AI ringtone maker by API: Lyria 3.5 plus a Timeline audio cut

To make an AI ringtone by API, generate a short loopable track with the Sume Music Router (Lyria 3.5), then cut the best seconds with a Timeline audio split job. Google's Gemini post lists personalized ringtones as a Lyria 3.5 template, read 2026-10-01. Sume gives you audio files; it does not package them for a phone's ringtone format.

How do I generate the track?

Ask for a tight idea with a clear first beat, and mark the length in the prompt, since there is no duration field. A music generation costs a fixed $0.125.

{
  "model": "lyria-3.5",
  "prompt": "Playful marimba and bell motif, 124 BPM, D major. [0:00-0:20] Hook, then a clean ending. Instrumental, no vocals."
}

How do I cut the clip?

Timeline audio split takes up to 20 ranges from one source and returns wav by default or mp3. It costs $0.01 per job. Import the track to media.sume.com first if it is not already there; Timeline accepts only Sume-hosted URLs.

What is not covered?

The docs do not describe phone ringtone formats, so do not claim wav or mp3 output is ready to install on a given phone. Convert and test on your target device yourself.