Original music-bed ducking exercise

Keep the accepted voice as a separate file. Review its actual activity times in your editor. Do not substitute subtitle display intervals for measured voice activity.

Example
Original six-second mathematical chord at24000Hz mono. Manual activity intervals1to2.4and3.4to4.8seconds. Reduction-12dB; linear-amplitude fade down120ms before start, fade up450ms after end. Overlapping envelopes take the lower gain, not stacked reductions.

Output
NewPCM16WAV, same sample rate/channel count/frame count. No resampling, normalization, voice mix or metadata copy. File-edge fades stop at the original boundaries. Preview dry and reduced files and then listen with the accepted voice in your editor.

Scope
No speech, model inference, paid generation or AI speech detection. Tone and planned timings illustrate processing only. No universal mix settings or loudness certification.