Using usb, Usb notes, Ge 35 – Dave Smith Instruments MOPHO KEYBOARD User Manual
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Using USB
Mopho’s USB 2.0 port enables bidirectional MIDI communication with a 
computer. A MIDI interface and MIDI cables are not necessary, just a USB 
cable. Mopho is a Class Compliant USB device. That means it does not require 
any additional drivers to be installed to communicate with a Mac or Windows 
computer. 
Mopho transmits and receives MIDI data via USB, but does not transmit audio.
Note: MIDI In and USB should not be used at the same time, as 
overlapping messages from different sources may cause Mopho to 
respond unpredictably. MIDI Out and USB can be used at the same time 
and transmit the same data. Poly Chain Out is an independent MIDI bus 
and can be used regardless of the “normal” MIDI connection. 
USB Notes
Under Mac OS X, Mopho will appear as a MIDI port when connected via USB 
and can be configured using the Mac’s Audio MIDI Setup application (typically 
found in Applications/Utilities). 
Under Windows XP, the first time Mopho is connected via USB, the “Found 
new hardware” alert appears and Mopho is automatically installed—somewhat 
misleadingly—as “USB Audio Device.” If there is already another Class 
Compliant USB device installed, Mopho will show up as “USB Audio 
Device(2)” (or 3 or 4 or...). 
To determine which USB Audio Device is Mopho:
1. Open the System Control Panel
2. Click the Hardware tab.
3. Click Device Manager.
4. Expand “Sound, video, and game controllers.”
5. Right-click any “USB Audio Device” and choose Properties from the
pop-up menu.
The General tab of the USB Audio Device Properties window displays the 
Device Type, Manufacturer, and Location. For Mopho, the Location should read 
“Location n (DSI Mopho).” 
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