Norm2023

> you talking about an outboard USB hub connected to your computer? No....I specifically mentioned both the voltage and amperage of the AC adapter that is powering the hub. But I suppose the problem is not the amperage, rather the voltage. That would make sense. I was curious to see if I could use the 12 volt rail of a computer power supply and it worked fine actually as I could find a plug that fit OK and it required 12 volts, not 9 which a computer power supply doesn't offer, just 12, 7.5 and 5. Not sure what the amperage is but it must be substantial. Its a handy solution if you never move it and you're missing your AC adapter and your only source is priced in the stratosphere, which many stores are now and you tend to play the piano close to your computer. I have no idea how long a run you could have though. Probably quite far.

I'm trying a PX-130 and its not working. The USB2 hub is powered of course so the full 5 volts and full amperage (2.4 amps) is available. So that got me thinking (after losing an AC adapter before to a Casio piano) which Casio 88 key pianos can be run off USB? If you're moving stuff around its handy to be able to run off USB. And would it help if it was USB3 as that seems to offer more power.