USB power Windows/Mac
Posted: Sat Apr 07, 2012 6:55 pm
Hello,
this afternoon, i've experiencing for two hours over the following problem :
When hitting hard a cymbal (DIY), the MD would not respond for about 1 second, so missing some hits on snare/kick/hihat. Then it come back to normal.
Sometimes, hitting too hard would cause the MD to hang, needing a restart.
Sometimes, it is like messages where in hold for one second, and then sent all at the same time after that second.
So, i tried many times to change the resistors values, because I thought my pads where too "hot", sending a too strong signal to the megadrum, because everything was fine when hitting the cymbals softly.
But it didn't change anything, neither by changing to a smaller piezzo less sensible.
The solution came from another post (http://www.megadrum.info/forums/viewtopic.php?f=4&t=1927&p=21055&hilit=usb+hub+external#p21055) talking about using an external powered usb hub to power the MD.
I don't have such a device, so i switched from my MacBook Pro to an old Windows laptop, and guess what.... the problem disappeared immediately !
So here is my conclusion : i think that the USB device declaration is not handled correctly by the macintosh so it doesn't give enough power to the MD.
What the cause could be ? either from the OSX Lion usb driver handling, or in the MD PIC firmware being not fully class compliant, or not 100% compatible with the brand new OSX Lion ?
Any suggestion is welcome as i would really appreciate to avoid using an external hub.
thanks, Raphaƫl
this afternoon, i've experiencing for two hours over the following problem :
When hitting hard a cymbal (DIY), the MD would not respond for about 1 second, so missing some hits on snare/kick/hihat. Then it come back to normal.
Sometimes, hitting too hard would cause the MD to hang, needing a restart.
Sometimes, it is like messages where in hold for one second, and then sent all at the same time after that second.
So, i tried many times to change the resistors values, because I thought my pads where too "hot", sending a too strong signal to the megadrum, because everything was fine when hitting the cymbals softly.
But it didn't change anything, neither by changing to a smaller piezzo less sensible.
The solution came from another post (http://www.megadrum.info/forums/viewtopic.php?f=4&t=1927&p=21055&hilit=usb+hub+external#p21055) talking about using an external powered usb hub to power the MD.
I don't have such a device, so i switched from my MacBook Pro to an old Windows laptop, and guess what.... the problem disappeared immediately !
So here is my conclusion : i think that the USB device declaration is not handled correctly by the macintosh so it doesn't give enough power to the MD.
What the cause could be ? either from the OSX Lion usb driver handling, or in the MD PIC firmware being not fully class compliant, or not 100% compatible with the brand new OSX Lion ?
Any suggestion is welcome as i would really appreciate to avoid using an external hub.
thanks, Raphaƫl