Roland SH-201 - Manual (Page 55)

55
Using the SH-201 together with your computer or another sound module
Using the SH-201 together with your computer or another sound module
Note when using USB MIDI
The number of notes that can be played simultaneously (i.e., the polyphony) may decrease when you’re using
USB MIDI or when connected via MIDI (p. 58). This occurs when the MIDI messages produced when you play
the SH-201’s keyboard are routed through your computer or external MIDI device and then back to the SH-201,
causing the SH-201’s sound generator to play a “duplicate” note.
To prevent this problem, you can either turn off the MIDI Thru function of the connected device, or set the
KEYBOARD parameter (p. 69) LOCAL SWITCH setting “OFF.”
USB audio signal flow is shown in the illustration below.
USB audio signal flow
fig.USB-Driver.e
What is the USB driver?
The USB Driver is a software which passes data
between the SH-201 and the application (sequencer
software, etc.) that is running on the USB-connected
computer.
The USB Driver sends data from the application to
the SH-201, and passes data from the SH-201 to the
application.
Application
USB
Driver
Computer
USB connector
USB cable
USB connector
SH-201
SH-201
Keyboard
SH-201
Sound Generator
Disconnected
(LOCAL SWITCH: OFF)
(External)
Sequencer
SH-201
Keyboard
SH-201
Sound Generator
(LOCAL SWITCH: ON)
(External)
Sequencer
Sounded in duplicate Sounded once
INPUT jacks OUTPUT jacks
USB connector
USB Audio
IN
USB Audio
OUT
AUDIO FILTER
(Stereo)
(Stereo)
INPUT jacks OUTPUT jacks
USB connector
USB Audio
IN
USB Audio
OUT
OSC
EXT IN (Mono)
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