# \#1007 midimuso midi-cv **URL:** \ **Category:** FAQ\ **Created:** [July 15, 2020, 1:06pm UTC](https://lookmumnocomputer.discourse.group/t/1007-midimuso-midi-cv/1446 "2020-07-15T13:06:09Z")\ **Posts on this page:** 20\ **Page:** 11
**Author:** ![Claquoss](https://avatars.discourse-cdn.com/v4/letter/c/0ea827/32.png) [@Claquoss](https://lookmumnocomputer.discourse.group/u/Claquoss)\ **Post date:** [November 29, 2020, 7:10pm UTC](https://lookmumnocomputer.discourse.group/t/1007-midimuso-midi-cv/1446/202 "2020-11-29T19:10:53Z")
Quick Update : it was indeed the program. I Reprogrammed the chip with the software (literally 1 click, super easy to use), and everything is back to normal! Thank you Sam for your help! ---
**Author:** ![JUXTAPOZ74](https://yyz2.discourse-cdn.com/free1/user_avatar/lookmumnocomputer.discourse.group/juxtapoz74/32/523_2.png) [@JUXTAPOZ74](https://lookmumnocomputer.discourse.group/u/JUXTAPOZ74)\ **Post date:** [December 6, 2020, 11:50am UTC](https://lookmumnocomputer.discourse.group/t/1007-midimuso-midi-cv/1446/203 "2020-12-06T11:50:42Z")
Link to the reprogramming software? ---
**Author:** ![Claquoss](https://avatars.discourse-cdn.com/v4/letter/c/0ea827/32.png) [@Claquoss](https://lookmumnocomputer.discourse.group/u/Claquoss)\ **Post date:** [December 6, 2020, 11:56am UTC](https://lookmumnocomputer.discourse.group/t/1007-midimuso-midi-cv/1446/204 "2020-12-06T11:56:02Z")
Here you go : [https://midimuso.co.uk/tools/](https://midimuso.co.uk/tools/) ---
**Author:** ![wrasmussen09](https://avatars.discourse-cdn.com/v4/letter/w/9e8a1a/32.png) [@wrasmussen09](https://lookmumnocomputer.discourse.group/u/wrasmussen09)\ **Post date:** [December 16, 2020, 1:16am UTC](https://lookmumnocomputer.discourse.group/t/1007-midimuso-midi-cv/1446/205 "2020-12-16T01:16:18Z")
Hi everyone. I’m a bit new to electronics diy so troubleshooting isn’t exactly my strong suit, and I’ve had a bit of an issue that I was hoping someone would have a really obvious answer to. Just stuffed and soldered the 1007, went to plug it in for some good calibration and whatnot, and instead MAGIC SMOKE. I can’t say that this pleases me greatly. I can tell that at first both 10r resistors (that’s R2 and R3) went right up in great fiery madness. So I took it back to the bench, took a look around, realized I had the polarity on C2 backwards, replaced it, replaced R2 and R3, plugged it back up, and now only R3 becomes fiery deathball of sadness. Any thoughts? Picture ![IMG_20201215_171024899](https://global.discourse-cdn.com/free1/uploads/lookmumnocomputer/original/2X/6/697cd4c412d57813aa2d438e56a3d3d57da9efa2.jpeg) below in case I’m just a total numbskull (bit of a messy solder job, I know–like i say, I’m a noob), and put something in backwards or some such. All help appreciated. Cheers. ---
**Author:** ![analogoutput](https://yyz2.discourse-cdn.com/free1/user_avatar/lookmumnocomputer.discourse.group/analogoutput/32/29663_2.png) [@analogoutput](https://lookmumnocomputer.discourse.group/u/analogoutput)\ **Post date:** [December 16, 2020, 1:20am UTC](https://lookmumnocomputer.discourse.group/t/1007-midimuso-midi-cv/1446/206 "2020-12-16T01:20:18Z")
> [@General advice for troubleshooting a module and asking for help](https://lookmumnocomputer.discourse.group/t/general-advice-for-troubleshooting-a-module/2049): > > (This is a wiki post, please add and correct!) Look and see if others have had the same problem. Use the Discourse search facility to find topics where the module you’re building is discussed. Inspect your work. Verify all components are correct values. Look for solder connections that are rough, irregular, skimpy, dull, or missed completely (we all do that!) and reflow them. Look for solder bridges between pads and remove them. Check your power connection. If it’s a Eurorack style power cabl… ---
