HP Hewlett Packard Electronic Keyboard Princeton HP 21 User Manual

User’s Manual  
Princeton HP-21 DIGITAL PIANO  
 
Precautions  
Please read the following carefully before use:  
Do not expose the piano to high temperature, direct sunlight or excessive dust.  
Do not place the piano too close to appliances such as televisions and radios as these items may cause  
interference.  
Avoid excessive humidity and putting any liquids on top of the piano  
Always unplug AC cord by gripping the plug firmly, but not pulling on the cable.  
Do not apply excessive force to the switches and buttons.  
When the piano is not in use or during a thunderstorm, please disconnect the power supply.  
Maintain the volume at a comfortable level - we recommend you limit this to two-thirds of the  
maximum to prevent damage to your ears  
Unplug the power cable before cleaning the piano. Do not connect or disconnect the power cable with  
wet hands.  
Check and clean the power plug periodically.  
To avoid damage to the piano and other devices to which it is connected, turn the power switches of  
all related devices off prior to connecting or disconnecting cables.  
Clean the piano and remove the dust with a dry soft cloth or a slightly damp cloth.  
Never use cleaners such as thinner or alcohol. To prevent any damage on the surface of the LED  
display, please use lens cleaning tissue to clean the display.  
If the piano cable is damaged, please do not use the piano as it presents a fire or electrical hazard.  
If the piano malfunctions due to improper handling, please switch off, wait 30 seconds, and switch on  
again.  
Do not attempt to disassemble or repair the piano by yourself. If the piano does not work properly,  
please contact an authorized service technician.  
The piano should not be exposed to water, rain, liquids, etc.. Do not place any object filled with  
liquids on the piano.  
 
Contents  
Digital Piano Set-up Guide  
General Guide  
3-5  
6-7  
8
The Connectors  
- Using the AC power jack  
- Using Headphones  
- Using the MIDI OUT jack  
Operation  
8
8
8
9-13  
9
1. Power Switch & Volume  
2. Voice/Dual Voice  
3. Metronome  
9
9
4. DSP (Digital Signal Processor)  
5. Transpose  
10  
10  
10  
10  
11-12  
12-13  
13  
14  
14  
14  
15  
16  
16  
6. Tempo  
7. Touch Response  
8. Record & Playback  
9. Demo Song  
10. Foot Pedals  
MIDI  
- What is MIDI?  
- What can you do with MIDI?  
Specifications  
Voice List  
Demo Song List  
 
Digital Piano Set-up Guide  
1. Open the package, and check that you have the following parts:  
1. Piano body  
2. Music stand  
3. Right leg  
4. Left leg  
5. Back panel  
6. Foot pedal unit  
7. Hand screw (4 pcs.)  
8. Screws (8 pcs.)  
9. Screw caps (8 pcs.)  
10. Power cable stabling hook (2 pcs.)  
 
Digital Piano Set-up Guide  
2. . Follow the illustration below to setup your piano.  
A.  
Put the foot pedal unit(6) in between the left and right legs (3&4) . Use 4 screws (2 on each side) to  
attach the legs onto the foot pedal unit.  
(Make sure the position correct before tightening screws)  
B.  
Use 4 screws (2 on each side) to tighten the back panel (5) onto the  
finished assembly in Part A.  
 
Digital Piano Set-up Guide  
C.  
Put the piano body (1) on the top of the finished stand from part B. Use 4 hand  
screws to fasten the piano to the stand.  
D.  
After the initial set-up, adhere the cable stabling hook(10) on the internal side of the leg (see the below  
illustration for reference).  
Cable stabling hook  
 
General Guide  
Top View  
Rear View  
Front View  
1. Control Panel  
2. Pedal Jack  
3. MIDI IN/OUT Jack  
4. AUX. OUT Jack  
5. AC Power Jack  
6. Headphones Jack  
7. Soft Pedal  
8. Sostenuto Pedal  
9. Sustain Pedal  
10. Music Stand  
11. Piano Keyboard  
 
General Guide  
1) POWER SWITCH  
2) MASTER VOLUME  
3) DUAL  
16 VOICE TYPE & DEMO SONG SELECT  
0 - PIANO 1  
1 - PIANO 2  
4) DSP  
2 - E.PIANO 1  
5) TOUCH  
3 - E.PIANO 2  
6) RECORD  
7) TRACK A  
8) TRACK B  
9) REPEAT  
10) METRONOME  
11) TRANSPOSE +/-  
12) TEMPO +/-  
13) DEMO ALL  
14) RECORD  
- PLAY  
4 - HARPSICHORD  
5 - VIBES  
6 - STRINGS ENSEMBLE  
7 - CHORUS  
8 - JAZZ ORGAN  
9 - CHURCH ORGAN  
17 LED  
- TEMPO  
- SONG  
- TRANSPOSE  
- STOP  
15 DEMO  
- SELECT  
- START/STOP  
 
