Voice Changer Pro

Replace each speaker’s voice independently in a multi-speaker recording — or in a whole talking video — preserving the original emotion, cadence, and timing for every speaker.

Overview

The Voice Changer Pro node uses ElevenLabs Speech-to-Speech to re-voice multi-speaker media. It detects each speaker in the recording by first-appearance order, then applies your ordered list of target voices — voice 1 recasts speaker 1, voice 2 recasts speaker 2, and so on. Speakers without a mapped voice pass through unchanged.

Like Voice Changer, it operates in two modes, chosen automatically by what you wire in:

• Audio mode — wire audio in, get re-voiced audio out. Each detected speaker is independently revoiced with the corresponding target voice.
• Video mode — wire a video in, get the video back with new voices (plus the new audio track on a separate handle). The node demuxes the audio, runs per-speaker speech-to-speech, and remuxes the result onto the original video — no separate extract-audio / merge-video nodes needed.

In both cases the target voices’ identities are applied while the original pacing, intonation, and emotional delivery are preserved.

How separation works. Voice and music are always separated first — before recasting, the source is split into an isolated vocal stem and a music/SFX stem. Preserve Background does not control whether the split happens — only whether the music/instrumental stem is mixed back in under the new voices afterward.

Cloud edition only. Voice Changer Pro requires a Cloud subscription.

Configuration

Node-level settings

Field	Type	Default	Description
Ordered Voices	Array<string \| VoiceChangerProVoice \| null> (1–8)	[]	Ordered list of target voices. Voice N recasts the N-th detected speaker (first-appearance order). Speakers without a mapped voice pass through unchanged. Each entry is either a bare voice id (premade name or ElevenLabs UUID), an object with per-voice settings (see below), or null — a keep-slot that keeps that speaker’s original voice while later speakers are still recast. At least one entry must be a real voice. Selectable via VoiceBrowser (premade, custom, or library); add a keep-slot with the Keep original button, or convert any row in place.
Model	"eleven_english_sts_v2" \| "eleven_multilingual_sts_v2"	"eleven_multilingual_sts_v2"	ElevenLabs speech-to-speech model. Multilingual v2 covers 29 languages and is ElevenLabs’ recommended model — including for English source audio, where it often outperforms the English-only model. English v2 remains selectable.
Preserve Background	boolean	true	On mixes the separated music / SFX stem back in under the new voices. Off drops it for clean, voice-only results. (The voice is always split out first regardless of this setting.)
Separation Quality	"fast" \| "best"	"fast"	Quality of the voice/music separation. Fast is quicker and preserves more of the voice. Best gives finer voice/music separation.
Music Volume	"match" \| "normalize" \| "manual" (+ musicVolume %)	"match"	Level of the preserved background music / SFX in the final mix — only applies when Preserve Background is on. match (default) keeps the original level; normalize applies loudness normalization; manual sets the level to musicVolume% (0–200, default 100).
Remove Background Noise	boolean	false	On denoises the result for a cleaner voice-only output. Off leaves the recast as-is.

Per-voice settings (VoiceChangerProVoice)

Each entry in Ordered Voices may be an object that pins per-speaker ElevenLabs speech-to-speech settings and loudness behavior. All fields except voiceId are optional — omit them to use the model defaults. (A null keep-slot has no per-voice settings — there is nothing to configure for a kept voice.)

Field	Type	Range	Default	Description
voiceId	string	—	(required)	Target voice — premade name (Rachel, Aria, …) or an ElevenLabs UUID for a custom clone.
stability	number	0–1	model default	Higher = steadier and more consistent; lower = more expressive and variable.
similarityBoost	number	0–1	model default	How closely the output hugs the target voice’s timbre.
style	number	0–1	0	Style exaggeration. >0 amplifies delivery at the cost of latency / stability.
useSpeakerBoost	boolean	—	false	Sharpens fidelity to the target speaker.
seed	number (int)	0–4294967295	random	Deterministic speech-to-speech seed for this speaker. The same source + settings + seed recast this speaker identically across runs. Omit for a random seed each run.
volumeMode	"match" \| "normalize" \| "manual"	—	"match"	Loudness handling for this recast voice. match matches the original speaker’s loudness; normalize applies loudness normalization; manual uses volume.
volume	number	0–200	100	Manual output volume as a percentage. Consulted only when volumeMode is "manual".

Voice FX (voiceFx)

An optional node-level reverb/echo applied to the combined recast voices before the background is mixed back in — so the effect sits on the voices only, never on the music/SFX bed. Omit voiceFx entirely for no effect.

