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 MIDI connection between processors
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FRANZONI
Double Platinum Member

Ireland
3543 Posts

Posted - 07/26/2008 :  07:38:20  Show Profile  Visit FRANZONI's Homepage  Reply with Quote
Hi all

Even though i have had a couple of different procesors in my time ,i never needed to connect them together basically what i might have to do is get a harmonizer or something like the Boss sx 700 that has a harmonizer patch...could i loop it with my XTpro throught the pods stereo effects loop and and control changing patches on both with MIDI..so if i switch a certain patch on the pod it will bring in the harmonizer on that number...is there much setting up to do this as in programming which i heard can be a pain in the ass..?..

Edited by - FRANZONI on 07/26/2008 07:39:09

FRANZONI
Double Platinum Member

Ireland
3543 Posts

Posted - 07/27/2008 :  17:38:37  Show Profile  Visit FRANZONI's Homepage  Reply with Quote
Probably a bad place to ask this question as were all pedal freaks here... but is there no one using a rack as well....??...........
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Dr. Bob
Moderator

Australia
6593 Posts

Posted - 07/27/2008 :  18:04:59  Show Profile  Visit Dr. Bob's Homepage  Reply with Quote
Hi FRANZONI

MIDI isn't really a PITA, it's more of a logistical nightmare.
I had a massive MIDI setup in my old studio, some 10-15 or so years ago, with MIDI patchbays & MIDI switches, & a few miles of hand built MIDI cables.

I was thinking about his question for quite a while, & was wondering if, or how to reply.

If you want to have an off line discussion about this, you're welcome to PM me.

From what I understand.
In your case, you will be switching two different pieces of equipment, and two different patch numbers?
Correct me if I have misunderstood, what you are trying to archive.

You might have do do a simple sketch of what you are trying to do.

Some Boss multi-effects, GT-3-5-6-8-10 -- & I think the ME20-50 have MIDI out,
and can sometimes be put to good use in such cases.

What MIDI switcher do you have, if any?

Regards Dr. Bob
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Laurie
Double Platinum Member

Canada
4854 Posts

Posted - 08/03/2008 :  15:07:41  Show Profile  Visit Laurie's Homepage  Reply with Quote
Hey Franzoni, in another incarnation I used to be a programmer in an Acid House band... I can give you some pointers on the evils of MIDI in PM too if you like

Have you had a look at the MIDI Protcol specicifation yet? Heavy going, but worth it as background info:
http://en.wikipedia.org/wiki/The_MIDI_1.0_Protocol
http://www.midi.org/aboutmidi/tutorials.php

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the-destructor
Silver Member

USA
334 Posts

Posted - 08/05/2008 :  23:19:57  Show Profile  Reply with Quote
Hi Franzoni,
As far as I understand you, If you have a midi "thru" or "out", you can daisychain as many devices as you want. I currently have 4 units chained together. As far as I know, the program # is the program #. If you jump to 73, everything jumps to that program, although I'm sure there is a way around it. Everything on the same "midi channel" so everyone talks to each other.
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Dr. Bob
Moderator

Australia
6593 Posts

Posted - 08/06/2008 :  09:32:47  Show Profile  Visit Dr. Bob's Homepage  Reply with Quote
Hi Guys

If you read the MIDI specs, & the specs on the opto-couplers they use.
You will see that there is approx, 3mS to 5mS delay in the opto, on every MIDI jump.

Therefore if you daisy chain 3 devices, you will get up to 15mS of delay.
That's why, they recommend that your Drum computer or time critical synth. or controller, is in the first MIDI link.

I used to have the Roland TR-707 & other drum computers, on the first MIDI link-jump, & then I had MIDI splitters (like a 1 in 4 out box),
after the drum computer, off the Thru port, & that way, it created a star rather than a daisy chain,

With the Star config., all the other devices where at the same MIDI delay time.

Of course you could run the 1 in 4 out MIDI box, as the first item, & then have all the other devices connected to that.

I think I still have the schematics for my custom made 1 in 10 out box, that you can limit to 1 in 4 out.

I think, I just gave us all a headache.....

Regards Dr. Bob
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FRANZONI
Double Platinum Member

Ireland
3543 Posts

Posted - 08/06/2008 :  14:04:43  Show Profile  Visit FRANZONI's Homepage  Reply with Quote
Yep you sure did Doc.......thanks for the replies guys....basically i'm trying to do what the-Destructor described,when changing a patch on the pod it will bring in the harmonizer for a part of a song as needed... i'm only planning on MIDIing the XTpro to the harmonizer(which i have to get) so 5ms delay wouldn't be the end of the world..the reason i want to go rackmount is...
1/ the pedalboard to the input of the pod is mono signal so a harmonizer pedal would be in mono also i'm not sure if the pedals are 'intelligent' for steely dan/thin lizzy type harmonys

2/my pedalboard is quite big enough at the moment and i couldn't squeeze anything else in.....

3/ i want to run the harmonizer in the rack as i can split the lot to stereo there(even if it means me dragging another amp to gigs)


going off topic for a mo' but does anyone have any experience with harmonizers like the old digitech isp/dhp 33's/55's etc/...i've heard sound clips and they sound pretty good...steve vai uses/used one,even though he has eventides at his disposal so they mustn't be too bad..or could i use a vocal rackmount harmonizer for guitar like the TC Helicon...any advice/experience even with the pedal type.........??.........

Edited by - FRANZONI on 08/06/2008 14:05:43
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