Xylophone-like, piano-like, and violin-like
Is there a word or expression for a musical instrument which,
like a xylophone or a set of bells, has set pitches (fixed frequencies) that no one can change or adjust (except by some extraordinary measure like sandpapering the bars),
like a piano, has pitches that can be changed by a tuning professional but are set for the performer, and
like a violin, can give the performer any pitch he wanted in some range.
If you had these words you could ask a question like, 'Is a trumpet a piano-like or violin-like instrument,' or make a statement like, 'a guitar is somewhere between piano-like and violin-like.'
The word need not be an adjective.
I am not asking what would be a good word we can start using for these things. I am asking, if music theory, physics or any other discourse already has such words or expressions, what are they?
Please excuse my ignorance if, for instance, a xylophone can be easily tuned or a guitar is not meant to be violin-like at all.
According to the musical classification system by André Schaeffner, all three would be classified as Category I, making sound from vibrating solids (as opposed to vibrating air), and further classified as follows:
- xylophone-like instruments are classified as I.A: no tension; and
- all the others are classified as I.C: chordophones, which are solids fixed at both ends.
We can then move to the Hornbostel-Sachs classification system to find the entry chordophones and work through the categories to find String instruments, in which violins, pianos, etc each has its own entry.
This doesn't really help with the classification system you're after, but this new world encyclpedia entry might. It uses the term stoppable strings to distinguish the piano from violins and guitars. The idea comes from being able to "shorten the vibrating length of the string".
You ask,
I am not asking what would be a good word we can start using for these things. I am asking, if music theory, physics or any other discourse already has such words or expressions, what are they?
It would appear that the standard classification systems don't classify in this manner, but based on the above, the following terms appear to be at least standard and understandable:
- xylophone-like: solid, no tension instrument under the André Schaeffner classification system (I.A);
- piano-like: chordophone whose strings are not stoppable; and
- violin-like: chordophone with stoppable strings.