Mike and Dave proudly present: Harmony Box

Here she is:

The UI

Get your downloads here:
Mac AU

These need to be installed by hand, in the usual way:
Mac AU: /Library/Audio/Plug-Ins/Components
Mac VST: /Library/Audio/Plug-Ins/VST
Win VST: Wherever your VSTPlugIns folder lives

We look forwards to hearing what you think of these!

Also, if you really like this, and want to encourage us to add features, or maybe you reckon we should stick it to the man, and pour all our time into doing things like this.. let us know:

67 Responses to “Mike and Dave proudly present: Harmony Box”

  1. Stephen says:

    Is that a PWN dial? If so I hope it goes to 11 for maximum pwnage.

    Can’t wait to try this out tomorrow when I’m not so tired and hungry.
    Heard about this from CDM.

  3. ronnie says:

    Lovely plug-in guys!

  4. Have given it a proper try and gotta say: Pretty dope!
    What would be really cool if it could output the midi as well.

  5. tony says:

    please make polysynth :)

  6. hollunder says:

    Looks funky.
    Care to port it to linux via LV2 or DSSI? ;)

  7. admin says:

    Polysynth… not entirely sure how that would work… it plays chords…

    Linux version is a mite tricky since neither of us have linux dev environments, nor spare hardware, nor spare time, and also a chunk of the code (that implements the xml skinnable ui) is my copyright, so I don’t want to release it. ;)

  8. +1 on the output to midi

    That we get both the internal sound engine and the ability to play other VSTi etc!

    Top work guy’s


  9. jessej says:

    Very cool device. Just hooked it up to my Korg PadKontrol and having a lot of fun with it! Really inspirational… It would be nice as an MIDI plugin too.. to chain into other VSTis / hardware.

  10. tOtALcULt says:

    On the download now. Can’t wait to play with this badbwoy, the clips you posted are sounding awesome.

  11. [...] This post was Twitted by DavidHolmes [...]

  12. shubs says:

    i made a track i am quite pleased with just using harmony box, sooperlooper, and a few other effects. could i send a link of my track to you? it is a bit long so be warned!

  13. admin says:

    Put it up on SoundCloud! :D Then we can all click and hear it! :D

  14. RES01VE says:

    Great sounding synth. Real nice interface.
    Many thanks for sharing. This will see much use :.

  15. Ben says:

    Hi thanks for making such a good free synth. i really dig the sound of it. I am using the AU unit with Logic pro 7.2, upon launch the synth can be triggered by my controller keyboard, but once a sequence has been made or any navigation away from the synth, it loses connection and i am unable to trigger the sound from it. :s i hope this is a bug that will be fixed as it is an amazing sounding synth.

  16. dobie says:

    wicked,been looking for something like this for years. keep it coming bro.

  17. bodan says:

    very cool… i really like it. what exact chords is it playing?

  18. dobie says:

    yo just check out your harmany box bro,yo don’t give up on it bro.the concept is fire,hot.finish it off.

  19. Hal9000 says:


    note off does not work in au
    logic 8.0.3

    or should it play the whole time ?

  20. Joachim says:

    Hi, cool idea! Works fine (VST and AU) in Live 8.0.4 on Mac, 10.4.11, but with the occasional click at the beginning of notes even in Absolute mode.

    However, Logic 8 Express doesn’t like the AU at all. When instantiated and I play the first note is played, it’s like the sustain pedal is on continuously. To make it stop, I have to press Bypass in the Logic AU host window. Then, when I un-Bypass, can’t make Harmony Box make a single sound.

    +1 on a version with MIDI out! That would be ├╝bercool.



  21. admin says:

    If the resonance is set high enough, it’ll play continually, as the filter self-oscillates.
    Also, it doesn’t handle Note-On/Vel=0 as Note-Off, which some hosts implement. If I get time I’ll sling up a version that handles that.

  22. admin says:

    @bodan; it’s following the rules for chords in modal jazz.
    When you pick a key and a mode, you’re picking 7 notes that form a scale.
    When you play a note of the scale, it plays 1st, 3rd, 5th…,15th relative to that note, within the scale(key/mode) you’ve selected. The amount of each note gets dialled in with the knobs.

