Speech
Speech synthesis, recognition, translation, speaker verification and music/audio AI demos.
Audio Classification
Classify the same clip with two engines: audio events (YAMNet) and speech emotion (wav2vec2).
Audio Compressor
Lower the bitrate, drop the sample rate and mix to mono — with a live size estimate and the source bitrate for reference.
Audio Format Converter
Convert between MP3 / WAV / OGG / M4A / FLAC, adjust the bitrate, and compare the file size before and after.
Audio Recorder
Record from the microphone with a live input level meter; play back, download, and convert to MP3 / WAV / OGG / M4A / FLAC in the browser.
Audio Trimmer
Drag out the span to keep on the waveform and export just that part; the output format follows the source by default.
Audio Visualizer
Visualize audio with waveform and spectrogram.
Extract Audio from Video
Pull the audio track out of an MP4 / MOV / WebM video and save it as MP3 / WAV / OGG / M4A / FLAC.
Hum to Notes
Hum a tune; it is transcribed into do-re-mi notes that you can play back.
Kokoro Engine
Local neural TTS (82M, ONNX q8, WebGPU/WASM) with multilingual voices.
Metronome & Tap
Hear ticks at a set BPM, or tap along to measure your own BPM and alignment.
Mini Synth
A web piano that plays triangle-wave notes with an envelope; volume adjustable.
Multi-speaker Audiobook
Paste a script of “Character: line”, each character gets its own voice, then export the whole thing as one WAV.
Real-time Pitch Detector
Real-time pitch and note detection from mic (YIN).
Speech Rate Meter
Count characters and characters-per-minute live while you speak.
Speech Recognition (ASR)
Transcribe with two engines: the browser built-in Web Speech API and a local Whisper model.
Speech Translator (zh ↔ en)
Speak Chinese: it transcribes, translates into English and speaks it back — fully offline.
Text to Speech (TTS)
Synthesize the same text with two engines: local Kokoro and server-side Edge TTS.
Voice Changer
Add real-time effects to your voice: robot, monster, echo, chipmunk — all in-browser WebAudio.
Voice Cloning (Chatterbox)
Clone any voice from a short reference clip and speak your text (0-shot; downloads a large model).
Voice Command Console
Speak commands (left/right/up/down/jump/dance/color) to move a little ghost around.
Voiceprint (Speaker Verification)
Enroll a voiceprint, then match a new clip against everyone — with a full similarity ranking.
Whisper Engine
OpenAI Whisper running locally: transcription and translation tasks.
YAMNet Engine
MediaPipe YAMNet: 521-class AudioSet event classification (file or live mic).