[請益] "grow and glow"

[hidede (We are X)]

如題
最近在翻譯一個音響器材的ptt講稿
看到這句話有點卡住

整句話是
When I do this the fader “grows and glows” giving me positive feedback that
fader is under my control.

大概了解意思
但我希望能用更精確的字句


請問有人知道這是一句成語或俗語嗎??0rz


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