A low key picture is almost entirely at the dark end of the tonal scale, and there are only small areas of light tone.

暗调图片上的色调差不多全在色调梯尺的黑色部份，白色只占很少面积。

youdao

To be tonal, music must be based on a scale.

为了做到有调性，音乐必须以一个音阶为基础。

youdao

In chapter two, three aspects of the Zheng art including the theme, playing techniques and the traditional tonal form and scale are presented.

在第二章中，笔者从题材、演奏技法和传统筝曲的调式音阶三个方面就传统古筝艺术的表现形式进行论述。

youdao

Schoenberg, by contrast, sought to express his inmost feelings in a raw, unmediated way instead of using large-scale tonal architecture to shape them into conventionally coherent structures.

WSJ: The Seductive Lure of Abstraction | Sightings by Terry Teachout