行腔 meaning in English

(of an actor) use the tunes according to one's own understanding

Secondly , when this method is used widely , the steady nanbeiqu melody would gradually collapse
而“依字声行腔”方式的普遍使用，其后果是导致古曲牌定腔逐渐消解。
The process is , firstly , there is much improperness in literati lyrics , which makes the player must use a method called " sing according to the tone of characters " to sing the melody
其过程为：文人曲词中存在着大量的出律现象，这导致歌场上普遍使用“依字声行腔”的方式，如此才方便将曲作原词搬上舞台，并避免歌者“拗嗓” 。