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Features · Audio

Voice, music, and sound: one panel.

Narrate a script with a natural voice, score it with generated music, and drop in the sound effects: three kinds of audio generation in one workspace, with a built-in waveform editor for the cleanup. The same workspace also transcribes a recording or a video's soundtrack into text and subtitles. Cloud models run on your own API keys, speech and transcription can run fully offline, and editing runs locally on your machine.

Choose

Three kinds of sound, one picker.

Switch the composer between speech, music, and sound effects. The model picker filters to what supports the active type, and each category keeps its own default, Auto included. ElevenLabs for a warm narrator, Lyria for a score, SFX 1.5 for foley: one API key per platform (Runware, OpenRouter or Replicate) unlocks them all, a key from a vendor like OpenAI, Google or ElevenLabs adds that vendor's own models, and Supertonic TTS speaks offline with no key at all. A fourth type, Transcribe, switches the picker to speech-to-text models like Whisper, GPT-4o Transcribe and Scribe v2.
Speak

A script in, a voiceover out.

Paste the script, pick a model and a voice, and generate. Voices come from each model's own roster, with per-voice controls (speed, stability, similarity) on models that expose them. Hit the play button beside the picker to audition a voice before committing a whole script to it: the first listen costs a fraction of a cent, and every one after that is cached and free. On models that support cloning, hand it a sample and a transcript instead and it reads your script in that voice.The clip below the mockup is a real, unretouched ElevenLabs v3 generation from CSuite. Press play. The prompt in the bar is the exact script it read.
Real output · ElevenLabs v3narration.mp3
0:00 / 0:10
Compose

Describe the mood, get the music.

Instrumentation, tempo, texture: describe it like a brief to a session musician and the model composes it. Lyria 3 takes reference images too, so a mood board can set the tone, and on Music 2.6 and ACE-Step v1.5 a separate Lyrics field keeps your words exactly as written. Royalty questions don't follow you around: it's your generation, made with your key.The 30-second clip below is a real Lyria 3 composition from the exact prompt shown, the same brief every music model in the catalog answers on its detail page.
Real output · Lyria 3ambient.mp3
0:00 / 0:30
Foley

Sound effects on demand.

The door slam, the forest ambience, the projector whir: describe the sound instead of digging through sample libraries, or hand SFX 1.5 a source video and it scores the sound to the picture. Drop the result straight into a video composition or export it for your editor.Below: a real SFX 1.5 generation of the prompt shown: a heavy wooden door in a stone corridor.
Real output · SFX 1.5impact.mp3
0:00 / 0:10
Transcribe

A recording in, a transcript out.

Switch the type to Transcribe, then upload or drop an audio file or a video, and CSuite pulls the soundtrack out of the video for you. The model writes a text file beside the recording, plus an SRT subtitle file when it returns timestamps. The transcript shows under the player, and clicking a timed line jumps playback to that moment. Whisper Base, Small and Large V3 Turbo run on your own machine with no key, and Scribe v2 on your ElevenLabs key can label each speaker.On models that read a hint, such as Whisper and GPT-4o Transcribe, the prompt box takes names and jargon so they come out spelled right.
Enhance

Type the idea, get the whole brief.

For music and effects, press the wand and your own text model turns one line into a full brief: what the track is about first, then genre, instrumentation, tempo, and mood. Lyrics land wherever the model reads them. Speech has no wand, because the text you type is what gets spoken.Music is billed per generation, so the takes you discard are the expensive part.
Edit

Clean it up without leaving the app.

A waveform editor built into the player covers the usual cleanup, with no export to another tool. Every edit renders locally on your machine and saves in place or as a new copy, keeping the file's own format so a trimmed MP3 stays an MP3.

Trim to the take

Cut the silence off both ends of a recording, or pull one clean take out of a long session. Drag the handles on the waveform and everything outside the selection goes.

Fade in, fade out

Give a generated music bed a smooth entrance and exit before it goes under a voiceover. Set the fade lengths and the envelope is applied to the waveform.

Fix the level

A quiet voiceover next to a loud music bed is the most common mix problem there is. Boost or cut the clip's volume until the levels sit right.