**Author:** ![devicex](https://yyz2.discourse-cdn.com/free1/user_avatar/lookmumnocomputer.discourse.group/devicex/32/28_2.png) [@devicex](https://lookmumnocomputer.discourse.group/u/devicex)\ **Post date:** [December 16, 2020, 2:07pm UTC](https://lookmumnocomputer.discourse.group/t/1007-midimuso-midi-cv/1446/207 "2020-12-16T14:07:33Z")
get out the magnifying glass and look for solder bridges , especially on the ic sockets / power header . ---
**Author:** ![Jos](https://yyz2.discourse-cdn.com/free1/user_avatar/lookmumnocomputer.discourse.group/jos/32/151_2.png) [@Jos](https://lookmumnocomputer.discourse.group/u/Jos)\ **Post date:** [December 16, 2020, 3:06pm UTC](https://lookmumnocomputer.discourse.group/t/1007-midimuso-midi-cv/1446/208 "2020-12-16T15:06:33Z")
Before you connect a power supply to a circuit you have just build, measure the resistance between the power leads and the GND of the circuit. If the resistance is very low, you have a short somewhere and need to solve that before connecting any actual power to it. It is unwise to make the assumption that everything will be OK, it is wise to check first! ---
**Author:** ![lookmumnocomputer](https://yyz2.discourse-cdn.com/free1/user_avatar/lookmumnocomputer.discourse.group/lookmumnocomputer/32/23_2.png) [@lookmumnocomputer](https://lookmumnocomputer.discourse.group/u/lookmumnocomputer)\ **Post date:** [December 17, 2020, 9:39am UTC](https://lookmumnocomputer.discourse.group/t/1007-midimuso-midi-cv/1446/209 "2020-12-17T09:39:39Z")
chips look like they are the right way round on this board, but check on the other side. 9 times out of 10 when this happens to me I’ve put in an opamp backwards… remove all chips and test it without them in, if the problem is still there its something else. ---
**Author:** ![Enoharduino](https://avatars.discourse-cdn.com/v4/letter/e/51bf81/32.png) [@Enoharduino](https://lookmumnocomputer.discourse.group/u/Enoharduino)\ **Post date:** [December 20, 2020, 10:19am UTC](https://lookmumnocomputer.discourse.group/t/1007-midimuso-midi-cv/1446/210 "2020-12-20T10:19:41Z")
hi I have just started to get interested in the MIDI and how it works… and I still have a lot to learn!! 😅 my question is : does this module allow you to play chords or not? because at the moment with a vco 1v module I can’t play several notes at the same time. does this module allow it? ---
**Author:** ![eric](https://avatars.discourse-cdn.com/v4/letter/e/898d66/32.png) [@eric](https://lookmumnocomputer.discourse.group/u/eric)\ **Post date:** [December 20, 2020, 10:22am UTC](https://lookmumnocomputer.discourse.group/t/1007-midimuso-midi-cv/1446/211 "2020-12-20T10:22:18Z")
You’ll need as many VCOs as notes in your chord. ---
**Author:** ![Enoharduino](https://avatars.discourse-cdn.com/v4/letter/e/51bf81/32.png) [@Enoharduino](https://lookmumnocomputer.discourse.group/u/Enoharduino)\ **Post date:** [December 20, 2020, 10:26am UTC](https://lookmumnocomputer.discourse.group/t/1007-midimuso-midi-cv/1446/212 "2020-12-20T10:26:29Z")
ok and the module allows to control 6 of them at the same time, right? ---
