Niconico Voice Changer & Soundboard

Transform your voice on Niconico Live and trigger custom sounds for scrolling comments, VTuber moments, gaming streams, and creator bits.

Download Echo

AI Voice Conversion and Stream Sounds for Niconico

Echo is a free Niconico voice changer and soundboard for ニコニコ生放送 creators. Use AI voice conversion for VTuber personas, anonymous streams, gaming broadcasts, roleplay segments, or creative voice bits, then trigger short custom sounds for scrolling comment reactions, scene changes, community jokes, and stream stingers. Niconico is known for comment-heavy streams, otaku culture, gaming, music creators, and creator communities where voice identity can be part of the show. Echo works as a standard audio input device through OBS, N Air, or other broadcasting software connected to your Niconico account, and processing runs locally on your PC.

Quick Start

How to use with Niconico

Step 1

Download & Install

Download Echo Live from the download page. Under 60 seconds to install. No Niconico extension or premium subscription required.

Step 2

Configure in OBS or N Air

Niconico streamers typically use OBS Studio or N Air. Add an Audio Input Capture source and select "Echo" as the device. Mute your original microphone source to send only the AI-converted voice to your broadcast.

Step 3

Stream with a New Voice

Select a voice model, assign any soundboard hotkeys, and click Start. Begin your Niconico Live broadcast with a transformed voice and quick custom sounds ready for comment-heavy moments.

Features

Why Niconico Streamers Choose Echo

VTuber Voice Identity

Niconico's VTuber community demands consistent, natural-sounding voice personas. Echo's AI voice conversion sustains character immersion for entire streams — not pitch-shifted robot voices that break the kayfabe.

Creator Voice Experiments

Niconico's music and creator culture values voice identity. Echo can help with anonymous talking segments, character intros, cover-stream commentary, and playful vocal experiments while keeping a natural fallback voice ready.

Comment Reaction Sounds

Trigger short stingers, applause, fail sounds, character cues, or community jokes when comments start moving fast. Use properly licensed clips or your own sounds for public streams.

Stream Sync Friendly

Built for live streaming workflows. Add Echo through OBS or N Air, test voice plus soundboard in a short recording, and adjust offsets only if your setup needs them.

Voice Models

Voice Models for Niconico Streaming

Echo supports any .pth voice model from the RVC community. Japan's AI voice community is one of the most active in the world, driven by VTuber culture, Vocaloid fandom, anime voice acting, and creator experimentation. Browse community models for VTuber personas, anime-style voices, natural anonymous streams, or roleplay formats. Then give that persona a small soundboard: comment reactions, stream stingers, intro cues, fail sounds, and recurring community jokes that fit the tone of your Niconico channel.

12+

Characters

Anime · Game · Film

Natural

Male · Female · Neutral

Effects

Robot · Demon · Radio

∞

Custom

Train your own .pth

Technology

How AI Voice Technology Works for Niconico

Traditional voice changers use pitch shifting — frequency manipulation that can sound obviously artificial. Echo uses RVC voice conversion, an AI voice changer technology based on deep neural networks. The AI preserves much of your timing, emotion, and emphasis while reconstructing the voice identity. For Niconico streamers, this supports character personas, anonymous identities, and creative vocal experiments without relying only on a simple pitch effect. EchoDeck adds the live-production layer: custom sounds you can trigger for comment reactions, scene changes, and community jokes before the final audio reaches your broadcasting software.

Learn more about RVC ›

Niconico Voice Changer and Soundboard Ideas

Use Echo for VTuber personas, utaite-style talking segments, gaming streams, anonymous broadcasts, roleplay formats, or short comment-reaction bits. Keep a reliable natural voice available for longer conversations, use character voices when the stream format calls for them, and build a small soundboard of custom stingers for recurring jokes and comment-heavy moments.

Build a Full Niconico Stream Setup

Add a Soundboard

Trigger comment reactions, stream stingers, community jokes, or short custom sounds during fast-moving live moments.

Shape a Custom Effect

Use the Audio Lab for lighter voice color, radio texture, or polished mic tone before OBS or N Air receives your audio.

Use AI Voice Models

Import or train a voice model for a recurring Niconico persona, VTuber voice, or anonymous stream identity.

Make Comment-Reaction Sounds Feel Native

Niconico streams are shaped by comments as much as the streamer, so soundboard timing matters. Use short sounds for comment waves, game fails, character entrances, applause, and recurring community jokes. Keep the AI voice stable for the main persona, especially on VTuber or talk streams, and let the soundboard handle quick punchlines. If you use music or cover-stream segments, test the full mix carefully and avoid sounds that clash with the performance. The goal is a channel identity people recognize, not a wall of random noise.

Pro Tip

Keep Niconico Voice Streams Watchable

Record a short test with comments, music, avatar or camera, soundboard clips, and voice together. If you sing or perform, test the voice carefully before going live and keep a natural fallback available. If the stream is conversation-heavy, choose a voice model that keeps words clear over background music.

Also works with

See all compatible apps ›

FAQ

Niconico Voice Changer FAQ

Is Echo free for Niconico?

Yes, free to use with no restrictions. No Niconico Premium subscription required, no credit card, no trial limits. All voice models and DSP effects are included.

Does it work with N Air?

Yes. Echo appears as a standard microphone device. In N Air's audio settings, select "Echo" as your input. It also works with OBS Studio and any other streaming software.

Can I use it for utaite singing streams?

You can experiment with Echo for singing or cover-stream segments, but always test first. AI voice conversion depends on the model, your mic, your performance, and your hardware. Keep a natural voice fallback ready for serious performances.

Can I use a soundboard on Niconico?

Yes. Echo includes EchoDeck for custom stingers, comment reactions, character cues, and stream-safe meme sounds. Use your own clips or properly licensed sounds, then test volume with music and voice before going live.

Is it good for VTuber streaming?

Yes. Echo provides consistent, natural-sounding voice conversion that sustains character immersion across entire broadcasts. Combined with VTuber avatar software, it creates a complete persona experience.

Does it cause audio delay?

Echo is built for live streaming, but full stream sync depends on your camera, capture setup, streaming software, and hardware. Test a short recording first, then adjust offsets only if your setup needs them.

Ready to change your voice in Niconico?

Download Echo and start using it with Niconico in under 60 seconds. Completely free.