Change the speed

Turn a 42-minute lecture recording into a 28-minute listen at 1.5×, or slow a fast take down. The duration updates with the rate.

Convert the format

Hand your editor a lossless WAV or FLAC, or squeeze a session down to MP3 or OGG for sharing. Pick the target and it transcodes straight from the source file, with no lossy round-trip in between.
Compositions

Not just clips, whole episodes.

Compositions are a second creation mode for podcasts, interviews, and narrated stories: write a script, give every speaker their own voice, mix music and sound effects underneath on a multi-track timeline, and export one MP3, M4A, or WAV. The script, cast, and mixer are covered in full on the compositions page.
Workspace

The rest of the booth.

The small things around the generate button: hearing a voice first, knowing the price, getting back to the prompt that worked.

Audition a voicePlay any voice in the roster straight from the picker before you commit a script to it. First listen costs a fraction of a cent, every one after is cached and free, and on Supertonic TTS every preview is free, generated on-device.
Clone a voiceOn models that support it, attach a sample and its transcript and the model reads your script in that voice instead of a preset one.
Write the brief with AIFor music and effects, type the gist and hit the wand: your text model expands it into subject, genre, instrumentation, tempo, and mood, writing the lyrics too on models that sing from the prompt. Speech is left alone, since the text is what gets spoken.
Know what it costs firstThe composer shows the estimated price before you generate (per clip for music, from your live character count for speech), and a status line tracks the run.
Reuse what workedRecent prompts sit as chips above the composer, and every generated clip remembers the model and settings behind it, reloadable in one click.
Files that stay yoursClips are ordinary files in your project folder. Drag recordings in, filter a long list by name, and open or back them up with any tool you like.
Catalog

Available models & providers.

Every audio model in the catalog is here, covering text-to-speech, music, sound effects and speech-to-text. They run in the cloud through Runware, OpenRouter and Replicate, or direct from vendors like OpenAI, Google, ElevenLabs and more, with your own keys, and on-device through the bundled Hugging Face runtime. Each model that generates audio has real sample clips on its detail page.

OpenAICloud · your API key
OpenRouterCloud · your API key
GoogleCloud · your API key
RunwareCloud · your API key
ReplicateCloud · your API key
xAICloud · your API key
ElevenLabsCloud · your API key
MiniMaxCloud · your API key
Fish AudioCloud · your API key
Hugging FaceLocal · your hardware
KlingCloud · your API key
OllamaLocal · your hardware
GPT-4o Mini TTS
Cloud

OpenAI's steerable speech model: ten natural voices you can direct with free-text instructions for tone, accent and pacing.

OpenAI
Gemini 3.8 Flash TTS
Cloud

Google's most expressive Gemini speech model, for long-form narration and two-speaker scenes in 130 languages, with inline vocal cues such as sighs and laughs.

OpenRouter · Google
Gemini 3.8 Flash-Lite TTS
Cloud

A faster, lower-cost Gemini speech model for high-volume narration and voice agents in 101 languages, with the same voices and vocal cues as 3.8 Flash TTS.

OpenRouter · Google
Grok Text-to-Speech
Cloud

xAI's expressive text-to-speech model with multiple voices and 20-language support.

Runware · Replicate · xAI
Lyria 3.5
Cloud

Google's music model for full-length songs with structure, vocals or instrumentals, guided by a text prompt, optional lyrics and reference images.

Google
Lyria 3
Cloud

Enhanced Lyria model with improved musical coherence and audio quality.

OpenRouter · Replicate
Lyria 3 Pro
Cloud

Google's professional-grade music model with enhanced fidelity and musical expression.

OpenRouter · Replicate
v4
Cloud

ElevenLabs' most expressive speech model, with closer voice cloning, audio tags for delivery and more than 90 languages.

OpenRouter · ElevenLabs
v4 Turbo
Cloud

The low-latency tier of ElevenLabs v4, with the same audio tags and more than 90 languages at half the per-character price.

OpenRouter · ElevenLabs
v3
Cloud

ElevenLabs' most expressive voice model with rich emotional and tonal range.

