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audio-generation

audio-generation

github.com/massgenCreative & media1.1k76 installsUpdated 20w ago
Repository

About audio-generation

audio-generation is a skill guide for creating speech, music, sound effects, and other audio with generate_media. It describes ElevenLabs and OpenAI options, with OpenAI fallback for failed ElevenLabs speech generation.

Key features

  1. 01Generate text-to-speech audio
  2. 02Create music and sound effects
  3. 03Convert, isolate, clone, or design voices
  4. 04Dub audio into another language
  5. 05Select backend, voice, and output format

Use cases

  1. 01Create narration for a presentation
  2. 02Generate music or sound effects from text
  3. 03Prepare translated audio dubbing
  4. 04Transform or clean up existing voice audio

Install

Copy the command and run it in a terminal.

$npx skills add https://github.com/massgen/massgen --skill audio-generation

After installing, type/audio-generationin Claude Code to confirm it loaded.

Bundled files

References and scripts installed along with SKILL.md.

references/
advanced.md
music_and_sfx.md
voices.md

Details

From the project README

Audio Generation

Generate audio using generate_media with mode="audio". Supports speech (TTS), music, and sound effects. ElevenLabs is preferred when available, with OpenAI as fallback.

Quick Start

# Text-to-speech (auto-selects ElevenLabs if key available)
generate_media(prompt="Hello, welcome to our presentation!", mode="audio")

# With specific voice
generate_media(prompt="Hello!", mode="audio", voice="Rachel")

# Music generation (ElevenLabs only)
generate_media(prompt="Upbeat jazz piano with soft drums", mode="audio",
               audio_type="music", duration=30)

# Sound effects (ElevenLabs only)
generate_media(prompt="Thunder rolling across a mountain valley", mode="audio",
               audio_type="sound_effect", duration=5)

Audio Types

TypeBackendsDescription
"speech" (default)ElevenLabs, OpenAIText-to-speech with voice selection
"music"ElevenLabs onlyMusic generation from text prompt
"sound_effect"ElevenLabs onlySound effect generation
"voice_conversion"ElevenLabs onlyChange voice of existing audio (speech-to-speech)
"audio_isolation"ElevenLabs onlyRemove background noise, isolate vocals
"voice_design"ElevenLabs onlyCreate a new synthetic voice from text description
"voice_clone"ElevenLabs onlyClone a voice from audio samples
"dubbing"ElevenLabs onlyTranslate and dub audio to another language

Backend Comparison

BackendDefault ModelSupportsAPI Key
ElevenLabs (priority 1)eleven_multilingual_v2Speech, music, SFXELEVENLABS_API_KEY
OpenAI (priority 2)gpt-4o-mini-ttsSpeech onlyOPENAI_API_KEY

If ElevenLabs TTS fails, the system automatically falls back to OpenAI TTS.

Key Parameters

ParameterDescriptionExample
promptText to speak (speech) or description (music/SFX)"Hello world!"
voiceVoice name or ID"Rachel", "nova", "alloy"
audio_typeType of audio"speech", "music", "sound_effect"
durationLength in seconds (music/SFX only)30
instructionsSpeaking style (OpenAI gpt-4o-mini-tts only)"warm, reflective tone"
audio_formatOutput format"mp3", "wav", "opus"

Voice Quick Reference

ElevenLabs (top voices):

VoiceCharacter
RachelWarm, conversational female
SarahClear, professional female
JoshFriendly male
AdamDeep, authoritative male
EmilyBright, energetic female

OpenAI voices: alloy, echo, fable, onyx, nova, shimmer, coral, sage

Important: prompt vs instructions

For speech, prompt is the literal text to speak. Style guidance goes in instructions:

# CORRECT: prompt = text to speak, instructions = how to speak it
generate_media(
    prompt="Welcome to the annual report presentation.",
    mode="audio",
    voice="alloy",
    instructions="warm, reflective tone with measured pacing",
    backend_type="openai"
)

# WRONG: Don't put style instructions in prompt
generate_media(prompt="Say this warmly: Welcome...", mode="audio")  # Bad!

instructions only works with OpenAI gpt-4o-mini-tts. ElevenLabs uses voice selection for tone.

Audio Understanding

Use read_media (not generate_media) to analyze existing audio:

read_media(path="recording.mp3", prompt="Transcribe and summarize this audio")

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