PSS-A50 Owner’s Manual
Creating Music with MIDI
By connecting this instrument to a computer via
USB cable, you can record performances on this
instrument as a MIDI Song to music production
software on computer, or use this instrument as a
master keyboard to enter data on music produc-
tion software. These features greatly expand your
music creation and performance possibilities. For
details on MIDI, refer to the online PDF manual
“MIDI basics” on the Yamaha website.
• Windows 7, 8.1, 10
• Mac OSX 10.12, 10.13, 10.14
1Turn off Local Control (page 12; MIDI settings)
2Connect this instrument and the computer with
the USB cable. For connection, see page 6.
3Start recording to the music production soft-
ware and play this instrument.
• Windows is a registered trademark of Microsoft® Cor-
poration in the United States and other countries.
• Mac is trademark of Apple Inc., registered in the U.S.
and other countries.
* The contents of this manual apply to the latest specifications as of the
publishing date. To obtain the latest manual, access the Yamaha
website then download the manual file. Since specifications,
equipment or separately sold accessories may not be the same in
every locale, please check with your Yamaha dealer.
• Be sure to read “Precautions when Using the [5V DC/
USB TO HOST] Terminal” in the MIDI Reference (page 6)
before using the [5V DC/USB TO HOST] terminal.
• When turning Local Control to off, sound will not be
produced from the keyboard.
• If your computer is having difficulty communicating with
the instrument, download the standard Yamaha USB-
MIDI driver from the following web page and install it on
• For details on the MIDI transmit channel of the performance
data, refer to the MIDI Reference document (page 6).
• Playing a recorded Phrase will transmit the correspond-
ing MIDI data.
• If the velocity parameter doesn’t reach a value of 127 as
needed, set Touch Response to “1.”
No sound, too soft
sound or choppy sound
See the text in the
on pages 7 and 9.
Product name Digital keyboard
Keyboard 37 HQ (High Quality) Mini Keys
Touch Response Soft, Medium, Hard, Fixed
Voices Preset: 40 Voices + 2 Drum Kits
Polyphony (Max.): 32 notes
Yes (-04 – +04)
Motion Effect, Portamento, Sustain
Metronome: Yes, Tempo: 11 – 280,
Transpose: -12 – +12,
Tuning: 427.0 – 440.0 – 453.0 Hz
(approx. 0.2 Hz increments)
(MIDI data only; audio not
• Number of Phrases: 1 (approx. 700
notes; fewer when recording using effects
such as Motion Effect)
Display LED display
Connectivity Headphones/Output (stereo mini),
5V DC/USB TO HOST (USB micro B)
Amplifiers 1.4 W
Speakers 8 cm x 1
• USB bus power 5V/500mA
• USB power adaptor 5V/500mA
• Four “AA” size alkaline (LR6),
manganese (R6) or Ni-MH
rechargeable (HR6) batteries
Power Consumption 1.5 W
Auto Power Off Yes
(W x D x H)
506 mm x 201 mm x 54 mm
(19-15/16” x 7-15/16” x 2-1/8”)
Weight 1.2 kg (2 lb, 10 oz)
(not including batteries)
Included Accessories Owner’s Manual, USB cable,
Online Member Product Registration
(May not be available
depending on your area.)
The following settings are maintained
even when the power is turned off.
Phrase, Master Volume Level, Tuning,
Touch Response, Battery Type, Auto
Power Off setting, MIDI Settings (other
than Local Control)
When disconnecting the USB power adaptor,
or low (or no) battery power, backup is not exe-
This operation initializes the
backup data. While holding
down the highest white key
on the keyboard, simultane-
ously press the [ ]
(Standby/On) switch to turn
the power on so that “CLr”
will be displayed.