OpenRouter · Replicate · ElevenLabs
v3 Conversational
Cloud

A variant of ElevenLabs' v3 voice model tuned for natural dialogue in conversational agents, in more than 70 languages.

OpenRouter · ElevenLabs
Music
Cloud

ElevenLabs music generation model for creating original AI-composed tracks.

Replicate · ElevenLabs
Music 2.6
Cloud

MiniMax music model for full-arrangement AI compositions with rich instrumentation.

Runware · Replicate
SFX 1.5
Cloud

Mirelo sound effects model for generating custom audio SFX from text prompts.

Runware
Speech 2.8
Cloud

MiniMax's studio-grade speech model with 332 voices, emotion control, voice cloning, and a 50,000-character input limit.

Runware · Replicate · MiniMax
Drama 3
Cloud

Fish Audio's text-to-speech model for directed voice performances: you describe how each line should be delivered in square brackets, add sounds and pauses, and script several speakers in one call.

OpenRouter · Fish Audio
Voice
Cloud

HeyGen's text-to-speech model with preset voices on OpenRouter and Runware; on Runware it can also clone a voice from a recording.

Runware · OpenRouter
Voice Turbo
Cloud

A lower-latency version of HeyGen Voice with the same preset voices on OpenRouter and Runware, and voice cloning on Runware.

Runware · OpenRouter
Voxtral TTS 3
Cloud

Mistral's text-to-speech model with preset voices in eight languages; emotion and pace tags written into the text, such as [emotion=happy] or [pace=slow], direct the delivery. In public preview.

OpenRouter
Fish Audio S2.1 Pro
Cloud

Fish Audio's recommended production TTS with natural-language cues in brackets, multi-speaker synthesis in one call, and zero-shot voice cloning across 83 languages.

Runware · OpenRouter · Fish Audio
S2.1 Pro Free
Cloud

Fish Audio's S2.1 Pro model at $0 for development and testing under fair-use limits, with the same bracket cues, multi-speaker synthesis and voice cloning but no latency or data-processing guarantees.

Fish Audio
S2 Pro
Cloud

Fish Audio's previous-generation open S2 TTS with natural-language cues in brackets, multi-speaker dialogue and zero-shot voice cloning across 80+ languages.

OpenRouter · Fish Audio
Seed Audio 1.0
Cloud

ByteDance's audio generation model that reads a script word for word or builds a whole scene from one prompt, with a described voice, ambience, music and sound effects, and clones a voice from short reference clips.

Runware · OpenRouter
MAI-Voice-2.1
Cloud

Microsoft AI's highest-fidelity text-to-speech model, with detailed prosody and a consistent speaker over long passages. It reads in 23 languages through preset voices across 28 locales, and the voice you pick sets the language.

OpenRouter
MAI-Voice-2.1 Flash
Cloud

Microsoft AI's low-latency text-to-speech model, built for real-time responsiveness. It reads in 23 languages through the same preset voices as MAI-Voice-2.1, across 28 locales, and the voice you pick sets the language.

OpenRouter
ACE-Step v1.5
Cloud

Open full-track music generation with lyric editing, remix, cover generation, and voice cloning in 50+ languages.

Runware
GPT Audio
Cloud

OpenAI's generally available speech model: a chat model that reads text aloud in 13 natural-sounding voices, with consistent voice identity across long passages.

OpenRouter
GPT Audio Mini
Cloud

The cost-efficient tier of OpenAI's speech model, reading text aloud in the same 13 voices at a fraction of the price.

OpenRouter
Flash v2.5
Cloud

ElevenLabs' fastest speech model, with about 75 ms latency across 32 languages at half the per-character price of Multilingual v2.

OpenRouter · Replicate · ElevenLabs
Multilingual v2
Cloud

ElevenLabs' previous-generation voice model for lifelike, consistent long-form narration such as voice-overs and audiobooks, in 29 languages.

OpenRouter · ElevenLabs
Flash v2
Cloud

ElevenLabs' English-only speech model with very low latency, suited to conversational and real-time use.

OpenRouter · ElevenLabs
Sound Effects v2
Cloud

ElevenLabs' text-to-sound-effects model: foley, ambiences and impacts up to 30 seconds, with seamless looping for background beds.

