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Posted

Hi,

i would like to build a midi merger that can merge at least 4 midi inputs together. should i just build 3 MIDImerger units and do it in two steps? or would that introduce latency? is there a smarter way to do it ? i want to build a small box to bring with me for playing live something like the (expensive) "MIDIsolutions Quadra merge"

what do you reckon ?

Posted (edited)

Hi,

you could build a LPC17 core module, enable MIDI IN3 and MIDI IN4, and install the new MIDIO V3, which has an inbuilt MIDI router, that can nicely be configured via display/tactile switches:

http://ucapps.de/midio128.html

This new input/output MIDIbox is very flexible and also allows to forward/route MIDI to ethernet/OSC, so you can network all of your MIDI equipment (if necessary, just build another MIDIO V3).

Have lots of fun!

Bye,

Peter

Edited by Hawkeye
Posted

Thanks, that core looks awesome!! But perhaps a little overkill for what i want to do. I allready built a bunch of midi controllers using ATmega328 micros, and only want to merge MIDI (no need for usb or OSC or SDcards). So i guess what i am wondering is how much latency is introduced per merge unit (using the PIC16F88 variant). will i suffer?

oh and if i do decide to forego all my ATmega junk and start building MIDIbox stuff, where would i get the parts for this LPC17 core module?

Cheers

Daniel

Hi,

you could build a LPC17 core module, enable MIDI IN3 and MIDI IN4, and install the new MIDIO V3, which has an inbuilt MIDI router, that can nicely be configured via display/tactile switches:

http://ucapps.de/midio128.html

This new input/output MIDIbox is very flexible and also allows to forward/route MIDI to ethernet/OSC, so you can network all of your MIDI equipment (if necessary, just build another MIDIO V3).

Have lots of fun!

Bye,

Peter

Posted (edited)

Hi Daniel,

there is a shopping list of parts on the LPC17 page on ucapps.de - you can get the PCB and the parts from SmashTVs shop, and you can get the LPC module from many resellers (including mouser).

http://ucapps.de/mbhp_core_lpc17.html

http://www.midibox-shop.com/buy.html

Regarding latency, the LPC17 MIDIO solution will be as quick as possible (the limit is not the processor power, but the limited bandwidth of the MIDI wire protocol).

A cascade of three standard MIDI mergers should be pretty quick, too (latency most likely will be unnoticable), if you prefer that solution, but the LPC approach is much more universal - you can add things you may need later and have great MIDI routing capabilities... (including up to four MIDI OUTs) and a "free" MIDI interface (USB port included).

Bye,

Peter

Edited by Hawkeye

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