Stable Audio 2 5

Prerequisites

Install and load these skills before generating (skip if already in context via @pruna):

| Skill | Description | Install | | --- | --- | --- | | generation-diversity | Use when writing any generative prompt — ritual seed, explicit structure, scenario axes, and quality gates before paid API calls. | npx skills add PrunaAI/pruna-skills@generation-diversity -y | | audio-prompting | Use when crafting TTS, music, or bed prompts for any generative audio model — director style, song structure, and post-production layering. | npx skills add PrunaAI/pruna-skills@audio-prompting -y | | pruna-api | Use before any Pruna or Replicate HTTP call — credentials, upload/poll/download, parallel batches, and agent safety. | npx skills add PrunaAI/pruna-skills@pruna-api -y |

Or install the full suite once: npx skills add PrunaAI/pruna-skills@pruna -y

Follow each skill's Before generating / craft sections — do not restate guide content here.

Agent habit

In the first reply, name ` stable-audio-2.5 in backticks, confirm REPLICATEAPITOKEN (or stop with signup links from pruna-api`), then ask for required inputs. Redirect when When NOT to use fits better.

When NOT to use

Use a different skill instead:

| Skill | Description | Install | | --- | --- | --- | | music-2.5 | Use when someone wants an original AI song with vocals — sung lyrics, a style prompt track, or source audio for a music video. | npx skills add PrunaAI/pruna-skills@music-2.5 -y | | gemini-3.1-flash-tts | Use when someone needs spoken narration or voiceover — explainer tracks, documentary lines, or voice to pair with generated video. | npx skills add PrunaAI/pruna-skills@gemini-3.1-flash-tts -y |

Environment

export REPLICATE_API_TOKEN=r8_...

Requires ffmpeg and ffprobe on PATH for the mix step.

HTTP (curl)

curl -s -X POST \
  -H "Authorization: Bearer ${REPLICATE_API_TOKEN}" \
  -H "Content-Type: application/json" \
  -d '{
    "input": {
      "prompt": "Instrumental light electronic pop bed, soft groove and mellow synth pads, calm positive tech atmosphere, understated background music, no vocals, 94 BPM",
      "duration": 90,
      "steps": 8,
      "cfg_scale": 1
    }
  }' \
  "https://api.replicate.com/v1/models/stability-ai/stable-audio-2.5/predictions"

Poll urls.get until status is succeeded; download output MP3.

Before generating

1. Complete Prerequisites guide reading order — bed prompt craft: audio-prompting Worked examples (instrumental bed).
2. Confirm prompt, duration (match or slightly exceed reel length), and mix volume (~0.08–0.15 under VO). When listing fields, name REPLICATE_API_TOKEN (Replicate — not PRUNA_API_KEY).
3. Model notes: lead with Instrumental and no vocals. Duration 1–190s. Prefer understated beds (BPM ~88–98 for tech launch reels) so music does not compete with dialogue.

Required input

• prompt (string)

Common optional fields

• duration — seconds, 1–190
• steps — 4–8 (default 8)
• cfg_scale — 1–25 (default 1)
• seed — optional integer

Typical next steps

Common follow-ons after this skill:

| Skill | Description | Install | | --- | --- | --- | | gemini-3.1-flash-tts | Use when someone needs spoken narration or voiceover — explainer tracks, documentary lines, or voice to pair with generated video. | npx skills add PrunaAI/pruna-skills@gemini-3.1-flash-tts -y | | visual-transition-reel | Use when someone wants a montage with transitions between shots — action-sequence reel or multi-scene piece where narration is optional. | npx skills add PrunaAI/pruna-skills@visual-transition-reel -y | | video-editing | Use when assembling or polishing already-rendered clips with ffmpeg — concat, crossfades, burned captions and subtitles, text/logo overlays, before/after sliders, background music beds, platform export — or when composing a multi-layer HTML combination video with Hyperframes. Not for AI video generation, prompt craft, or model-based video edits. | npx skills add PrunaAI/pruna-skills@video-editing -y |

Source & license

This open-source skill is cataloged on AgentStack and links to its original source — we do not rehost the code.

• Author: PrunaAI
• Source: PrunaAI/pruna-skills
• License: Apache-2.0
• Homepage: https://dashboard.pruna.ai

Install and usage instructions live in the source repository linked above.