音轨

Traditional form:

音軌

Pinyin (reading):

yīnguǐ

Definitions:

• sound track
• track number (e.g. on a CD)

Characters:

• 音 - sound, tone, pitch, pronunciation
• 轨 - track, rut, path

Traditional characters:

• 音 - sound, tone, pitch, pronunciation
• 軌 - track, rut, path