Slightly odd question - but does anyone know if these keyboards are capable of being powered over MIDI?

I haven't used mine in ages and realised the only cable I had for it was an old PC joystick port type adaptor (which I seem to recall did power it), however my current machine has no such port - so before I head out tomorrow to buy a USB-MIDI adaptor, I could do with checking if I need to track down a suitable PSU as well.

(and where do you buy multi power adaptors on the high street these days?)

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http://www.jeremycorbett.co.uk

I don't know the keyboards to be definitive, but I don't think so. However, it's worth checking the manual to see what you can discover. I've printed off some schematics for Joystick port adaptors and none of those included power so it might have been specific to the keyboard and cable. I've found a link to the manual here. It only mentions a standard power supply, no mention of power over MIDI.

I know a few MIDI pedal boards had the option for MIDI power, but they were clearly defined as non-standard MIDI devices. Although the MIDI standard uses a 180 degree 5 pin DIN connector, the cable is a twisted pair and screen with 2 pins at the connector unused. And those MIDI pedals took advantage of the unused pair of connectors to deliver power to the unit.

If you REALLY wanted a remote power supply through the MIDI cable you could do it. But you need to make a couple of boxes, one to input the power into the cable and another to break it out, and get some cables with all 5 pins connected. Would make things nice and neat, but at the expense of having to carry non-standard MIDI cables for spares.

Andy

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When the going gets weird, the Weird turn Pro.

My 88-key Studiologic can't be powered over MIDI.

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hourglass | random thoughts | doubledotdash!? collective

Powered over MIDI? There is no such thing, unless you mean the few tiny old MIDI filter boxes that could power themselves from the (tiny) current flowing over a MIDI cable...

Nothing of any size can be powered from a MIDI port.

Midi powering for controller keyboards was not midi powering exactly. It actually used power available via the game port on the computer. This utilized , generally, a 15 pin cable from the computer's game port to a 15 pin socket on the back of the controller. No standard 5 pin midi cables were used. The power used came from the power used normally to power joysticks.

Edited by DGL. (18/06/12 07:44 PM)

Do you mean powered via USB?

My Axiom Midi keyboard can be powered by USB.

Hmm, pretty sure I had that and another keyboard working with just the joystick->midi cable for many years. Maybe I've got confused by subsequent USB powered keyboards.

Darn - had to go out and buy a new midi USB adaptor and a general purpose PSU, which now works - however midi timing seems very flakey - everything recorded seems to play back all over the place. Hmm - it has been a while since I've written music on this machine so further investigation is required. And I can't seem to reliably get latency below 512 samples any more ...

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http://www.jeremycorbett.co.uk