The Connectors  
Using the AC power jack  
1. Connect the power cable to the AC power  
jack on the underside of the piano.  
2. Ensure the piano is turned off when  
connecting and disconnecting the power  
3. Plug the power cable into an AC power  
outlet.  
4. Turn the volume switch counter-clockwise to  
reach the minimum volume level.  
5. If you have done the above procedures, it’s  
now safe to turn on the piano.  
Caution:  
When the piano is not in use or during a thunderstorm, disconnect the power for  
safety sake.  
Using Headphones  
1. There are two headphone jacks underneath  
the left hand side of the piano. When an  
optional set of stereo headphones is  
connected to headphone jack 2, the sound  
from the speakers is disconnected – so the  
sound is only heard in the headphones.  
Headphones  
Jack 1  
Headphones  
Jack 2  
2. When jack 1 is connected with stereo  
headphones, the sound can be heard from  
both headphones and the piano speakers  
Caution:  
Never use the headphone with high volume, as it may damage your sense of hearing.  
To prevent damage to the speakers, ensure that the volume is set to the  
minimum level before connecting the power and other devices.  
Using the AUX.OUT jack  
 
Connect the rear-panel AUX.OUT jack to  
amplified speakers, amplifiers or domestic  
hi-fi-units for external amplification.  
Note: Connect both left(L) and right(R) channels for stereo effect. If you only connect  
one of the channels, the connected channel will only take effect.  
either  
Using the Foot Pedals  
Connect the plug of the foot pedal unit to the pedal  
jack on the rear panel.  
Using the MIDI IN/OUT Jack  
MIDI stands for Musical Instrument Digital  
Interface. MIDI is a world wide standard that  
makes it possible for various electronic musical  
instruments and other devices.  
MIDI IN: Data transmitted from other MIDI  
instrument via MIDI is received at this  
terminal.  
MIDI OUT: Data produced by the Digital  
Piano is transmitted to other MIDI instruments  
via MIDI from this terminal.  
Operation  
 
1. Power Switch & Volume  
1. Turn the POWER  
The LED display lights up.  
switch  
on.  
2. Use the volume control switch to adjust the  
volume to your desired level  
Caution:  
If the LED display has not lit up after you turned on the piano, please check the power supply.  
If the piano is silent, the volume may be adjusted to its minimum level.  
Although the Main switch may be in the OFF position, the piano is not disconnected from the power  
supply completely!  
2. Voice/Dual Voice  
Select a voice by pressing one of the [VOICE  
TYPE] button, the corresponding indicator  
will light up and the number of the selected  
voice will appear on the LED.  
Press the [DUAL] button to enter the Dual  
Voice mode, then select the second voice by  
pressing a [VOICE TYPE] button.  
To exit the Dual Voice mode, press the  
[DUAL] button again.  
While recording, Voice 2 will turn off  
automatically.  
3. Metronome  
Press the [METRONOME] button to turn  
on/off the metronome function.  
You cannot use the metronome function when  
the DEMO song is playing.  
To turn off the metronome, press the [STOP]  
button.  
4. DSP (Digital Signal Processor)  
 
Press the [DSP] button to turn on/off the DSP.  
The status will appear on the LED.  
5. Transpose  
The Transpose function allows you to change  
the pitch of the instrument in semi-tone steps,  
up to a maximum setting of 12 semitones  
above or below standard pitch.  
To restore the normal Transpose position,  
press both the +/- buttons simultaneously.  
6. Tempo  
You can speed up or slow down the tempo of  
a song or metronome by pressing the  
[TEMPO +/-] buttons.  
To restore the default tempo, press both the  
+/- buttons simultaneously. When you press  
both  
the  
+/-  
buttons  
when  
the  
song/metronome is stopping, the tempo will  
return to 120.  
When you are adjusting the tempo, the tempo  
indicator will appear on the display.  
7. Touch Response  
 
There is a touch response function to set the  
default value for the keyboard touch.  
Press the [TOUCH] button to adjust the touch  
response level in the range of 1 to 3. 2 is the  
default level.  
To turn off the touch response function, press  
the [TOUCH] button repeatedly until "OFF"  
appearing on the display.  
8. Record & Playback  
Record  
Press the [RECORD] button to record. The  
record indicator lights up.  
There are 2 tracks for recording - track A and  
track B. Select and press [TRACK A] or  
[TRACK B] button to save your recording.  
To remove the recorded data and record again,  
press the [RECORD] and [TRACK A] or  
[TRACK B] simultaneously. Their indicators  
light up and flash.  
Play a key on the keyboard to start recording.  
To stop recording, press the [STOP] button.  
Playback  
Select and press the track you want to  
playback. Its indicator will light.  
To stop the playback, press the [RECORD -  
STOP] button.  
Press the [RECORD-PLAY] button to start  
playing back the track.  
 
