Accessory CD-ROM Installation Guide
YPT-420 Owner’s Manual
97
• Did you install the driver? (page 94)
• Is the USB cable connected correctly?
• Are the volume settings of the instrument,
playback device, and application program set
to the appropriate levels?
• Have you selected an appropriate port in the
sequence software?
• Are you using the latest USB MIDI driver?
The latest driver can be downloaded from the
following web site.
http://music.yamaha.com/download/
• Does your computer satisfy the system
requirements?
• Is any other application or device driver run-
ning?
• Do not suspend the computer while the MIDI
application is running.
If you are using Windows 2000, you may not be
able to suspend/resume normally, depending on
the particular environment (USB Host
Controller, etc.). Even so, simply disconnecting
and connecting the USB cable will allow you to
use the instrument functions again.
[Windows 2000/XP]
1
Disconnect all USB devices from the com-
puter except for the mouse and keyboard.
2
Start the computer and log on to the
Administrator account.
Exit from any open applications and close all
open windows.
3
From the [Start] menu, select ([Settings]
➔
) [Control Panel]
➔
[Add or Remove Pro-
grams] to display the Add or Remove Pro-
grams panel.
4
Click “Change or Remove Programs”
located in the upper left, then select
“Yamaha USB-MIDI Driver” or “Yamaha
Musicsoft Downloader” from the list in the
right panel.
5
Click [Remove].
A dialog box appears. Follow the instructions
to remove the software.
[Windows Vista/7]
1
Disconnect all USB devices from the com-
puter except for the mouse and keyboard.
2
Start the computer and log on to the
Administrator account.
Exit from any open applications and close all
open windows.
3
From the [Start] menu, select the [Control
Panel]
➔
[Programs and Features] or
[Uninstall a program] to display the “Unin-
stall or change a program” window.
4
Select “Yamaha USB-MIDI Driver” or
“Yamaha Musicsoft Downloader” from the
list.
5
Click [Uninstall].
If the “User Account Control” window
appears, click [Allow] or [Continue].
A dialog box appears. Follow the instructions
to remove the software.
When controlling the instrument from your
computer via USB, the instrument does not
operate correctly or no sound is heard.
Playback response is delayed.
Cannot suspend or resume the
computer correctly.
How can I remove the software?
95