**Author:** ![Jos](https://yyz2.discourse-cdn.com/free1/user_avatar/lookmumnocomputer.discourse.group/jos/32/151_2.png) [@Jos](https://lookmumnocomputer.discourse.group/u/Jos)\ **Post date:** [December 20, 2020, 10:42am UTC](https://lookmumnocomputer.discourse.group/t/1007-midimuso-midi-cv/1446/213 "2020-12-20T10:42:45Z")
Correct, but you need to set it to mode ‘6’ first by sending it a program change ‘6’ via midi. If you are using some kind of a midi sequencer, it is often convenient to create a program change message at the beginning of the sequence. In that way you are sure your midi2cv interface will always run the mode that is appropriate for that sequence. ---
**Author:** ![Enoharduino](https://avatars.discourse-cdn.com/v4/letter/e/51bf81/32.png) [@Enoharduino](https://lookmumnocomputer.discourse.group/u/Enoharduino)\ **Post date:** [December 20, 2020, 11:41am UTC](https://lookmumnocomputer.discourse.group/t/1007-midimuso-midi-cv/1446/214 "2020-12-20T11:41:14Z")
I use my keystep. How does it work with a MIDI keyboard? ---
**Author:** ![Jos](https://yyz2.discourse-cdn.com/free1/user_avatar/lookmumnocomputer.discourse.group/jos/32/151_2.png) [@Jos](https://lookmumnocomputer.discourse.group/u/Jos)\ **Post date:** [December 20, 2020, 3:05pm UTC](https://lookmumnocomputer.discourse.group/t/1007-midimuso-midi-cv/1446/215 "2020-12-20T15:05:16Z")
If you connect a midi device to the midi2cv interface, then the interface will produce cv-voltages and gates if the midi device sends the info the midi2cv interface is set to respond to. It will do that whether the midi device is a pc with a DAW and a midi interface or it is a keyboard or keystep, or whatever as long as that can send midi data. Makes no difference. Just make sure the midi2cv device is set to the mode you want and send the appropriate midi signals with the midi device. ---
**Author:** ![troberts289](https://yyz2.discourse-cdn.com/free1/user_avatar/lookmumnocomputer.discourse.group/troberts289/32/735_2.png) [@troberts289](https://lookmumnocomputer.discourse.group/u/troberts289)\ **Post date:** [January 11, 2021, 7:13pm UTC](https://lookmumnocomputer.discourse.group/t/1007-midimuso-midi-cv/1446/216 "2021-01-11T19:13:04Z")
I have a question about the wiring for linking 2 modules. I was reading the Midimuso instructions, and I understand the in and out chain pins, but is also calls out a JP1 pin that I don’t see in the Kosmo panel. ![image](https://global.discourse-cdn.com/free1/uploads/lookmumnocomputer/original/2X/2/2a89167ed0d6384cfb6fe35bb496c5d776221f50.jpeg) ---
**Author:** ![lookmumnocomputer](https://yyz2.discourse-cdn.com/free1/user_avatar/lookmumnocomputer.discourse.group/lookmumnocomputer/32/23_2.png) [@lookmumnocomputer](https://lookmumnocomputer.discourse.group/u/lookmumnocomputer)\ **Post date:** [January 11, 2021, 8:27pm UTC](https://lookmumnocomputer.discourse.group/t/1007-midimuso-midi-cv/1446/217 "2021-01-11T20:27:27Z")
hey that’s achieved by the jumper you put in place instead. the one thats basically a connector either way. if you see here what you do is keep the jumper attached in the first midimuso. and attach the chain output from the first one to the chain input of the second one. if it doesn’t work first time turn around the cable. check the schematic here so where you see the tx wire on chain output that needs to connect to the second midimuso rx [https://static1.squarespace.com/static/5912db7ee6f2e1435dbab4fd/t/5f11ddca15c4d51df8793f91/1595006412162/1007+KOSMO+MIDIMUSO+1.3.pdf](https://static1.squarespace.com/static/5912db7ee6f2e1435dbab4fd/t/5f11ddca15c4d51df8793f91/1595006412162/1007+KOSMO+MIDIMUSO+1.3.pdf) let me know how you get on! ---