Repeat the playback  
During the playback, press the [REPEAT] button  
to set the beginning point that you want to listen,  
"r-A" will appear on the display, then press the  
[REPEAT] button again to set the end point of the  
playback, "r-B" will appear on the display and the  
recorded song will playback repeatedly.  
9. Demo Song  
Select a Demo song  
Hold the [SELECT] button.  
The number of the current demo song will  
appear on the display.  
Use the  
Voice button  
twice to select  
a Demo song.  
Use the Voice Select buttons (0-9) to select  
your desired demo song. You must enter a  
2-digit number (00-19).  
Play the demo songs in sequence  
Press the [DEMO ALL] button to start  
playing the demo songs in sequence. To stop  
the demo songs, press the [DEMO ALL] or  
[START/STOP] button.  
When the demo song is playing, you can not  
change it to another one immediately.  
Select a track of the demo song  
While the demo song is playing, you can  
deactivate the corresponding track by  
pressing the [TRACK A] or [TRACK B]  
button.  
No sound will play if both tracks are  
deactivated.  
Press the track button again to play the demo  
song.  
 
Repeat the demo song  
When a demo song is playing, press the  
[REPEAT] button to set the beginning point  
that you want to listen. "r-A" will appear on  
the display, then press the [REPEAT] button  
again to set the end point of the  
playback."r-B" will appear on the display and  
the selected section of the demo song will  
playback repeatedly.  
This function does not work after pressing the  
[DEMO ALL] button and its songs are  
playing.  
Adjust the tempo of demo song  
When a demo song is playing, you can adjust  
its tempo by pressing the [TEMPO +/-]  
buttons.  
10. Foot pedals  
Sustain  
Pedal  
Soft  
Pedal  
The piano has 3 Piano foot pedals - soft pedal  
sostenuto pedal and sustain pedal.  
Sostenuto  
Pedal  
 
MIDI  
The MIDI connections are located at the rear panel of the unit.  
The following shows the description of MIDI and the steps of using MIDI.  
What is MIDI?  
MIDI stands for Musical Instrument Digital Interface. MIDI is a world wide standard that makes  
it possible for various electronic musical instruments and other devices, such as computers, to  
"communicate with each other".  
The keyboard is equipped with two types of MIDI  
connections, both are located on the rear panel.  
MIDI IN  
Data transmitted from other MIDI instruments via  
MIDI, is received at this terminal.  
MIDI IN/OUT  
Terminals  
MIDI OUT  
Data produces by the keyboard, is transmitted to  
other MIDI instruments via MIDI from this  
terminal.  
What can you do with MIDI?  
Record data by using the Auto Accompaniment on an external sequencer .  
After recording, you can edit the data with the sequencer.  
MIDI transmit  
MIDI OUT  
MIDI IN  
Play music from another keyboard .  
MIDI transmit  
MIDI OUT  
MIDI IN  
 
Specifications  
Keyboard  
88 hammer action keys  
Voice  
10 Voices  
Demo Song  
Display  
20 Demo Songs  
LED  
Switch and Buttons  
POWER SWITCH, VOLUME SWITCH, DUAL, DSP,  
TOUCH, RECORD, TRACK A, TRACK B, REPEAT,  
METRONOME, TRANSPOSE +/-, TEMPO +/-,  
DEMO ALL, RECORD - PLAY/STOP, DEMO - SELECT/  
START/STOP, VOICE SELECT 0-9  
+/-12 semi tones  
Transpose  
Pedals  
Soft, Sostenuto, Sustain  
Hard, Medium, Soft, Off  
Touch Response  
Connectors  
Speaker  
AC POWER, HEADPHONES, AUX.OUT, MIDI IN/OUT,  
PEDALS  
8ohm 25w x 2  
Dimension  
Weight  
54” x 20” x 33”  
136 Lbs  
 
Voice List  
No  
Name of Voice  
Name of Voice on Panel  
Demo Song List  
 
 

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