Simple, compact, high-quality piano - a new addition to the ARIUS line
Elegantly slim digital piano in Dark Alder color with Graded Hammer Standard (GHS) keyboard with matte black keytops.
The colours and finishes shown may vary from those on the actual products.
Some colours may not be available in some countries.
- Graded Hammer Standard (GHS) keyboard with matte black keytops
- Advanced Wave Memory (AWM) Stereo Sampling
- Slim cabinet design
- Three Pedals with Half Pedal Control
- Built-in library of 50 piano songs
Enjoy the performance of the elegantly slim ARIUS YDP-S31. The cabinet design is equal parts form and function. Its silver key bed is cradled in Dark Alder finish...well-suited to both classic and contemporary interiors. And the Soft-Shut key cover also serves as a music rest. Thanks to the GHS (Graded Hammer Standard) keyboard with matte black keytops that exceptionally natural key touch virtually replicates that of an actual grand piano. Further, the built-in AWM stereo sampled instrument voices that fully reproduce the entire range - from the powerful lows to the delicate highs.
Features
Graded Hammer Standard (GHS) keyboard with matte black keytops
Just as on a traditional acoustic piano, the keys of the lower notes have a heavier touch, while the higher ones are more responsive to lighter playing. The matte finish of the black keys enhances keyboard's luxurious appearance.
More Features
Features
Graded Hammer Standard (GHS) keyboard with matte black keytops
Just as on a traditional acoustic piano, the keys of the lower notes have a heavier touch, while the higher ones are more responsive to lighter playing. The matte finish of the black keys enhances keyboard's luxurious appearance.
Advanced Wave Memory (AWM) Stereo Sampling
The AWM (Advanced Wave Memory) is a sampling system which creates sound close to that of an acoustic instrument by using digital technology to record the instrument sound and applying high-quality digital filter technology to the recorded audio samples. AWM Stereo Sampling creates a more spacious, deeper, and richer sound by using a pair of waveforms (L and R), obtained via a stereo recording process.
Variable Touch Sensitivity
Select the hard, medium or soft setting to match your playing style or finger strength. Turn off sensitivity for a fixed response setting, ideal when playing the organ.
Slim Cabinet Design
The cabinet depth of 30cm allows placement anywhere in your room. However, despite the small size, no compromises have been made in playability. Further, the keyboard cover doubles as a music score stand when opened. When the cover is closed, the instrument blends in naturally with your room interior.
Three pedal with Half-Pedal Control
The built-in soft, sostenuto, and damper pedals complete the piano playing experience. The damper pedal provides an authentic "half damper" effect, giving you nuanced expressive control over the sustained sound.
50 Preset Piano Songs
A selection of 50 different piano songs is provided for your listening pleasure. These recordings were chosen for their beauty as well as their functionality. Since many of the songs are classic piano pieces, anyone taking lessons can listen to them for reference.
Song Recorder
The built-in, 1-track performance memory allows you to record a backing track, and then step into the spotlight and solo over it. Best of all, you can change tempo or voices even after you've recorded your performance. There's also a built-in metronome to help you stay in perfect time.
Audio & Video
Online Services
The quality, sound and playability of Yamaha instruments can take your music to new heights. With Yamaha’s Online Services, you’ll go even further. The power of the internet opens up a whole world of new possibilities for Yamaha’s instruments, and your music making. Whether you want to learn to play your favorite songs, explore new ways to enhance your performances, or simply listen to beautiful music on your instrument, you’ll find a way to do it with Yamaha’s Online Services.
PianoSoft Solo

With PianoSoft Solo you can experience your favorite songs like never before - hear artists like Elton John and The Beatles, Beethoven and Bach performed on your piano by award winning pianists such as Hamish Milne and Frederic Chiu. Exact acoustic reproduction of original piano performances means that when you load PianoSoft Solo on your Disklavier you’re hearing a live performance right in your living room.
Some of our most popular PianoSoft Solo albums:
What’s next?
Where to find Online Services for Yamaha Musical Instruments
Yamaha MusicSoft is Yamaha’s official online shop for new song downloads, expansions voices, music software and more for your Yamaha piano or keyboard.
Browse Yamaha MusicSoft
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Specs
Size/Weight
| Dimensions |
Width |
1,390mm (54-3/4") |
| Height |
Key cover closed 783mm (30-13/16") / Key cover open 982mm (38-11/16") |
| Depth |
299mm (11-3/4") / anti-fall brackets attached 370mm (14-9/16") |
| Weight |
Weight |
36kg (79lbs., 6oz.) |
Control Interface
| Keyboard |
Number of Keys |
88 |
| Type |
Graded Hammer Standard (GHS) Keyboard with matte black keytops |
| Touch Sensitivity |
Hard/Medium/Soft/Fixed |
| Pedal |
Number of Pedals |
3 |
| Half Pedal |
Yes |
| Functions |
Damper, Sostenuto, Soft |
| Panel |
Language |
English |
Cabinet
| Key Cover |
Key Cover Style |
Soft-shut |
| Color/Finish |
Dark Alder |
| Music Rest |
Yes |
Voices
| Tone Generation |
Tone Generating Technology |
AWM Stereo Sampling |
| Polyphony |
Number of Polyphony (Max.) |
64 |
| Preset |
Number of Voices |
6 |
Effects
| Types |
Reverb |
Yes |
| Functions |
Dual/Layers |
Yes |
Songs
| Preset |
Number of Preset Songs |
50 |
| Recording |
Number of Songs |
1 |
| Number of Tracks |
1 |
| Data Capacity |
65KB (ca. 11,000 notes) for User Song |
| Recording Function |
Yes |
| Compatible Data Format |
Playback |
Original Format, SMF(Format 0) |
| Recording |
Original Format |
Functions
| Overall Controls |
Metronome |
Yes |
| Tempo Range |
32 - 280 |
| Transpose |
-6 to 0, 0 to +6 |
| Tuning |
Yes |
Storage and Connectivity
| Storage |
Internal Memory |
352KB |
| Connectivity |
Headphones |
x 2 |
| MIDI |
In/Out |
Amplifiers and Speakers
| Amplifiers |
6W x 2 |
| Speakers |
(12cm x 6cm) x 2 |
Accessories
| Included Accessories |
Song Book |
"50 greats for the Piano" |
Support
Downloads
Contacts
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