01
Connect Medux MCP to Codex
Add the Medux remote MCP endpoint to Codex, provide an authorized credential, and confirm that the medux_shift_audio_pitch tool is available.
Codex MCP tutorial · media
How to shift audio pitch with Codex MCP and Medux
Use Codex and Medux through MCP to raise or lower the pitch of an audio file. This guide covers input preparation, the approval gate, task monitoring, and a concrete output check.
POST/api/app/v1/process/audio/shift_audio_pitch
Shift the pitch of an audio file.
Open the Shift Audio Pitch API reference →Codex-specific workflow
Run Shift Audio Pitch as a Codex MCP task
Use the active workspace as the source of truth. Ask Codex to identify the source audio and exact pitch-shift value, select medux_shift_audio_pitch, and keep the Medux task ID and returned output with the rest of the project. Naming the input roles and the expected result prevents an agent from guessing which file should be used where.
Codex prompt pattern
In this workspace, use medux_shift_audio_pitch through Medux MCP to shift audio pitch.
First inspect and identify the source audio and exact pitch-shift value.
Show me the exact tool arguments before execution.
After the task completes, return the pitch-shifted audio and verify that the pitch changed by the requested amount and the audio remains complete.Approval gate
Before approving the call, compare the selected tool, file or asset IDs, ordering, timing, and output settings with the request. If a local filename was mapped to an uploaded Medux file ID, keep that mapping visible so it can be audited later.
Result verification
Let Codex monitor an asynchronous task until it reaches a terminal state, then save or report the pitch-shifted audio. The final check is explicit: confirm that the pitch changed by the requested amount and the audio remains complete.
What this tutorial does
Medux operation
Shift the pitch of an audio file.
Agent workflow
Codex selects medux_shift_audio_pitch, presents the arguments for review, calls Medux, and reports the response.
Before you start
Authentication
- Authentication is required via Authorization header.
Preconditions
- Upload the source file and create a file reference before calling this endpoint.
- Successful requests return a Medux task record immediately. Use the task query or sync endpoints to track completion.
- All file inputs must be uploaded and persisted as file references before submission.
Prompt Codex
Start with a clear instruction that names the Medux operation and the intended inputs.
Shift the pitch of an audio file.Request fields to review
Confirm these values before approving the MCP tool call. The linked API page remains the source of truth for current limits and response semantics.
| Field | Type | Requirement | Purpose |
|---|---|---|---|
input_file_id | string | Required | Input audio file id. |
semitones | number | Required | Pitch shift amount in semitones. |
sample_rate | integer | Optional | Output sample rate, default 44100. Default: 44100. |
model_id | string | Optional | Model Default: shift-audio-pitch-default. |
title | string | Optional | Optional task title. |
Step-by-step workflow
02
Prepare the required inputs
Prepare the source files, asset IDs, text, or settings required by the operation. Upload local media first when the tool requests file IDs.
03
Ask Codex to run Shift Audio Pitch
Use one direct instruction with the intended values. Codex should select the Medux tool and show the proposed arguments before execution.
04
Review and approve the tool call
Check that the tool is medux_shift_audio_pitch and that each file ID, task ID, option, and output setting matches your request before approving it.
05
Check the Medux response
If Medux returns an asynchronous task, let the agent monitor it until completion; otherwise review the immediate response and save any result identifiers or output URLs.
Workflow recap
User goal
↓
Codex selects medux_shift_audio_pitch
↓
Review inputs and approve the tool call
↓
Medux runs Shift Audio Pitch
↓
Codex reports the response and outputFrequently asked questions
Can Codex use the Medux Shift Audio Pitch API through MCP?
Codex can call the medux_shift_audio_pitch Medux MCP tool to shift the pitch of an audio file. This guide covers the required inputs, approval flow, result handling, and the matching API reference.
Which MCP tool does this tutorial use?
This workflow uses medux_shift_audio_pitch. Review its arguments before approval and consult the API reference for the current contract.