Voice & Music
Ch12 Voice & Music: AI Dubbing, Voice Cloning, and Copyright-Safe Audio
Great visuals with robotic voice-over will kill audience retention instantly. Voice and music are the most underrated — yet critically important — elements of AI short drama production. The right voice makes an AI-generated character feel alive; the right BGM can triple the emotional impact of an ordinary scene. This chapter covers the complete professional audio workflow from tool selection to practical implementation.
AI Voice Tool Comparison
| Tool | Chinese Quality | Emotional Range | Voice Cloning | Price | Best For |
|---|---|---|---|---|---|
| ElevenLabs | ★★★☆☆ | ★★★★★ | Yes | From $5/mo | English overseas content, emotional monologues |
| Fish Audio | ★★★★★ | ★★★★☆ | Yes | Pay per use, affordable | Chinese short drama, best-in-class voice cloning |
| CapCut AI Voice | ★★★★★ | ★★★★☆ | Limited | $7-14/mo membership | In-editor workflow, subtitle sync |
| Azure TTS | ★★★★★ | ★★★★☆ | Yes | Per-character billing, free tier available | Bulk API production, lowest unit cost |
Voice Cloning Walkthrough
[Fish Audio API — Batch Voice Generation]
import requests
FISH_API_KEY = "your_api_key"
VOICE_ID = "your_cloned_voice_id"
def generate_voice(text: str, output_file: str):
response = requests.post(
"https://api.fish.audio/v1/tts",
headers={
"Authorization": f"Bearer {FISH_API_KEY}",
"Content-Type": "application/json"
},
json={
"text": text,
"voice_id": VOICE_ID,
"format": "mp3",
"mp3_bitrate": 192,
}
)
with open(output_file, "wb") as f:
f.write(response.content)
dialogues = [
("001", "You think you have a choice?"),
("002", "I'll prove myself."),
]
for shot_id, text in dialogues:
generate_voice(text, f"voice_{shot_id}.mp3")
[WARNING] Legal boundary: Cloning another person's voice for commercial content requires their written consent. Cloning public figures' voices without authorization may violate personality rights. The safest approach: train on your own voice, or license voices from professional voice banks.
Genre Voice Style Guide
-
CEO/Power Romance: Male lead — deep, magnetic, slow cadence, controlled intensity. Female lead — clear but strong, emotional layers, quiet resilience.
-
Sweet Romance: Male lead — warm, low but gentle, slightly playful. Female lead — soft, lively, rapid emotional shifts, expressive.
-
Thriller/Mystery: Both — suppressed, tense, variable pace (builds anxiety), slight vocal tremor for fear moments.
BGM Selection Methodology
| Emotional Scene | Music Type | Description |
|---|---|---|
| CEO entrance / power display | Dark Orchestral | Low strings + brass, slow heavy beat |
| Sweet interaction / heart flutter | Soft Piano / Acoustic Guitar | Gentle melody, warm and bright tone |
| Emotional breakdown / parting | Emotional Strings | Sad flowing melody, fading ending |
| Suspense / plot twist | Thriller / Suspense | Irregular rhythm, dissonance, sudden silence |
| Triumph / revenge moment | Epic Cinematic | Strong drums + rising strings, clear emotional peak |
Copyright-Safe Music Sources
| Source | Price | License | Best For |
|---|---|---|---|
| CapCut Library | Included in membership | Content posted via CapCut | Douyin/WeChat content |
| Epidemic Sound | $15/mo | All platforms, commercial | YouTube/TikTok overseas |
| NCS | Free | YouTube royalty-free, attribution required | YouTube overseas |
| Artlist | $199/yr | All platforms, perpetual | Premium commercial production |
[CAUTION] Never do this: Using any pop song even for a few seconds, using "slightly altered" covers of recognizable songs, or using AI-sung covers of copyrighted songs — all of these trigger Content ID systems on Douyin and YouTube and will get your video removed or account restricted.
Sound Effects: Three Layers
-
Layer 1 — Transition SFX: Cinematic whoosh, flash sound, clock tick — signals scene changes
-
Layer 2 — Emotional SFX: Bass hit (shock), stinger (twist), piano tone (heart flutter), drone (suspense)
-
Layer 3 — Ambient Sound: Air conditioning hum, keyboard clicks, distant traffic — the invisible layer that makes scenes feel real. Keep at -20 to -30dB below dialogue.
[TIP] Chapter Action Checklist:
- Register on Fish Audio and test voice cloning with a 30-second clean recording;
- Generate AI voiceover for 5 lines of dialogue from your first scene;
- Download 3 BGM tracks from CapCut library or Epidemic Sound (tense/sweet/sad);
- Use CapCut's auto-beat detection to align a 20-second clip edit with BGM;
- Add transition and emotional SFX and compare the viewing experience before and after.
← PreviousCh11 Storyboarding Next →Ch13 AI Editing with CapCut