medien.halowerk.com

Takes an audio or video file and transposes it by a number of semitones from -12 to +12 while keeping tempo and running time, using the Rubber Band library through ffmpeg. With preserve_formants on, voices keep their natural timbre instead of sounding like cartoon characters — useful for practice tracks in another key or light voice anonymisation. Pitch-shifting is not a secure anonymisation: it c

Open endpoint ↗

Price per call: $0.003
Chain: Base
Method: POST
Paid calls · 30 days: 1

Call it from code

This API is run by its own provider and paid directly through x402. We list it so you can find it; we don't route or hold the payment.

import { x402Client, wrapFetchWithPayment } from "@x402/fetch";
import { registerExactEvmScheme } from "@x402/evm/exact/client";

const client = new x402Client();
registerExactEvmScheme(client, { signer: agentAccount });

const pay = wrapFetchWithPayment(fetch, client);
const res = await pay("https://medien.halowerk.com/v1/pitch-shift", { method: "POST" });
console.log(await res.json());

https://medien.halowerk.com/v1/pitch-shift