Audio
### Clean Audio = Believable Video

> Viewers forgive shaky images far sooner than noisy sound.

Note:
Start by playing two identical clips—one with background hiss, one cleaned—and ask which looks “more professional.”

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Audio
#### 1. Capture at the Source

* Use the best mic available; position 15–30 cm from mouth.
* Monitor with headphones; peaks should stay below –6 dB.
* Record at least 10 s **room‑tone** in every location.

Note:
Emphasise that good capture saves hours in post; show how red‑lined peaks distort irreversibly.

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Audio
#### 2. Room‑Tone & Noise Control (Audacity)

1. Import clip.
2. Select clean room‑tone → **Effect ▸ Noise Reduction ▸ Get Profile**.
3. Select entire track → repeat Noise Reduction (6–12 dB reduction, Sensitivity 6, Frequency Smoothing 3).
4. Apply **High‑Pass Filter 80 Hz** to remove rumble.

Note:
Warn that over‑reduction causes “swirly” artefacts—dial Sensitivity down if it sounds robotic.

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Audio
#### 3. Equalize & Compress

* Roll off <80 Hz; dip 4 kHz to tame harshness.
* Compressor: Threshold ‑6 dB, Ratio 3:1, Attack 10 ms, Release 150 ms.
* Limit peaks to ‑1 dB; aim for dialogue ≈‑12 LUFS.

Note:
Show LUFS meter in Kdenlive (View ▸ Audio Meter) and explain web loudness target (‑14 LUFS) versus broadcast (‑23 LUFS).

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Audio
#### 4. Sync & Layering

* Align tracks via the **hand‑clap spike** in waveforms.
* Keep voice‑off on dedicated top audio track; ambience/FX below.
* Add 3‑frame fades at every cut to kill pops.

Note:
Demo Kdenlive’s *Align Audio to Reference* for quick waveform sync—the same tool used in multicam earlier.

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Audio
#### 5. Export Best Quality

* Export **WAV 48 kHz 24‑bit** from Audacity.
* In Kdenlive Render: AAC 48 kHz, 192 kb/s (YouTube preset is fine).
* Watch meters during render; ensure no clipping.

Note:
Clarify that archive masters stay lossless; delivery formats can be lossy.