The total number of syllables in some varieties is therefore only about a thousand, including tonal variation.

The lack of textural and tonal variation made photographs difficult to interpret.

However, she was still struggling to understand the tonal variations.

This system could produce tonal variations in the prints.

All had some tonal variation, but she had never heard such a range of musical tones before.

It produces a sound that is loud and severe, with few tonal variations.

Rules for the operation of the tonal variations are as follows:

He spoke in good enough English, but it lacked tonal variation.

Generally, listening to a voice with little tonal variation is boring and unpleasant.

Her interpretations are known to be very passionate but at the same time well structured and with a wide range of tonal variation.