MIDI2CV - an easy to build MIDI to CV/Gate

Discussion for Hexinverter eurorack modules - email Hex if you need anything urgent!

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Baszline
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MIDI2CV - an easy to build MIDI to CV/Gate

Post by Baszline » Tue Jun 18, 2013 6:08 am

I've read about this project here before, but can't find it anywhere available. Will this project see daylight!? I'd like to build one! :hyper:

http://cv.hexinverter.net/?page=projects&id=midi2cv-v10

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desdinova
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Post by desdinova » Tue Jun 18, 2013 9:29 am

I'd definitely be down for a full kit depending on cost.

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hexinverter
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Post by hexinverter » Tue Jun 18, 2013 9:49 am

Hiya! Yes indeed this project is happening :) ETA: 2-3 weeks.

Here is the Muffwiggler DIY forum thread: viewtopic.php?t=75544&highlight=

Here's my mailing list if you want to get an email when they're in stock: http://eepurl.com/pDf_5

Prices are as follows:

- PCB set w/ PIC: $39
- PCB set w/ PIC and 8HP eurorack panel: $59
- Full eurorack kit: $110
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Baszline
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Post by Baszline » Wed Jun 19, 2013 4:39 am

A, ok cool! Could not find this thread. Thanks for the info! :tu:

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ben_hex
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Post by ben_hex » Thu Jun 20, 2013 4:29 pm

Great to have another poly option midi interface. Was thinking of waiting for the doepfer, then The Vermona qMI was mentioned then the analogue systems now this ... Tricky one.

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qfactor
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Post by qfactor » Fri Aug 02, 2013 9:19 am

Hex: for setting (learning) the MIDI channel, does the module store the channel set in memory, or do you have to "re-channelize" it every time it's powered down?
Thanks!

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lessavyfav
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Post by lessavyfav » Fri Aug 02, 2013 9:41 am

Great project! Great build! Yes re chanelize each time - the only real shortcoming flash rom or Channel pins or something would have been really nice
I'm Tim and I'm excited for modular synthesis! :nana:

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robotopsy
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Post by robotopsy » Wed Aug 28, 2013 9:46 am

Just finished mine...
Calibration time now

:yay:

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wednesdayayay
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Post by wednesdayayay » Wed Aug 28, 2013 11:56 am

please let us know how this goes!
I would love to find "the solution" for cv'ing my madrona labs soundplane but don't have a regular modular power supply as I really only use ciat lonbarde gear

if not this then the kenton solo or doepfer dark link seem reasonable enough

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robotopsy
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Post by robotopsy » Sun Sep 01, 2013 3:16 am

Works really great
easy to use
great price
easy to build... well.. !?!? if you dont screwup the inter-board connect headers like I did. I put some on the wrong side of the panel and while unsoldering them... they melt.... :sadbanana:

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hexinverter
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Post by hexinverter » Sun Sep 01, 2013 3:55 am

lessavyfav wrote:Great project! Great build! Yes re chanelize each time - the only real shortcoming flash rom or Channel pins or something would have been really nice
Yeah for sure! Those would be nice. If it were me that programmed it I would have used a larger PIC device and used the extra pins to have ICSP and a bunch of other settings you could set with jumpers (ie: channel, etc.)
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robotopsy
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Post by robotopsy » Sun Sep 01, 2013 2:39 pm

I did find a way to get it done. :sb:
silly me :doh:
should have checked twice !!!!!!! :bang:
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nd595
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Post by nd595 » Thu Sep 05, 2013 2:37 pm

Great you found the way after all!
Just wanted to add that chromatic tuner is a great device for calibration - and not only. There are a plenty of cheap (and some - expensive, but not THAT much better) apps - like Cleartune for IOS - which do the job perfectly.

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jmcecil
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Post by jmcecil » Thu Sep 05, 2013 2:56 pm

My only problem is that I am MU and need a panel. I'm making my own, but my craftsmanship skills border on kindergarten finger painting. All I did was drill some holes in some aluminum and it looks like a serial killer went to town with an ax.
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Stereotactixxx
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Post by Stereotactixxx » Thu Sep 05, 2013 3:15 pm

How about this one from Re:synthesis?
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jmcecil
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Post by jmcecil » Thu Sep 05, 2013 3:16 pm

Stereotactixxx wrote:How about this one from Re:synthesis?
Image
hmm , I asked and was told they didn't have one for the new layout... but that looks like the same one?

EDIT, well the 24 part would be synch and no reset.
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hexinverter
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Post by hexinverter » Thu Sep 05, 2013 4:49 pm

jmcecil wrote:
hmm , I asked and was told they didn't have one for the new layout... but that looks like the same one?

EDIT, well the 24 part would be synch and no reset.
The labels won't match, however, the hardware is the same, so as long as you remember what the outputs are doing, it should work for you :tu:
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climbingtyler
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Post by climbingtyler » Thu Sep 05, 2013 6:51 pm

This looks nice!

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Baszline
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Post by Baszline » Wed Sep 11, 2013 1:52 pm

Does anyone know which mini jack sockets are used to build this module?
I have some spare Switchcraft ones but they don't seem to fit.

Are these the ones? 'Erthenvar' or something like that? :hmm:

http://www.thonk.co.uk/shop/pj301bm-3-5 ... ckets-x50/

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robotopsy
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Post by robotopsy » Wed Sep 11, 2013 7:47 pm

yes those are the same as erthenvar's

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Baszline
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Post by Baszline » Thu Sep 12, 2013 3:01 am

robotopsy wrote:yes those are the same as erthenvar's
OK, cool! Thanks! :tu:

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jmcecil
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Post by jmcecil » Sat Sep 14, 2013 6:45 pm

I'm trying to calibrate the MIDI2CV and I can only get about .2 volts total adjustment out of the VOCT pots. Calibrated to 0.0000 CV just fine. I'm only getting a .33 V increase per octave. Any ideas what the prob with the VOCT pots would be?
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robotopsy
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Post by robotopsy » Sat Sep 14, 2013 11:38 pm

I had the same problem. I managed to run in ableton Live a synth plugin while running the same sequence to an oscillator with the CV2midi and did it by ear. I had a problem with the gate ouputs some modules were always detecting a gate signal even without any midi. I had a 47k resistors to each gate output and it worked correctly.

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jmcecil
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Post by jmcecil » Sun Sep 15, 2013 8:27 am

robotopsy wrote:I had the same problem. I managed to run in ableton Live a synth plugin while running the same sequence to an oscillator with the CV2midi and did it by ear. I had a problem with the gate ouputs some modules were always detecting a gate signal even without any midi. I had a 47k resistors to each gate output and it worked correctly.
I don't follow. I am at the end of the pot and only get .333 per octave.
music noun, often attributive
: personal interpretation of ones auditory experience beyond basic sound recognition
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robinba
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Post by robinba » Sun Dec 08, 2013 9:15 am

When is the next batch of pcb's, IC's and faceplates expected for the midi2cv?

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