The Keyboard Keyboard is impeccable, the velocity is about all 76 keys absolutely evenly and also can be adjusted even in three stages. Unique likely support an analog half pedal his, but which is not supplied. Piano players should know that the keys do not have full size, but slightly shorter and slightly narrower than standard piano keys, however.
The removed from the Yamaha grand piano piano sound beats anything I've heard in this price range, comes via the built-in speaker but not the full. Here we recommend the use of high quality Hi-Fi headphones. The limits only become apparent in the use of the pedal. Although the dominant tones are kept, Sympathetic strings, as can be heard at a right wing, will not be replicated.
Also nice is the dual function, which can be additionally failed in strings, for example, the piano sound. What you Allerding fast approaching the limits of only 32stimmingen polyphony of NP-31. The pre-installed in the device classic demo piano pieces were recorded reasonable and sound convincing.
About the MIDI input, the NP-31 can be driven also as a tone generator, but this falls a gripe on: While the keyboard has a built-in metronome, MIDI no percussive sounds are available, making it difficult to shoot with an external MIDI metronome , At the utility as a MIDI master keyboard via the MIDI output but there is nothing to complain about. I have it connected via an ESI MIDIMATE II to the USB interface. The use of inexpensive USB adapter is not recommended.
Overall, the Yamaha NP-31 is indeed equipped quite spartan, but what is there, makes a convincing impression. Who the functionality is not enough, get to the NP-V80 already for 100 EUR more a full-fledged workstation.