post by warmachine67 » Sat Jul 07, 2018 1:40 pm

The 1250 can accept duals without any modification, somehow it came from the factory that way.

Max44, many thanks for that cc# info. I’ve been pondering what to do since I got the synergy duals running in mine. Sounds like I just need to get a behringer or Roland midi foot controller now.

max44
RM50
Posts: 81
Joined: Mon Jul 17, 2017 8:13 am
Location: Nantes - FRANCE

Post by max44 » Sat Jul 07, 2018 1:43 pm

Hey Maxx !

The RM1250 accepts dual channel modules in stock form,
It was actually the only MTS product in the Randall line to do so I guess ...

Cheers, Max
Egnater M4
Randall RT2/50 & RM1250
Dual modules
Home crafted guitars

max44
RM50
Posts: 81
Joined: Mon Jul 17, 2017 8:13 am
Location: Nantes - FRANCE

Post by max44 » Sat Jul 07, 2018 1:49 pm

Warmachine67 : You're welcome !

I only own dual modules, that's why I bought this RM1250 cause I knew it would play and switch both channels ... the only issue was that midi setting : now we know this beast can be controlled conveniently (i.e live !) with an adequate midi footswitch and this is great news

Quote : " As for mods, just sending Rob the board and having a normal foglifter mod will be the biggest bang for your buck when shipping is considered. I think the stock presence board on a 1250 is one of the biggest reasons they don’t sound as good "

I will definitely think about this ... thanks
Max
Egnater M4
Randall RT2/50 & RM1250
Dual modules
Home crafted guitars

warmachine67
RM100
Posts: 121
Joined: Thu Apr 20, 2017 7:44 pm
Location: Alabama

Post by warmachine67 » Sun Jul 08, 2018 9:08 am

Not trying to hijack the topic, but since midi Jedi masters are participating:), any idea if a Rocktron Midimate could be used with the 1250 for dual CC access?

I just don’t have enough midi knowledge to read the manual online and know if it will work. The midimate is cheaper than the Roland and has a smaller size without the two cc pedals, that’s why I’m wondering.

galao
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Post by galao » Sun Jul 08, 2018 12:47 pm

As a MIDI-Jedi I can confirm that the Midimate is also fine for this purpose. It can send programmable CC-messages and can be phantom powered over a seven-pin-MIDI-cable, which is a plus. I just don´t like to read manuals for other people to give them step-by-step-instructions except they have questions about my products. :D
DUAL CHANNEL MODS
https://yuneo.de

warmachine67
RM100
Posts: 121
Joined: Thu Apr 20, 2017 7:44 pm
Location: Alabama

Post by warmachine67 » Sun Jul 08, 2018 4:21 pm

Many thanks galao, I don’t mind diving in and figuring it out, just wanted to make sure it’s the right rabbit hole.

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