Fred Coulter
Collector of ancient keyboards
Occasionally I see someone explaining how the 3 octave, or 4 octave, or 5 octave keyboard just isn't big enough for "serous" musicians. (I seldom see this about a 73 or 76 note keyboard.) I think they're missing the point.
First, let's talk about five octave keyboards not being big enough for serious music. The modern classical organ keyboard is five octaves, from C to C. The modern harpsichord is also five octaves, but (generally) from F to F. The vast majority of classical keyboard music is playable on a five octave keyboard.
Generally, the three octave keyboards I've seen are on monophonic synthesizers. A monophonic synthesizer is, by its very nature, a melody instrument. Almost all melody instruments are limited to three (or fewer) octaves of usable space.
So these keyboards are fine for their functions.
But looking at the keyboard size by itself is missing the bigger picture. If a keyboardist is looking at a three octave keyboard, it's probably in addition to an existing keyboard. So the question really should be what's available to the player. If you've got two monophonic three octave keyboards, you're going to be extremely limited in the music you create. (I wonder if you can have a career playing Bach Two Part Inventions?) But two modern four octave keyboards? While you couldn't play classical piano, you'd probably have no problem in a band situation.
Two five octave keyboards? Again, this would be fine for almost everything, but you won't be able to play organ music without a proper pedal board, and some organ music really does need a third (or even fourth) keyboard. (My daughter just played her first hymn on an organ. Right hand gets the soprano and alto lines, left hand plays the tenor, while the feet play the bass. She says it took her five minutes to make it through the hymn.)
If you grew up on a piano, you'll probably be more comfortable with an 88 note keyboard. But that is a matter of individual comfort, not of musical limitations.
So don't condemn a keyboard based on the number of keys. The real question is what you're planning on doing with it. If it works for you, then the keyboard size is fine.
First, let's talk about five octave keyboards not being big enough for serious music. The modern classical organ keyboard is five octaves, from C to C. The modern harpsichord is also five octaves, but (generally) from F to F. The vast majority of classical keyboard music is playable on a five octave keyboard.
Generally, the three octave keyboards I've seen are on monophonic synthesizers. A monophonic synthesizer is, by its very nature, a melody instrument. Almost all melody instruments are limited to three (or fewer) octaves of usable space.
So these keyboards are fine for their functions.
But looking at the keyboard size by itself is missing the bigger picture. If a keyboardist is looking at a three octave keyboard, it's probably in addition to an existing keyboard. So the question really should be what's available to the player. If you've got two monophonic three octave keyboards, you're going to be extremely limited in the music you create. (I wonder if you can have a career playing Bach Two Part Inventions?) But two modern four octave keyboards? While you couldn't play classical piano, you'd probably have no problem in a band situation.
Two five octave keyboards? Again, this would be fine for almost everything, but you won't be able to play organ music without a proper pedal board, and some organ music really does need a third (or even fourth) keyboard. (My daughter just played her first hymn on an organ. Right hand gets the soprano and alto lines, left hand plays the tenor, while the feet play the bass. She says it took her five minutes to make it through the hymn.)
If you grew up on a piano, you'll probably be more comfortable with an 88 note keyboard. But that is a matter of individual comfort, not of musical limitations.
So don't condemn a keyboard based on the number of keys. The real question is what you're planning on doing with it. If it works for you, then the keyboard size is fine.