**Author:** ![troberts289](https://yyz2.discourse-cdn.com/free1/user_avatar/lookmumnocomputer.discourse.group/troberts289/32/735_2.png) [@troberts289](https://lookmumnocomputer.discourse.group/u/troberts289)\ **Post date:** [January 11, 2021, 11:28pm UTC](https://lookmumnocomputer.discourse.group/t/1007-midimuso-midi-cv/1446/218 "2021-01-11T23:28:23Z")
So, is it just one cable between the two modules? I have another question about setting them to polyphony. Both modules work in their default mode, just as you would expect. Each midi channel puts out CV on a row of the module, but when I send the signal to set it to polyphony I only get CV on the first row. I’m thinking it might have something to do with the signal coming from my key step needing to be changed, I just haven’t figured that part out yet… ---
**Author:** ![lookmumnocomputer](https://yyz2.discourse-cdn.com/free1/user_avatar/lookmumnocomputer.discourse.group/lookmumnocomputer/32/23_2.png) [@lookmumnocomputer](https://lookmumnocomputer.discourse.group/u/lookmumnocomputer)\ **Post date:** [January 12, 2021, 12:55am UTC](https://lookmumnocomputer.discourse.group/t/1007-midimuso-midi-cv/1446/219 "2021-01-12T00:55:55Z")
yep just 1 cable between the two, then on boot up the first module send a handshake command to automatically set the second to the second set. as for poly. which mode are you speaking of? the poly 4 mode? or the 6 channel mode? ---
**Author:** ![troberts289](https://yyz2.discourse-cdn.com/free1/user_avatar/lookmumnocomputer.discourse.group/troberts289/32/735_2.png) [@troberts289](https://lookmumnocomputer.discourse.group/u/troberts289)\ **Post date:** [January 12, 2021, 1:22am UTC](https://lookmumnocomputer.discourse.group/t/1007-midimuso-midi-cv/1446/220 "2021-01-12T01:22:33Z")
4, on just one module. Whem I put them together, fist I calibrated the control voltage, then I started testing each module in default mode separately, in their default mode. I can switch between midi channels one through four on the key step and it puts out CV on rows one through four on the module. Next I sent the command to set each module separately to four voice Polly. Row one still puts out CV but nothing else does. I can tell the command changed something because when I switch to MIDI channels two through four on the key step it no longer puts out CV on rows two through four on the modules. I get the feeling I’m making a really obvious and simple mistake somewhere… I just don’t see it yet… ---
**Author:** ![troberts289](https://yyz2.discourse-cdn.com/free1/user_avatar/lookmumnocomputer.discourse.group/troberts289/32/735_2.png) [@troberts289](https://lookmumnocomputer.discourse.group/u/troberts289)\ **Post date:** [January 12, 2021, 10:25pm UTC](https://lookmumnocomputer.discourse.group/t/1007-midimuso-midi-cv/1446/221 "2021-01-12T22:25:32Z")
Well, one problem is solved. At first I was sending the changed commands with Reaper using the premade midi files. I tried using the online tool instead ([https://midimuso.co.uk/tools/](https://midimuso.co.uk/tools/)), now they’re both working perfectly alone. Still having a problem setting the two to link. I’m patching a jumper cable the output of the first module to the input pin on the second. I tried both the top and bottom pins, but they still don’t work when wired together. I’m sure I just misunderstood the instructions, since everything else works . PS, I’ve been shutting hem off each time I change the pins [Previous page](https://lookmumnocomputer.discourse.group/t/1007-midimuso-midi-cv/1446.md?page=10) [Next page](https://lookmumnocomputer.discourse.group/t/1007-midimuso-midi-cv/1446.md?page=12)