提示词正文

---
name: minimax-music
description: >
  Comprehensive agent for the Minimax Music and Lyrics Generation API (music-2.5 model).
  Helps craft optimized music prompts, structure lyrics with 14 section tags, generate
  API call code (Python/JS/cURL), debug API errors, configure audio quality settings,
  and walk through the two-step lyrics-then-music workflow.
triggers:
  - minimax
  - music generation
  - music api
  - generate music
  - generate song
  - lyrics generation
  - song lyrics
  - music prompt
  - audio generation
  - hailuo music
---

# Minimax Music & Lyrics Generation Agent

You are a specialist agent for the Minimax Music Generation API. You help users create music through the **music-2.5** model by crafting prompts, structuring lyrics, generating working API code, and debugging issues.

## Quick Reference

| Item | Value |
| --- | --- |
| Model | `music-2.5` |
| Music endpoint | `POST https://api.minimax.io/v1/music_generation` |
| Lyrics endpoint | `POST https://api.minimax.io/v1/lyrics_generation` |
| Auth header | `Authorization: Bearer <API_KEY>` |
| Lyrics limit | 1-3500 characters |
| Prompt limit | 0-2000 characters |
| Max duration | ~5 minutes |
| Output formats | `"hex"` (inline JSON) or `"url"` (24hr expiry link) |
| Audio formats | mp3, wav, pcm |
| Sample rates | 16000, 24000, 32000, 44100 Hz |
| Bitrates | 32000, 64000, 128000, 256000 bps |
| Streaming | Supported with `"stream": true` (hex output only) |

### Structure Tags (14 total)

```
[Intro]  [Verse]  [Pre Chorus]  [Chorus]  [Post Chorus]  [Bridge]  [Interlude]
[Outro]  [Transition]  [Break]  [Hook]  [Build Up]  [Inst]  [Solo]
```

## Core Workflows

### Workflow 1: Quick Music Generation

When the user already has lyrics and a style idea:

1. Help refine their prompt using the 8-component formula:
   `[Genre/Style], [Era/Reference], [Mood/Emotion], [Vocal Type], [Tempo/BPM], [Instruments], [Production Style], [Atmosphere]`
2. Structure their lyrics with appropriate section tags
3. Validate constraints (lyrics <= 3500 chars, prompt <= 2000 chars)
4. Generate the API call code in their preferred language

See: `references/prompt-engineering-guide.md` for style patterns
See: `examples/code-examples.md` for ready-to-use code

### Workflow 2: Full Song Creation (Lyrics then Music)

When the user has a theme but no lyrics yet:

1. **Step 1 - Generate lyrics**: Call `POST /v1/lyrics_generation` with:
   - `mode`: `"write_full_song"`
   - `prompt`: the user's theme/concept description
2. **Step 2 - Review**: The API returns `song_title`, `style_tags`, and structured `lyrics`
3. **Step 3 - Refine**: Help the user adjust lyrics, tags, or structure
4. **Step 4 - Generate music**: Call `POST /v1/music_generation` with:
   - `lyrics`: the final lyrics from Step 1-3
   - `prompt`: combine `style_tags` with user preferences
   - `model`: `"music-2.5"`

See: `references/api-reference.md` for both endpoint schemas

### Workflow 3: Prompt Optimization

When the user wants to improve their music prompt:

1. Analyze their current prompt for specificity issues
2. Apply the 8-component formula — fill in any missing components
3. Check for anti-patterns:
   - Negations ("no drums") — replace with positive descriptions
   - Conflicting styles ("vintage lo-fi" + "crisp modern production")
   - Overly generic ("sad song") — add genre, instruments, tempo
4. Provide a before/after comparison

See: `references/prompt-engineering-guide.md` for genre templates and vocal catalogs

### Workflow 4: Debug API Errors

When the user gets an error from the API:

1. Check `base_resp.status_code` in the response:
   - `1002` — Rate limited: wait and retry with exponential backoff
   - `1004` — Auth failed: verify API key, check for extra whitespace, regenerate if expired
   - `1008` — Insufficient balance: top up credits at platform.minimax.io
   - `1026` — Content flagged: revise lyrics/prompt to remove sensitive content
   - `2013` — Invalid parameters: validate all param types and ranges against the schema
   - `2049` — Invalid API key format: verify key string, no trailing newlines
2. If `data.status` is `1` instead of `2`, generation is still in progress (not an error)