Field	Type	Range	Default	Description
preset	AudioFxPreset	—	(required)	Effect preset. Reverb spaces: room, bathroom, car, hall, concert-hall, church, cave, arena, outdoor. Character: telephone, megaphone, echo, custom.
wetDryMix	number	0–100	preset default	Reverb wet/dry mix as a percentage — higher = wetter (more reverb). Applies to the reverb presets.
delayMs	number	20–2000	preset default	Echo delay in milliseconds. Used by the echo / custom presets.
decay	number	0–1	preset default	Echo decay / feedback — higher = more repeats. Used by the echo / custom presets.

The reverb presets use wetDryMix; the echo and custom presets use delayMs + decay. Because the effect is applied before the background remix, leaving Preserve Background on keeps a dry music bed under reverberant/echoed voices.

Inputs & Outputs

• Inputs:
  • audio — source audio whose speakers will be recast (audio mode).
  • video — source video to revoice (video mode). When both audio and video are wired, video wins and the audio input is ignored.
• Outputs:
  • audio — the re-voiced audio track (always produced; in video mode this is the new dialogue track).
  • video — the re-voiced video. Disabled until a video input is wired (audio mode produces no video).

Credit Pricing

Voices mapped	Credits
1 speaker	4
2 speakers	8
3 speakers	12
N speakers	4 × N

Credit cost is 4 credits per mapped speaker (per recast pass). Unmapped speakers (those beyond the length of your Ordered Voices list) are passed through without charge.

Keep-slots are free: a null entry reserves and charges nothing — credits count only the recast (non-null) entries.

Note (workflow execution): When running via the workflow orchestrator (server-side), the orchestrator reserves a flat 4 credits at job creation time and the worker commits the actual 4 × mappedCount on completion. For single-speaker workflows there is no under-reserve. For multi-speaker runs the orchestrator may temporarily reserve fewer credits than the worker commits — the final charge is always correct. Single-node runs (clicking Run on the canvas) reserve the correct dynamic amount up front.

Video Mode

Wire any talking video into the video input and the node will:

1. Extract the audio track from the clip.
2. Detect each speaker by first-appearance order.
3. Re-voice each speaker with the corresponding target voice (speech-to-speech).
4. Remux the new voices onto the original video and return it — plus the new audio track on the audio output handle.

Requires an audio track. Most text-to-video / image-to-video models output silent video. If you feed in a silent clip, the node fails fast. Use a clip with spoken audio, or feed audio directly.

Keeping the background. Leave Preserve Background on (default) to keep any music or sound effects baked into the clip’s audio under the new voices. Turn it off for clean, voice-only results.

Best Practices

• Order your voices carefully — the mapping is positional (first-appearance speaker order). If you are unsure of speaker order, run the clip through a transcription node first to inspect the ordering.
• Leave Model on Multilingual v2 (the default) — ElevenLabs recommends it even for English source audio, and it’s required for non-English audio. Switch to English v2 only if you want to compare results.
• Use Preserve Background on (default) to keep background music or SFX in place. Turn it off only when you want a clean, voice-only output.
• If the music bleeds into the recast or the voice sounds thin, switch Separation Quality to Best for a cleaner voice/music split. Leave it on Fast when speed matters or the voice is already coming through clearly.
• Tune per-voice stability / similarityBoost / style individually per speaker — each entry in Ordered Voices takes its own settings, so you can stabilize one speaker while keeping another expressive.
• Use a per-voice volumeMode (match / normalize / manual) to balance loudness across recast speakers — match mirrors the original speaker, manual lets you dial in an exact percentage.
• You can map fewer voices than speakers: only the listed speakers are revoiced; the rest pass through in the original voice.
• Use keep-slots (Keep original) to recast only some speakers — e.g. voices [Rachel, (keep), Aria] recast speakers 1 and 3 while speaker 2 keeps their original voice. Keep-slots don’t cost credits.
• Custom cloned voices (created via the Voice Clone node) work as target voices for personalized per-speaker recast.

Common Use Cases

• Re-dubbing a multi-character dialogue video with different voices in one step
• Replacing all speakers in a podcast or interview recording with anonymized voices
• Casting a scene with specific character voices while preserving the original performance
• Converting rough multi-speaker scratch tracks to polished voiceover
• Building multi-lingual versions of scripted content with matched character voices
• Recasting only selected speakers in a panel or interview while the host keeps their original voice (keep-slots)

Tips

• The emotion and pacing of the original speakers are preserved — this is Speech-to-Speech, not Text-to-Speech. The input performance matters for each speaker.
• If the output sounds robotic on a particular speaker, try lowering that voice’s similarityBoost or stability (each voice is configured independently), or switch to a voice with a closer timbre to the source.
• In video mode, both the revoiced video and the revoiced audio are available as outputs — wire whichever the rest of your workflow needs.
• This node works with any media input — it does not need to come from another Nodaro node. Uploaded clips and externally hosted URLs both work.