🎙️ The Free Audio Generation Guide (2026)

Music · voice (TTS + cloning) · transcription — the $0 stack for a solo creator who monetizes, with a hard focus on the thing every other list glosses over: commercial licensing.

Verified June 2026. Numbers and licenses change fast. Claims are marked ✅ verified (read from a primary source — pricing page, license file, or model card) or ⚠️ verify (page was JS/login-gated or the free-plan detail wasn't exposed). Researched with a multi-model sweep (GPT-5.5, Gemini 3.1 Pro, Claude Opus 4.8) and reconciled against official sources.

This is a companion to the main Awesome Free Compute list and the Free Token-Maxxing Guide (LLMs/tokens). This file is the audio half: anything you'd need to score, narrate, and caption a video for $0. Once you've generated the audio, the Media Post-Production Guide 🎬 covers finishing it — stem separation, mastering, loudness, dubbing.

Contents

• TL;DR
• The licensing landmines
• 1. Music generation
• 2. Text-to-speech and voice cloning
• 3. Transcription and subtitles
• 4. Free GPU to run it all
• 5. The $0 creator pipeline
• Sources

TL;DR

The $0 audio stack for a creator who needs commercial rights:

One-liner: Song → ACE-Step (or Firefly for an instrumental bed). Voice → Azure F0 / Kokoro, clone your own voice with GPT-SoVITS. Captions & lyric timing → WhisperX. Hinglish → Azure LID or Deepgram Nova-3. All $0, all commercial-clean.

The licensing landmines

For a monetized channel, "free to use" almost never means "free to monetize." These are the traps that look free but are not commercially usable on their free/open terms:

Green-light — free and commercial: ACE-Step (Apache-2.0), YuE (Apache-2.0), Stable Audio Open / Open Small (under $1M revenue), Adobe Firefly Generate Soundtrack, Azure Speech F0, Google Cloud TTS, Kokoro / Piper / F5-TTS / GPT-SoVITS / CosyVoice (MIT/Apache), and the whole Whisper family (MIT) + AI4Bharat IndicConformer (MIT).

1. Music generation

1.1 Open weights — self-host = truly free + commercial

The cleanest commercial path. Run them on a free Colab T4, Kaggle, HF ZeroGPU, or a beefy local GPU (see §4).

Pick: ACE-Step is the standout — Apache-2.0, generates a full song with vocals from lyrics + a style prompt, duration control, lyric editing/remix, and a memory-optimized path down to ~8 GB. Ready-made free Space: huggingface.co/spaces/ACE-Step/ACE-Step. Use your own lyrics, keep the project files, and run a similarity check before publishing.

1.2 Hosted apps with free tiers

1.3 Chinese music apps — caveat

Mureka (Kunlun SkyMusic), Tiangong SkyMusic, Haimian Music (ByteDance), Tencent Lingyin/TME, NetEase Tianyin, ACE Studio. Marketing often claims "full commercial rights," but the free-plan ToS were JS/PDF/login-gated and could not be verified this pass, and several need a +86 phone number. For a monetizing creator, prefer the open ACE-Step model — its Apache-2.0 license is unambiguous, versus trusting an in-app license you can only read at generation time.

Verdict (music): ① ACE-Step (open, Apache-2.0, vocals, free GPU) → ② YuE if you need richer vocal songs and can find a 24 GB+ free GPU → ③ Adobe Firefly Generate Soundtrack for a quick commercial-safe instrumental bed. Avoid for monetized YouTube: Suno free, Soundful/Loudly free, MusicGen.

2. Text-to-speech and voice cloning

2.1 Hosted free tiers

2.2 Open weights — free + commercial

Run on a free Colab T4, HF ZeroGPU, or locally on an Apple Silicon Mac (many run on CPU).

2.3 Hindi/Hinglish + cloning legality

• Best Hindi/Hinglish narration: hosted Azure F0 or Google Cloud TTS — they handle code-switched, transliterated text far better than most open models.
• Best $0 local: Kokoro (narration) and GPT-SoVITS (clone your own voice once, then unlimited Hindi/Hinglish output, MIT, monetizable).
• Cloning legality: open models won't stop you cloning anyone — but monetizing someone else's voice violates rights of publicity/likeness. Only clone your own voice (or one you have written permission for). YouTube also requires disclosure of realistic AI-generated content.

Verdict (voice): narration → Azure F0 / Google TTS (hosted) or Kokoro (local); cloning → GPT-SoVITS (best, MIT) or F5-TTS / CosyVoice for short-sample zero-shot. Avoid XTTS-v2 and Fish Speech for monetized work.

3. Transcription and subtitles

3.1 Open weights — self-host on free GPU/Mac

Key finding: the models at the top of the English ASR leaderboard — NVIDIA Parakeet/Canary, IBM Granite, Cohere — do not support Hindi. For Hinglish, Whisper large-v3 (via faster-whisper/WhisperX) is the best free open engine.

3.2 Hosted free tiers / credits

3.3 Hindi / Hinglish — the hard case

Casual Hindi-English code-switch is the toughest case (plain local Whisper struggles). Ranked free options:

1. Azure continuous LID [hi-IN,en-IN] — verified-good, per-segment language switching, ~5 free hrs/mo. (Your existing baseline.)
2. Deepgram Nova-3 multi — the only hosted free-credit option that explicitly documents Hindi plus code-switching ($200 credit).
3. Self-host Whisper large-v3 (faster-whisper/WhisperX) for unlimited free Hinglish; AI4Bharat IndicConformer or IIT-Madras whisper-hindi for clean Devanagari Hindi (these are weaker on English mixing).

