Roland A-49 - MIDI Keyboard Controller (White) - Manual (Page 37)

Troubleshooting
37
Problem Confirmation Resolution
Duplicate notes
sound
Is the sound module set to Local On?
Is the software’s THRU function turned on?
Configure as follows.
Sound module: Local Off
Software’s THRU function: Off
For details, refer to the owner’s manual for the
equipment you are using.
Sound is
interrupted
during playback or
recording, sound
drops out
Are multiple programs running? Exit programs that are not in use.
Windows
Is the system software up to date?
Run Windows Update or Microsoft Update
and make sure the system software is up to
date.
Mac OS X
Have you used Mac OS X Software Update?
Run Software Update and make sure the
system software is up to date.
Are the drivers for the computer’s internal
chipset and graphics card up to date?
Update to the latest drivers, as necessary.
Is the unit connected to a USB hub?
Connect the unit directly to one of the
computer’s USB connectors.
Did you try to play back or record immediately
after the computer started up or after it woke
up from sleep mode?
Wait a while before attempting playback or
recording.
There’s a time lag
from when you
play the keyboard
until your software
sound generator
produces sound
Have you lowered (decreased) the audio buffer
size of your software sound generator?
Have you lowered (decreased) the buffer size
for your sound card?
A software sound generator produces sound
using your computer’s sound card. Before the
sound from the software sound generator is
actually heard from the sound card as sound,
there will be a time lag referred to as “latency.”
Regardless of the combination of sound
generator and sound card you use, there will
always be some latency. Usually, however,
the latency can be kept to an acceptable
amount by using the right combination of
sound generator and card, and by making the
appropriate settings.
For details on how to make these settings,
refer to the owner’s manuals for your software
and sound card.