  23. bodan says:

    thanks for your reply. i really like that plugin!!! great work. simple and so useful. i made a donation to proof my respect for your great work.
    buy some beers and enjoy your life ;-)

  24. Small Town Kid says:

    Just tried to open in Logic 8.02
    Causes Logic to crash.
    Hardware Overview:

    Model Name: MacBook Pro
    Model Identifier: MacBookPro4,1
    Processor Name: Intel Core 2 Duo
    Processor Speed: 2.6 GHz
    Number Of Processors: 1
    Total Number Of Cores: 2
    L2 Cache: 6 MB
    Memory: 4 GB
    Bus Speed: 800 MHz


    Been lookin for something like this

  25. admin says:

    Can you send me a crash log? When it crashes, click for more info, and copy and paste that. Send to dave@dmgsound.com plz!! :D

  26. dobie says:

    i love this plugin,still a bit buggy but i love it. having problems with it in logic 8 and it would be great if you got the midi notes to the cords in the piano roll editor not just a line, so you can move the midi to diiffrent tracks to trigger diffrent sounds.

  27. dobie says:

    p.s or it came with other sounds.

  28. Lesdiam says:

    Can’t get any sound out of it in Logic 8.03 on a Mac Pro 8 core, latest updates.

    Works on the iMac G5, but not the Mac Pro. Anything I can try?

  29. mk says:

    Midi outpuuuuuuuuuuuuuuuuuut please!

    Thanks :)


  30. dobie says:

    please come with an update.

  31. Stony says:

    Very Nice…Will try to use in an upcoming production. I do alot of this kind of chordal stuff manually in step time..
    Anyway thanks very much. Works quite nicely in acid 4.0 BTW

  32. bobby says:

    wow very cool!
    would be even better if it output midi!

  33. Bert says:

    Great, i was looking for something like this a long time.
    Unfortunately there are no presets and no option to generate other sounds.
    But i believe the next version will be better.

    Thanks guys.

  34. cube says:

    very cool indeed. I like very much the sound engine actually.

    worrk nice as VST with Cubase 4 under OSX Tiger, except the black keys play single notes only, no chords. Only white keys play chords. Am i missing something?

  35. admin says:

    You are indeed missing something, but you’d only know it if you studied jazz theory.

    There are 7 chord shapes for the scale/mode selected, and each white note (in relative tuning mode) plays the appropriate chord;
    C gives you the I chord, G gives you the V chord, etc…

  36. Plavski says:

    Nice sound on this, I wrote up a little sketch instantly. However, automation seems to be a bit wonky. I was automating the mode switch in Ableton and while assigning MIDI controls elsewhere, it kept stealing focus! It also doesn’t seem to put out an automation line there either. While automation works internally, it doesn’t seem to play well with a DAW.

    It’s a great plugin though, very much up my street musically. If you get the automation issue sorted out, you’ll have a user for life :)

  37. [...] Harmony Box is a synthesizer that has the rules of modal applesauce built-in; you columnist a key, it plays the appropriate chord. You aloof aces the key and the mode. An alias-free oscillator drives a self-oscillating clarify and it has LFOs and Envelopes for fatness. Download Harmony Box [...]

  38. BMC says:

    Cool plugin, couldn’t get it to work properly tho, i’m using Cubase LE, and when i press a key on my MIDI controller it triggers the synth but then when i release the note it doesn’t stop. I had a mess around with the envelopes but nothing changed it.

  39. Agrivex says:

    +1 on Midi output please.

    +1 on getting it to run on Logic 8 / Mac Pro / Snow Leopard. Would donate if it runs on this config :-)

  40. admin says:

    Will investigate on Snow Leopard as soon as I can get a copy installed. Can you tell me what happens now on Snow Leopard? If it’s failing in AU Validator or somesuch, can you paste me the output? Thanks!

  41. Markus says:

    Can’t get a single sound out of it..

    SnowLeopard, Logic 9..

    It DOESN’T cause any crashes. Maybe this helps..


  42. subtroniq says:

    Midi outpuuuuuuuuuuuuuuuuuut pleeeeeeeease!


  43. steponeloops says:

    Dear Mr Noise,

    great plug, i like it very much. However: on energyXT 2.5 there’s no note off… I just saw that you are aware of this problem. It would be great if you (occasionally) would post an update… that would be very kind.

    However, thank you very much. Like it. Instant bliss.


  44. gean says:

    with Snow leopard
    does not work, any suggestions?

  45. gean says:

    in snow leopard just does not sound, as valid if it does, but does absolutely nothing sounds good is your plugin

  46. John says:

    Fun plug-in.

    It would be especially cool of one could import .sf2s into Harmony Machine to be harmonized and filtered.

  47. Slinky says:

    Linux version would be vastly appreciated, if you are able to make such a thing.

    There are not too many native Linux VSTs out there – so far I’ve bought two :-)

  48. Andy says:

    Got it off the Computer Music magazine DVD. Running Reaper. I added it as an FX to an audio guitar track. I see the GUI however it has no effect on the output sound no matter how much I twiddle the GUI???? I am a newb but all other effects I have installed to date work fine.

  49. Ken says:

    I just downloaded this today. Can someone tell me how to make the notes shorter?

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