3.4 Subtitles & karaoke timing

WhisperX is the best free tool: word-level forced alignment + speaker diarization + subtitle export, on Colab or Mac. For Hindi songs, pair it with a Hindi wav2vec2 alignment model. Mac-local alternatives with word timings: faster-whisper (word_timestamps=True), MLX-Whisper, whisper.cpp.

Verdict (STT): general → self-host Whisper large-v3 (or Groq for zero setup); Hindi/Hinglish → Azure LID / Deepgram Nova-3; karaoke timing → WhisperX.

4. Free GPU to run it all

The open music/voice/STT models above are commercial-clean only if you self-host — and you can do that for $0:

• HF Spaces / ZeroGPU — using existing ZeroGPU Spaces (ACE-Step, MusicGen, Whisper demos) is free; authenticated free accounts get ~5 min GPU/day on a 48 GB Blackwell slice (PRO = 40 min). Great for one-off generations.
• Google Colab (free) — ~16 GB T4. Comfortable for ACE-Step (offload), Stable Audio Open Small, MusicGen-small, and faster-whisper/WhisperX large-v3.
• Kaggle Notebooks (free) — weekly GPU quota (T4×2 / P100); best for batch transcription or longer renders. Verify the current quota in your account.
• Mac-local (Apple Silicon) — fully offline, unlimited minutes, private: whisper.cpp / MLX-Whisper / faster-whisper (STT) and Kokoro / Piper (TTS) all run well on an M-series CPU/GPU.

For more on these venues (and serverless GPU like Modal), see the main Awesome Free Compute list.

5. The $0 creator pipeline

End-to-end for a music-video creator, every step commercial-clean and free:

1. Song — ACE-Step (Apache-2.0) on a free GPU for a full track with vocals from your own lyrics; or Adobe Firefly Generate Soundtrack for a quick instrumental bed.
2. Narration / VO — Azure Speech F0 Hindi/Indian-English voices (0.5M chars/mo), or Kokoro locally for unlimited.
3. Your signature voice — clone your own voice once with GPT-SoVITS (MIT), then reuse it forever for hooks/VO.
4. Lyric timing / karaoke captions — WhisperX word-level timestamps on the vocal stem.
5. Hinglish transcription / subtitles — Azure continuous LID [hi-IN,en-IN] (your baseline) or Deepgram Nova-3 multi ($200 credit).

Total cost: $0. Total commercial exposure: none, as long as you stick to the green-light tools in the licensing landmines.

Sources

Primary sources fetched/verified June 2026 (representative):

• Music — open weights: github.com/ace-step/ACE-Step + huggingface.co/ACE-Step/ACE-Step-v1-3.5B (Apache-2.0); github.com/multimodal-art-projection/YuE (Apache-2.0); huggingface.co/stabilityai/stable-audio-open-1.0 + /stable-audio-open-small + stability.ai/license; huggingface.co/facebook/musicgen-small (CC-BY-NC).
• Music — hosted: adobe.com/products/firefly/features/ai-music-generator.html (2 lifetime, commercial); help.suno.com/en/articles/2746945 + suno.com/terms (free = non-commercial); soundful.com/pricing + /license; loudly.com/license-agreement.
• TTS — hosted: azure.microsoft.com/pricing/details/speech (F0 0.5M chars/mo); cloud.google.com/text-to-speech/pricing (1M chars/mo); elevenlabs.io/pricing (free non-commercial); aws.amazon.com/polly/pricing.
• TTS — open weights: huggingface.co/hexgrad/Kokoro-82M (Apache-2.0); github.com/SWivid/F5-TTS (MIT); github.com/RVC-Boss/GPT-SoVITS (MIT); github.com/FunAudioLLM/CosyVoice (Apache-2.0); coqui/XTTS-v2 (CPML, non-commercial); github.com/fishaudio/fish-speech (research license); Piper / MeloTTS / Bark (MIT).
• STT — open weights: github.com/openai/whisper (MIT); github.com/SYSTRAN/faster-whisper; github.com/m-bain/whisperX; github.com/ggml-org/whisper.cpp; huggingface.co/nvidia/parakeet-tdt-0.6b-v2 + /canary-1b-flash (CC-BY-4.0, no Hindi); huggingface.co/ai4bharat/indic-conformer-600m-multilingual (MIT); huggingface.co/spaces/hf-audio/open_asr_leaderboard.
• STT — hosted: console.groq.com/docs/speech-to-text; deepgram.com/pricing + developers.deepgram.com (Nova-3 multi Hindi); assemblyai.com/pricing; learn.microsoft.com/azure/ai-services/speech-service/language-identification (continuous LID); cloud.google.com/speech-to-text/pricing; elevenlabs.io/pricing/api (Scribe).
• Free GPU: huggingface.co/docs/hub/spaces-zerogpu; research.google.com/colaboratory/faq.html; kaggle.com/docs/notebooks.

Quotas/licenses are point-in-time (June 2026) and change frequently — verify the free-plan terms at signup/download before relying on them, especially for commercial use. Corrections via PR welcome.

📝 Spotted a stale quota or a license that changed? This guide is open source — edit it on GitHub.