M-AUDIO 61 - Manual (Page 41)

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40 ProKeys Sono 61 User Guide
Troubleshooting
ProKeys Sono is a high-quality digital piano that has been tested under a wide variety of conditions to ensure trouble-free
performance . In the event that you do experience difficulty with your ProKeys Sono, this section provides tips to help resolve some
basic issues that you may encounter .
Problem: My ProKeys Sono keyboard suddenly stopped working after having performed fine since installation .
Solution: Close any music applications you are using, switch ProKeys Sono off, and restart your computer . Once your
computer has completely restarted, switch ProKeys Sono back on and try again to see if the problem resolves .
Problem: I have connected a sustain pedal to my M-Audio keyboard, but its operation is reversed (i .e ., the notes sustain when
the pedal isn’t pressed, but the notes stop sustaining once the pedal is pressed) .
Solution: The polarity of the sustain pedal is calculated by the keyboard upon startup . When ProKeys Sono is powering
up, the sustain pedal is assumed to be in the OFF position . It is important that the sustain pedal is not pressed down during
startup, otherwise its operation may be reversed .
If you would like to intentionally reverse the polarity of your sustain pedal (i .e ., notes are sustained when the pedal is up; notes
stop sustaining when the pedal is pressed), hold the pedal down while the keyboard is being switched on .
Problem: When playing a virtual instrument loaded in my music software, or when attempting to monitor my microphone or
instrument input, there is a noticeable delay before I hear any sound .
Solution: This delay is known as latency, and it can be adjusted by changing the buffer size setting in your M-Audio Control
Panel . The goal is to set the buffer size as low as possible without experiencing artifacts in the audio . Faster computers
generally allow for smaller buffer size settings, and thus less latency .
When monitoring signals from the Microphone, Instrument or Aux inputs, you can also avoid this problem by using the Direct
Monitor knob instead of monitoring through your music software . See the “Using Direct Monitoring” section in the
“ProKeys Sono Audio Setup and Controls” portion of this User Guide to learn more about direct monitoring .
Problem: I have connected the keyboard to my computer with the USB cable, but I cannot locate the ProKeys Sono USB
keyboard in my software’s MIDI devices dialog box .
Solution 1: ProKeys Sono may not be receiving enough USB bus power to function correctly . Try plugging ProKeys Sono
into a different USB port or a powered USB hub connected to your computer .
Solution 2: In Windows XP, ProKeys Sono will appear as “USB Audio Device” if the optional drivers have not been installed .
Select “USB Audio Device” as your audio and MIDI input and output device .
Problem: I connected ProKeys Sono to my Windows computer and noticed that a question mark appears in the Windows Device
Manager under Other Devices > M-Audio DFU . Does this indicate that there is a problem with ProKeys Sono?
Solution: This behavior is normal and your ProKeys Sono will function normally as a class-compliant device (i .e ., without any
drivers) . Installing the ProKeys Sono drivers extends the keyboard’s functionality in various ways (i .e ., multi-client support,
support for qualified versions of the Pro Tools M-Powered software, and allowing large SysEx transfers) and should resolve
any “DFU” related messages that appear when drivers are not present .
Problem: My synthesizer always recalls the sound next to the program number that I have sent to it from ProKeys Sono . For
example, if I send a program change with the number 40 (Violin), my software loads sound number 41 (Viola) .
Solution: Some General MIDI modules count their sound patches from 1 – 128 instead of 0-127 . Both methods are
common . As a result, there may be an offset of +/-1 between the program change number sent from the keyboard and the
recalled sound patch on your module .