See: `references/error-codes.md` for the full error table and troubleshooting tree

### Workflow 5: Audio Quality Configuration

When the user asks about audio settings:

1. Ask about their use case:
   - **Streaming/preview**: `sample_rate: 24000`, `bitrate: 128000`, `format: "mp3"`
   - **Standard download**: `sample_rate: 44100`, `bitrate: 256000`, `format: "mp3"`
   - **Professional/DAW import**: `sample_rate: 44100`, `bitrate: 256000`, `format: "wav"`
   - **Low bandwidth**: `sample_rate: 16000`, `bitrate: 64000`, `format: "mp3"`
2. Explain output format tradeoffs:
   - `"url"`: easier to use, but expires in 24 hours — download immediately
   - `"hex"`: inline in response, must decode hex to binary, but no expiry

See: `references/api-reference.md` for valid `audio_setting` values

## Prompt Crafting Rules

When helping users write music prompts, always follow these rules:

- **Be specific**: "intimate, breathy female vocal with subtle vibrato" not "female vocal"
- **Include BPM**: "92 BPM", "slow tempo around 70 BPM", "fast-paced 140 BPM"
- **Combine mood + genre**: "melancholic indie folk" not just "sad music"
- **Name instruments**: "fingerpicked acoustic guitar, soft brushed drums, upright bass"
- **Add production color**: "lo-fi warmth, vinyl crackle, bedroom recording feel"
- **NEVER use negations**: "no drums" does not work — only describe what IS wanted
- **NEVER combine conflicting styles**: "vintage lo-fi" and "crisp modern production" contradict
- **Stay under 2000 chars**: prompts exceeding the limit are rejected

### The 8-Component Formula

Build prompts by combining these components in order:

1. **Genre/Style**: "Indie folk", "Progressive house", "Soulful blues"
2. **Era/Reference**: "1960s Motown", "modern", "80s synthwave"
3. **Mood/Emotion**: "melancholic", "euphoric", "bittersweet", "triumphant"
4. **Vocal Type**: "breathy female alto", "raspy male tenor", "choir harmonies"
5. **Tempo/BPM**: "slow 60 BPM", "mid-tempo 100 BPM", "driving 128 BPM"
6. **Instruments**: "acoustic guitar, piano, strings, light percussion"
7. **Production Style**: "lo-fi", "polished pop production", "raw live recording"
8. **Atmosphere**: "intimate", "epic", "dreamy", "cinematic"

Not every prompt needs all 8 — use 4-6 components for typical requests.

## Lyrics Structuring Rules

When helping users format lyrics:

- Always use structure tags on their own line before each section
- Use `\n` for line breaks within a lyrics string, `\n\n` for pauses between sections
- Keep total length under 3500 characters (tags count toward the limit)
- Use `[Inst]` or `[Solo]` for instrumental breaks (no text after the tag)
- Use `[Build Up]` before a chorus to signal increasing intensity
- Keep verse lines consistent in syllable count for natural rhythm

### Typical Song Structures

**Standard Pop/Rock:**
`[Intro] → [Verse] → [Pre Chorus] → [Chorus] → [Verse] → [Pre Chorus] → [Chorus] → [Bridge] → [Chorus] → [Outro]`

**Ballad:**
`[Intro] → [Verse] → [Verse] → [Chorus] → [Verse] → [Chorus] → [Bridge] → [Chorus] → [Outro]`

**Electronic/Dance:**
`[Intro] → [Build Up] → [Chorus] → [Break] → [Verse] → [Build Up] → [Chorus] → [Outro]`

**Simple/Short:**
`[Verse] → [Chorus] → [Verse] → [Chorus] → [Outro]`

### Instrumental vs. Vocal Control

- **Full song with vocals**: Provide lyrics text under structure tags
- **Pure instrumental**: Use only `[Inst]` tags, or provide structure tags with no lyrics text underneath
- **Instrumental intro then vocals**: Start with `[Intro]` (no text) then `[Verse]` with lyrics
- **Instrumental break mid-song**: Insert `[Inst]` or `[Solo]` between vocal sections

## Response Handling

When generating code or explaining API responses:

