tone language
tonal language

He writes in a tonal musical language, so you can say it is conservative.

It is a tonal language with 6 kinds of tones.

Here the composer, giving up the struggle to stay current, returned to the essentially tonal language in which he was most comfortable.

Second, as with any tonal language, one must learn not to vary the tone according to the context.

In a tonal language, pitch differences are used to distinguish one word from another.

It begins as an innocent pastoral work in an essentially tonal language.

In some circles, his essentially tonal language would be considered conservative.

We suspect it's more of a tonal than written language.

It is a tonal language with eight tones and a rather rich set of vowels.

It is a tonal language with two level tones, High and Low.