MTE Posted April 19, 2007 Report Share Posted April 19, 2007 Hi dudesI owned my 2nd Midistart2-Masterkeyboard and plugged it to my PC with normal Midiconnection (not USB)Then I plugged a walltransformator with 9V/500mA, it works great...after a little time I plugged off the PSU and noticed, that the power LED is still on...ok I thinked and grabbed the keys and it sends also NoteOns/Offs.....I was more surprised when I switched Off the Power-Button and the keyboard works also :oIs this normal ??? ??? ???RegardsMTE Quote Link to comment Share on other sites More sharing options...
doc Posted April 19, 2007 Report Share Posted April 19, 2007 There are two possibilities on this:1) Your keyboard has some very big caps inside. How long can you play without power ?I think, after a while the led is off, or not?2) Your keyboards soaks power from the midi +5V. This would not be so good. But it would be possible.greetsDoc Quote Link to comment Share on other sites More sharing options...
TheAncientOne Posted April 19, 2007 Report Share Posted April 19, 2007 My evolution MK-7 mini keyboard does the same, it plugs into the PC joystick/midi port. I think it uses the joystick power common on the soundblaster input plug. As a thought, I've just worked up a design for a stand alone box for it - so it will work as a midi keyboard without being plugged into the PC. Is it worth putting on this on line ?Mike Quote Link to comment Share on other sites More sharing options...
stryd_one Posted April 19, 2007 Report Share Posted April 19, 2007 Is it worth putting on this on line ?Yes please :) Quote Link to comment Share on other sites More sharing options...
dj3nk Posted April 20, 2007 Report Share Posted April 20, 2007 I suppose this from an usb device but standard midiplugs :? But its very curious that it works when your powerbutton is OFF. Quote Link to comment Share on other sites More sharing options...
Jaicen Posted April 20, 2007 Report Share Posted April 20, 2007 As above, it's probably working off the +5v line coming from the MIDI connection. The power button would be connected to the external inputs, so the MIDI power wouldn't be affected by it. Quote Link to comment Share on other sites More sharing options...
MTE Posted April 20, 2007 Author Report Share Posted April 20, 2007 The problem is....I have 2 identical Midistart2 Keyboards who only send at Midichannel 1 :( (you cant change it)on my 3rd Keyboard (Yamaha SY-35) i can change the Channel...So my Idea was 1 midistart to usb (ch1), 1 to my Motu (ch1)...the yamaha to motu (ch2)rest of the equipment also to the Motu with upcoming channels so i dont need any Midiyoke-driver for the other external machines... Quote Link to comment Share on other sites More sharing options...
stryd_one Posted April 20, 2007 Report Share Posted April 20, 2007 The problem is....I have 2 identical Midistart2 Keyboards who only send at Midichannel 1 :( (you cant change it)Sounds like it's time I started working on the MIDIbox Master Keys project... Quote Link to comment Share on other sites More sharing options...
MTE Posted April 20, 2007 Author Report Share Posted April 20, 2007 MIDIbox Master Keys projectsounds interesting :) Quote Link to comment Share on other sites More sharing options...
stryd_one Posted April 21, 2007 Report Share Posted April 21, 2007 sounds interesting :)It might be good for you... I wrote a reply but it got a bit lengthy so I made the wiki page: MIDIBox Master Keys :) Hope you like! Quote Link to comment Share on other sites More sharing options...
DrBunsen Posted April 24, 2007 Report Share Posted April 24, 2007 You know, stryd, if you added an emulated joystick port to the MBMK that would make a load of cheap keyboards (and four pots) useable. Same goes for a USB Host IC ...This one's nice, it has two high speed USB ports, software switchable to Host or Slave. It even has PS2 ports. Quote Link to comment Share on other sites More sharing options...
stryd_one Posted April 28, 2007 Report Share Posted April 28, 2007 That is a nice IC, but having taken a look at it, I think it might be beyond my skill to use it :-[ Maybe for version 2 ;)Although, a joystick port could be cool, I could make a simple circuit to switch it between joysticks and midi keyboards... Is that what you meant? Quote Link to comment Share on other sites More sharing options...
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