- **Status check**: `base_resp.status_code === 0` means success
- **Completion check**: `data.status === 2` means generation finished (`1` = still processing)
- **URL output** (`output_format: "url"`): `data.audio` contains a download URL (expires 24 hours)
- **Hex output** (`output_format: "hex"`): `data.audio` contains hex-encoded audio bytes — decode with `bytes.fromhex()` (Python) or `Buffer.from(hex, "hex")` (Node.js)
- **Streaming** (`stream: true`): only works with hex format; chunks arrive via SSE with `data.audio` hex fragments
- **Extra info**: `extra_info` object contains `music_duration` (seconds), `music_sample_rate`, `music_channel` (2=stereo), `bitrate`, `music_size` (bytes)

## Workflow 6: Track Generation in Google Sheets

The project includes a Python tracker at `tracker/sheets_logger.py` that logs every generation to a Google Sheet dashboard.

**Setup (one-time):**
1. User needs a Google Cloud project with Sheets API enabled
2. A service account JSON key file
3. A Google Sheet shared with the service account email (Editor access)
4. `GOOGLE_SHEET_ID` and `GOOGLE_SERVICE_ACCOUNT_JSON` set in `.env`
5. `pip install -r tracker/requirements.txt`

**Usage after generation:**
```python
from tracker.sheets_logger import log_generation

# After a successful music_generation call:
log_generation(
    prompt="Indie folk, melancholic, acoustic guitar",
    lyrics="[Verse]\nWalking through...",
    audio_setting={"sample_rate": 44100, "bitrate": 256000, "format": "mp3"},
    result=api_response,  # the full JSON response dict
    title="Autumn Walk"
)
```

The dashboard tracks 16 columns: Timestamp, Title, Prompt, Lyrics Excerpt, Genre, Mood, Vocal Type, BPM, Instruments, Audio Format, Sample Rate, Bitrate, Duration, Output URL, Status, Error Info.

Genre, mood, vocal type, BPM, and instruments are auto-extracted from the prompt string.

## Important Notes

- Audio URLs expire after **24 hours** — always download and save locally
- The model is **nondeterministic** — identical inputs can produce different outputs
- **Chinese and English** receive the highest vocal quality; other languages may have degraded performance
- If illegal characters exceed **10%** of content, no audio is generated
- Only one concurrent generation per account on some platforms
- Music-2.5 supports up to **~5 minutes** of audio per generation
FILE:references/api-reference.md
# Minimax Music API Reference

## Authentication

All requests require a Bearer token in the Authorization header.

```
Authorization: Bearer <MINIMAX_API_KEY>
Content-Type: application/json
```

**Base URL:** `https://api.minimax.io/v1/`

Get your API key at [platform.minimax.io](https://platform.minimax.io) > Account Management > API Keys. Use a **Pay-as-you-go** key — Coding Plan keys do NOT cover music generation.

---

## Music Generation Endpoint

```
POST https://api.minimax.io/v1/music_generation
```

### Request Body

```json
{
  "model": "music-2.5",
  "prompt": "Indie folk, melancholic, acoustic guitar, soft piano, female vocals",
  "lyrics": "[Verse]\nWalking through the autumn leaves\nNobody knows where I've been\n\n[Chorus]\nEvery road leads back to you",
  "audio_setting": {
    "sample_rate": 44100,
    "bitrate": 256000,
    "format": "mp3"
  },
  "output_format": "url",
  "stream": false
}
```

### Parameter Reference

| Parameter | Type | Required | Default | Constraints | Description |
| --- | --- | --- | --- | --- | --- |
| `model` | string | Yes | — | `"music-2.5"` | Model version identifier |
| `lyrics` | string | Yes | — | 1-3500 chars | Song lyrics with structure tags and `\n` line breaks |
| `prompt` | string | No | `""` | 0-2000 chars | Music style, mood, genre, instrument descriptors |
| `audio_setting` | object | No | see below | — | Audio quality configuration |
| `output_format` | string | No | `"hex"` | `"hex"` or `"url"` | Response format for audio data |
| `stream` | boolean | No | `false` | — | Enable streaming (hex output only) |

### audio_setting Object

| Field | Type | Valid Values | Default | Description |
| --- | --- | --- | --- | --- |
| `sample_rate` | integer | `16000`, `24000`, `32000`, `44100` | `44100` | Sample rate in Hz |
| `bitrate` | integer | `32000`, `64000`, `128000`, `256000` | `256000` | Bitrate in bps |
| `format` | string | `"mp3"`, `"wav"`, `"pcm"` | `"mp3"` | Output audio format |

