Lyrics: Morning light upon the sill / Little footsteps, quiet still / Open windows, start again / Let a small new day begin. Style: gentle clear lead vocal over the supplied instrumental. Compare two actual Audio Strength values; no promise of sample-perfect backing preservation.

1. 保存原创器乐伴奏与歌词，记录鼓点及和声参照
2. 从合格器乐音轨的More Actions > Remix进入Add Vocals
3. 填写歌词和器乐加人声的风格描述，记录第一档Audio Strength
4. 固定输入与歌词，比较第二档Audio Strength结果
5. 逐句听人声并对照原伴奏，记录被改动的鼓点和和声
6. 下载真实样曲与参数，输出对照表，不声称原伴奏逐采样保真

Target account execution: not performed. Save actual output separately.
