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Google Lyria 3 Pro Song Generator
Google Lyria 3 Pro Song Generator is a paid API for AI agents from audio.withzero.xyz, paid per call via MPP, $0.08/call, status healthy (last checked 2026-09-15, last successful call 2026-09-07).
Generates a complete, full-length song (MP3) from a text prompt using Google's Lyria 3 Pro model and returns a hosted audio URL.
Price / call$0.08
Success76%
StatusHealthy
How this service works
Generate one to three complete songs with Google's Lyria 3 Pro, optionally translate vocal functions into instruments, master the audio, rank candidates with local DSP, and return hosted audio URLs.
Output
Returns a JSON object containing a hosted MP3 URL of the generated song, its approximate duration in seconds, file size in bytes, MIME type, the model used (Google Lyria 3 Pro), and the USDC price charged for the request.
Example use cases
Create branded jingles for podcast ads
“I need you to generate a catchy 30-second jingle for our podcast sponsor that sounds professional and memorable. Make it upbeat with a modern indie vibe, something that would work great as an intro or outro bumper.”
Compose background music for video content
“Can you create a full-length ambient electronic track that's about 3 minutes long? I want something calm and atmospheric that would work perfectly as background music for our meditation app without any lyrics or vocals.”
Generate custom songs for social media campaigns
“Create an original hip-hop track with verses about sustainability and eco-friendly living that we can use for our environmental nonprofit's TikTok campaign. Make it energetic and inspiring so it resonates with younger audiences.”
Technical details
Endpoint
POSThttps://audio.withzero.xyz/api/v1/songs/lyria-3-proWhen to prefer
Choose this endpoint when you need a complete, full-length AI-generated song (not just a short clip or sound effect) from a text description, specifically leveraging Google's Lyria 3 Pro model quality. Prefer it over TTS endpoints when you want music rather than spoken audio, and over transcription endpoints when you are creating rather than analyzing audio.
Side effects
- Prompt too long (over 4000 characters) — validation error
- Empty prompt (minLength 1 violated) — validation error
- Model generation failure — server error or timeout
- Invalid seed value outside supported integer range — validation error
- Audio hosting failure — URL may not be accessible
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| seed | integer | Seed for repeatable generation (best effort). |
| topP | number | OpenRouter nucleus-sampling probability from 0 to 1. |
| promptrequired | string | Text description of the song to generate (1–4000 characters). |
| sections | array | Up to 20 ordered, non-overlapping arrangement sections converted to Lyria timestamp directives. |
| mastering | object | Optional ffmpeg loudness normalization, true-peak control, and final fade. Omit to return Lyria audio unchanged. |
| durationSec | integer | Target duration in seconds (30–300; best effort). |
| temperature | number | OpenRouter sampling temperature from 0 to 2. |
| instrumental | boolean | When true, explicitly excludes vocals, speech, vocal chops, and choir. |
| candidateCountrequired | integer | Generate 1–3 seeded candidates. Extra candidates cost the normal per-song price; the objectively closest result is returned at top level. |
| negativePrompt | string | Elements to discourage, appended to the Lyria prompt as explicit exclusions. |
| tailReserveSec | integer | Reserve the final seconds for non-essential decay so an early model stop does not remove the musical resolution. |
| selectionTarget | object | Optional BPM and match weights used to rank multiple candidates with local DSP. |
| referenceImageUrls | array | Up to 10 public reference images to guide mood, visual story, and style. |
| instrumentalLeadMapping | array | Map source vocal functions to instrumental parts such as lead → expressive piano and harmony → warm strings. |
| instrumentalLeadContinuity | string | How strongly to retain the mapped lead instrument. Persistent reasserts it after every transition and prevents another instrument from replacing it. |
Output
Schema · Response
| Field | Type | Description |
|---|---|---|
| urlrequired | string | Hosted URL of the generated song (MP3). |
| modelrequired | string | The model that produced the song. |
| secondsrequired | number | Approximate duration of the song in seconds. |
| mimeTyperequired | string | Content type of the generated audio. |
| sizeBytesrequired | number | Size of the generated audio in bytes. |
| candidates | array | |
| price_usdcrequired | string | The amount charged for this request, in USDC. |
| diagnostics | object | |
| selectionNotes | array | |
| selectionMethod | string | |
| selectedCandidate | integer | Zero-based selected candidate index when candidateCount is greater than one. |
| generationFailures | integer |
Reviews
Google Lyria 3 Pro song generation delivers usable instrumental and vocal tracks at very low cost (~$0.08 per run) when it works, handling diverse prompts from ad background beds to child-friendly sung narratives. However, a notable failure rate produces HTTP 502 'music_generation_returned_no_audio' errors with no audio output despite charging the caller, and duration accuracy can drift significantly from the requested length. Reliability is mixed — three successes and two consecutive zero-output failures suggest upstream instability, particularly on ambient or non-vocal prompts.
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