Connecting A Personal Computer - Yamaha YPT-420 Owner's Manual

Connecting to a Computer
● Channel Messages
This instrument is capable of handling 16 MIDI
channels simultaneously—meaning it can play up
to sixteen different instruments at the same time.
Channel messages transmit information such as
Note ON/OFF, Program Change, for each of the 16
channels.
Message Name Instrument Operation/Panel Setting
Performance data of the keyboard (contains
Note ON/OFF
note number and velocity data)
Instrument selection (including bank select
Program Change
MSB/LSB, if necessary)
Control Change Instrument settings (volume, pan, etc.)

Connecting a Personal Computer

The following functions become available when this instrument is connected to a computer.
● Performance data can be transferred between the instrument and the computer (page 87).
● Files can be transferred between the instrument and the computer (page 89).
The connection procedure is as follows:
1
Install the USB-MIDI driver on your com-
puter.
The USB–MIDI driver is included on the CD-ROM.
Installation of the USB MIDI driver is described on
page 92.
2
Connect the USB terminal of the computer
to the USB terminal on the instrument using
a standard USB cable (USB cable sold sep-
arately).
The supplied CD-ROM also includes a Musicsoft
Downloader application that allows you to transfer
song files from your computer to the instrument's
flash memory. For instructions about how to install
Musicsoft Downloader and how to transfer song
files, see page 90.
86
YPT-420 Owner's Manual
Instrument
USB cable
● System Messages
This is data that is used in common by the entire
MIDI system. System messages include messages
like Exclusive Messages that transmit data unique
to each instrument manufacturer and Realtime
Messages that control the MIDI device.
Message Name Instrument Operation/Panel Setting
Exclusive Message Reverb/chorus settings, etc.
Realtime Messages Start/stop operation
■ Precautions when using the [USB] termi-
nal
When connecting the computer to the [USB] termi-
nal, make sure to observe the following points.
Failing to do so risks freezing the computer and
corrupting or losing the data. If the computer or the
instrument freezes, restart the application software
or the computer OS, or turn the power to the instru-
ment off then on again.
CAUTION
• Use an AB type USB cable of less than about 3 meters.
• Before connecting the computer to the [USB] terminal, exit from
any power-saving mode of the computer (such as suspended,
sleep, standby).
• Before turning on the power to the instrument, connect the com-
puter to the [USB] terminal.
• Execute the following before turning the power to the instrument
on/off or plugging/unplugging the USB cable to/from the [USB]
terminal.
• Quit any open application software on the computer.
• Make sure that data is not being transmitted from the instru-
ment. (Data is transmitted whenever you play notes on the
keyboard or play back a song, etc.)
• While a USB device is connected to the instrument, you should
wait for six seconds or more between these operations: (1) when
turning the power of the instrument off then on again, or (2) when
alternately connecting/disconnecting the USB cable.
NOTE
• The Musicsoft Downloader application may not be able to access the
instrument in the following cases:
• During style playback.
• During song playback.