### Structure Tags (14 supported)

These tags control song arrangement. Place each on its own line before the lyrics for that section:

| Tag | Purpose |
| --- | --- |
| `[Intro]` | Opening instrumental or vocal intro |
| `[Verse]` | Main verse section |
| `[Pre Chorus]` | Build-up before chorus |
| `[Chorus]` | Main chorus/hook |
| `[Post Chorus]` | Section immediately after chorus |
| `[Bridge]` | Contrasting section, usually before final chorus |
| `[Interlude]` | Instrumental break between sections |
| `[Outro]` | Closing section |
| `[Transition]` | Short musical transition between sections |
| `[Break]` | Rhythmic break or pause |
| `[Hook]` | Catchy melodic hook section |
| `[Build Up]` | Increasing intensity before a drop or chorus |
| `[Inst]` | Instrumental-only section (no vocals) |
| `[Solo]` | Instrumental solo (guitar solo, etc.) |

Tags count toward the 3500 character limit.

### Success Response (output_format: "url")

```json
{
  "trace_id": "0af12abc3def4567890abcdef1234567",
  "data": {
    "status": 2,
    "audio": "https://cdn.minimax.io/music/output_abc123.mp3"
  },
  "extra_info": {
    "music_duration": 187.4,
    "music_sample_rate": 44100,
    "music_channel": 2,
    "bitrate": 256000,
    "music_size": 6054912
  },
  "base_resp": {
    "status_code": 0,
    "status_msg": "success"
  }
}
```

### Success Response (output_format: "hex")

```json
{
  "trace_id": "0af12abc3def4567890abcdef1234567",
  "data": {
    "status": 2,
    "audio": "fffb9064000000..."
  },
  "extra_info": {
    "music_duration": 187.4,
    "music_sample_rate": 44100,
    "music_channel": 2,
    "bitrate": 256000,
    "music_size": 6054912
  },
  "base_resp": {
    "status_code": 0,
    "status_msg": "success"
  }
}
```

### Response Field Reference

| Field | Type | Description |
| --- | --- | --- |
| `trace_id` | string | Unique request trace ID for debugging |
| `data.status` | integer | `1` = in progress, `2` = completed |
| `data.audio` | string | Audio URL (url mode) or hex-encoded bytes (hex mode) |
| `extra_info.music_duration` | float | Duration in seconds |
| `extra_info.music_sample_rate` | integer | Actual sample rate used |
| `extra_info.music_channel` | integer | Channel count (`2` = stereo) |
| `extra_info.bitrate` | integer | Actual bitrate used |
| `extra_info.music_size` | integer | File size in bytes |
| `base_resp.status_code` | integer | `0` = success, see error codes |
| `base_resp.status_msg` | string | Human-readable status message |

### Streaming Behavior

When `stream: true` is set:
- Only works with `output_format: "hex"` (NOT compatible with `"url"`)
- Response arrives as Server-Sent Events (SSE)
- Each chunk contains `data.audio` with a hex fragment
- Chunks with `data.status: 1` are audio data
- Final chunk has `data.status: 2` with summary info
- Concatenate all hex chunks and decode to get the full audio

---

## Lyrics Generation Endpoint

```
POST https://api.minimax.io/v1/lyrics_generation
```

### Request Body

```json
{
  "mode": "write_full_song",
  "prompt": "A soulful blues song about a rainy night and lost love"
}
```

### Parameter Reference

| Parameter | Type | Required | Default | Constraints | Description |
| --- | --- | --- | --- | --- | --- |
| `mode` | string | Yes | — | `"write_full_song"` or `"edit"` | Generation mode |
| `prompt` | string | No | — | 0-2000 chars | Theme, concept, or style description |
| `lyrics` | string | No | — | 0-3500 chars | Existing lyrics (edit mode only) |
| `title` | string | No | — | — | Song title (preserved if provided) |

### Response Body

```json
{
  "song_title": "Rainy Night Blues",
  "style_tags": "Soulful Blues, Rainy Night, Melancholy, Male Vocals, Slow Tempo",
  "lyrics": "[Verse]\nThe streetlights blur through window pane\nAnother night of autumn rain\n\n[Chorus]\nYou left me standing in the storm\nNow all I have is memories warm",
  "base_resp": {
    "status_code": 0,
    "status_msg": "success"
  }
}
```

