谷歌Logo标题声音节奏动画AE MG教程 Google Sound Response Animation谷歌新Logo色块随音频跳动动画，将音频转换成关键帧，然后链接到线条长度变化中we’ll be creating sound activated shape layers inspired by the new Google animations for the new logo using After Effects.

教程中用到的表达式：第一个:aInp=thisComp.layer(“Audio Amplitude”).effect(“Both Channels”)(“Slider”);aInp.valueAtTime(time-(index/24))*4+.000­1第二个:inp=content(“Shape 1″).content(“Trim Paths 1″).start;linear(inp,0,100,180,0);