SynthMaker

midi value tester

Archive · 2006 2 old posts

From the original SynthMaker forum (2004–2014), with its members’ names and dates.

NothanUmber ·

Have built a small schematic that can be used to test the quantity and quality of the midi output coming from a midi controller (quantity: does the controller really cover all velocities/pitch bend, aftertouch or modwheel values etc. quality: is it possible to precisely generate a specific value or does the controller produce different values even when it's played more or less in the same way). The schematic supports 8 Bit and 14 Bit resolutions (the latter only where appliable, e.g. for pitch bend or several CCs). As the redraw in the high resolution (16000+ gui elements) is a little bit sluggish there is an option "delay redraw" that delays the redraw of the actually reached values until no more new data is coming in (except the current position in order to be able to evaluate the qualitative aspects as mentioned above). In theory that shouldn't be necessary as I already limit the redraw to the absolutely neccessary regions but the high res view is nontheless extremely slow without the delay trick (would be glad if someone could have a look at the relevant portions, perhaps there is some more room for optimisations).

Here the schematic. (No, the internals are far from being "beautiful", just wanted a quick result in order to test a master keyboard 😊 ) In order to export it as standalone program it's a good idea to delete the outgoing midi output as that doesn't make sense for the external version and solely generates an unneccessary entry in the program menu.

Have posted some screenshots of tests of a CME UF8 Master Keyboard and a Doepfer R2M Ribbon in another (german) forum (here a google-translation - unfortunately doesn't translate the whole text but the pictures are more or less self explainatory 🙂 ) (there are also links to exported versions of the schematic - not that SM users would need them... 😉 ), would be glad if some of you could also post some results with your equipment, that could greatly reduce the testing time in the music shop for people who think about buying some new midi equipment (including: me 🙂 )

lanrosta ·

Sweet!

Thanks for this info.

lanrosta

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