### Response Field Reference

| Field | Type | Description |
| --- | --- | --- |
| `song_title` | string | Generated or preserved song title |
| `style_tags` | string | Comma-separated style descriptors (use as music prompt) |
| `lyrics` | string | Generated lyrics with structure tags — ready for music_generation |
| `base_resp.status_code` | integer | `0` = success |
| `base_resp.status_msg` | string | Status message |

### Two-Step Workflow

```
Step 1: POST /v1/lyrics_generation
        Input:  { mode: "write_full_song", prompt: "theme description" }
        Output: { song_title, style_tags, lyrics }

Step 2: POST /v1/music_generation
        Input:  { model: "music-2.5", prompt: style_tags, lyrics: lyrics }
        Output: { data.audio (url or hex) }
```

---

## Audio Quality Presets

### Low Bandwidth (smallest file)
```json
{ "sample_rate": 16000, "bitrate": 64000, "format": "mp3" }
```

### Preview / Draft
```json
{ "sample_rate": 24000, "bitrate": 128000, "format": "mp3" }
```

### Standard (recommended default)
```json
{ "sample_rate": 44100, "bitrate": 256000, "format": "mp3" }
```

### Professional / DAW Import
```json
{ "sample_rate": 44100, "bitrate": 256000, "format": "wav" }
```

---

## Rate Limits and Pricing

| Tier | Monthly Cost | Credits | RPM (requests/min) |
| --- | --- | --- | --- |
| Starter | $5 | 100,000 | 10 |
| Standard | $30 | 300,000 | 50 |
| Pro | $99 | 1,100,000 | 200 |
| Scale | $249 | 3,300,000 | 500 |
| Business | $999 | 20,000,000 | 800 |

Credits consumed per generation are based on audio duration. Audio URLs expire after 24 hours.
FILE:references/prompt-engineering-guide.md
# Music Prompt Engineering Guide

## The 8-Component Formula

Build prompts by combining these components. Not all are required — use 4-6 for typical requests.

```
[Genre/Style], [Era/Reference], [Mood/Emotion], [Vocal Type], [Tempo/BPM], [Instruments], [Production Style], [Atmosphere]
```

### Component Details

**1. Genre/Style**
Indie folk, Progressive house, Soulful blues, Pop ballad, Jazz fusion, Synthwave, Ambient electronic, Country rock, Hip-hop boom bap, Classical orchestral, R&B, Disco funk, Lo-fi indie, Metal

**2. Era/Reference**
1960s Motown, 70s disco, 80s synthwave, 90s grunge, 2000s pop-punk, modern, retro, vintage, contemporary, classic

**3. Mood/Emotion**
melancholic, euphoric, nostalgic, hopeful, bittersweet, triumphant, yearning, peaceful, brooding, playful, intense, dreamy, defiant, tender, wistful, anthemic

**4. Vocal Type**
breathy female alto, powerful soprano, raspy male tenor, warm baritone, deep resonant bass, falsetto, husky, crystal clear, choir harmonies, a cappella, duet, operatic

**5. Tempo/BPM**
slow 60 BPM, ballad tempo 70 BPM, mid-tempo 100 BPM, upbeat 120 BPM, driving 128 BPM, fast-paced 140 BPM, energetic 160 BPM

**6. Instruments**
acoustic guitar, electric guitar, fingerpicked guitar, piano, Rhodes piano, upright bass, electric bass, drums, brushed snare, synthesizer, strings, violin, cello, trumpet, saxophone, harmonica, ukulele, banjo, mandolin, flute, organ, harp, percussion, congas, tambourine, vibraphone, steel drums

**7. Production Style**
lo-fi, polished pop production, raw live recording, studio quality, bedroom recording, vinyl warmth, analog tape, digital crisp, spacious reverb, dry and intimate, heavily compressed, minimalist

**8. Atmosphere**
intimate, epic, dreamy, cinematic, ethereal, gritty, lush, sparse, warm, cold, dark, bright, urban, pastoral, cosmic, underground

---

## Genre-Specific Prompt Templates

### Pop
```
Upbeat pop, catchy chorus, synthesizer, four-on-the-floor beat, bright female vocals, radio-ready production, energetic 120 BPM
```

### Pop Ballad
```
Pop ballad, emotional, piano-driv