ElevenLabs
Whisper
Cloud

OpenAI's hosted Whisper model, which transcribes speech in dozens of languages and returns timed segments for subtitles.

OpenRouter · OpenAI
GPT-4o Transcribe
Cloud

OpenAI's most accurate hosted transcription model, which follows a hint for names and terms and returns plain text without timestamps.

OpenRouter · OpenAI
GPT-4o Mini Transcribe
Cloud

A lower-cost version of GPT-4o Transcribe for high-volume work that returns plain text without timestamps.

OpenRouter · OpenAI
GPT Transcribe
Cloud

OpenAI's high-accuracy transcription model for recorded audio, which follows a hint for names and terms and returns plain text without timestamps.

OpenRouter · OpenAI
Whisper Large V3
Cloud

OpenAI's open-weight Whisper Large V3, which transcribes speech in close to a hundred languages and returns timed segments for subtitles.

OpenRouter · Replicate
Whisper Large V3 Turbo
CloudLocal

A faster, slimmed-down Whisper Large V3 that keeps most of its accuracy and returns timed segments for subtitles.

OpenRouter · Hugging Face
Fish Audio Transcribe 1
Cloud

Fish Audio's speech-to-text model, which detects the spoken language automatically; timestamps come back on the direct route.

OpenRouter · Fish Audio
Transcribe 1 Pro
Cloud

Fish Audio's speech-to-text model for multi-speaker conversations, which labels who is speaking and keeps emotion and vocal-event cues such as laughter in the transcript.

OpenRouter · Fish Audio
Muse Voice Transcribe 1.0
Cloud

Meta's speech-to-text model for push-to-talk and speaker-aware transcription, which returns plain text.

OpenRouter
MAI-Transcribe 2
Cloud

Microsoft AI's multilingual transcription model, which covers 60 languages with automatic language detection and returns plain text.

OpenRouter
Voxtral Small Transcribe 3
Cloud

Mistral's flagship transcription model, which returns a timestamped transcript and detects the language on its own. In public preview.

OpenRouter
Voxtral Mini Transcribe 3
Cloud

Mistral's compact transcription model, a lower-cost sibling of Voxtral Small Transcribe 3 with timestamps and language detection. In public preview.

OpenRouter
Universal-3.6 Pro
Cloud

AssemblyAI's speech-to-text model and the successor to Universal-3.5 Pro, served through its synchronous API for clips of up to two minutes. The app sends a longer recording in two-minute pieces and returns plain text.

OpenRouter
Gemini 3.5 Transcribe
Cloud

Google's speech-to-text model for fast synchronous transcription with automatic language detection; this route returns plain text.

OpenRouter
Scribe v2
Cloud

ElevenLabs' batch transcription model, which returns word-level timing for subtitles and can label who is speaking.

OpenRouter · ElevenLabs
Scribe v2 Medical
Cloud

ElevenLabs' batch transcription model tuned for clinical and medical terminology, which returns word-level timing for subtitles and can label who is speaking.

OpenRouter · ElevenLabs
Kling Text to Audio
Cloud

Kuaishou's Kling sound effects model, generating 3 to 10 second clips from a short text description.

Kling
Kling TTS
Cloud

Kuaishou's Kling text-to-speech model, reading up to 1,000 characters aloud in English or Chinese system voices.

Kling
Phonon
Local

Gradium's 31M-parameter English text-to-speech model, run on device by Ollama on Apple silicon Macs. It reads text as written, so numbers and dates are best spelled out.

Ollama
Supertonic TTS
Local

On-device English text-to-speech that runs entirely in the app, with ten preset voices and no API key.

Hugging Face
Whisper Base
Local

A small on-device Whisper model that transcribes speech in the app with no API key, trading accuracy for speed.

Hugging Face
Whisper Small
Local

A mid-sized on-device Whisper model that transcribes speech in the app with no API key, balancing speed and accuracy.

Hugging Face
FAQ

Audio questions, answered.

How speech, music, sound effects, and transcription work in CSuite: voices, costs, editing, and formats.

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