It is evident that a digital piano is a replica of an acoustic piano. But it doesn't mean that its sound quality is almost as close as to the "real thing." Fortunately, digital keyboards are continuously evolving.
One particular improvement it got is the polyphony. Specifically, this component determines the number of notes that a piano can play at a time.
The better the polyphony of the instrument, the more sophisticated the notes it can emulate. If you are trying to explore complex techniques, you better choose those that have 64-note or 128-note polyphony.
But for beginners, those models that have "little" polyphony could already work.
The sounding of a digital piano is quite dependent on the sampled sounds that it has. After all, the goal of this instrument is to emulate the complex tonal characteristics of an acoustic piano.
Unfortunately, it would be difficult for a digital piano to achieve this, considering that it doesn't have the parts of a genuine piano.
Manufacturers solved this problem by integrating the technology called sampling. This particular feature is the process of recording sounds for playback. But the recorded sound would be insufficient if doesn't have enough "rate" and "depth."
Specifically, the sample rate is the number of times that a sound was sampled. The higher the rate, the lesser the tendency of the music to drop notes.
Keys of the Piano
A digital piano can efficiently copy the "feel" of an acoustic piano through its keys. If you tried playing a grand piano before, you probably know the smoothness of its keys.
Of course, you would also want this feature to be present on your digital piano. Luckily, it is a possible thing, as long the keys of your piano have "weights."
A piano with weighted keys brings a better experience to it users compared to those models that don't have this feature. In fact, playing the latter would just give you a bad time.
On the other hand, you can determine if the device has weighted keys if they offer resistance when you press them down.
Meanwhile, you should also decide the number of keys that your piano should have. For example, the Casio CTK 2090 is a 61-key digital piano. Therefore, it is a good practice instrument for beginners.
But for advanced practitioners, they should go with 76-key or 88-key pianos. They can offer versatility and accessibility to various piano chords and notes.
It wouldn't be too bad if your digital piano comes with a headphone jack. This feature allows you to play your instrument without bothering the people around you.
Moreover, the headphone jacks would enable you to practice with your teacher. You can clearly hear all the passages as long as you have this one.