https://github.com/jt-apps/sp-1-utility

Native Mac app for preparing and transferring SP-1 stem albums
https://github.com/jt-apps/sp-1-utility

alpha audio jt-apps macos sp-1 stem-player

Last synced: 17 days ago
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Native Mac app for preparing and transferring SP-1 stem albums

• Host: GitHub
• URL: https://github.com/jt-apps/sp-1-utility
• Owner: JT-Apps
• Created: 2026-06-04T22:01:29.000Z (27 days ago)
• Default Branch: main
• Last Pushed: 2026-06-07T01:54:06.000Z (25 days ago)
• Last Synced: 2026-06-07T03:14:43.472Z (25 days ago)
• Topics: alpha, audio, jt-apps, macos, sp-1, stem-player
• Homepage: https://jtapps.xyz/sp1utility
• Size: 4.51 MB
• Stars: 3
• Watchers: 0
• Forks: 0
• Open Issues: 0
• Metadata Files:
  • Readme: README.md

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README

          


  



# SP-1 Utility

[Download the Mac DMG](https://github.com/JT-Apps/SP-1-Utility/releases)

**SP-1 Utility** is a native Mac app from [JT Apps](https://jtapps.xyz) for

preparing stem albums and transferring them to a Teenage Engineering SP-1 device over USB-C.

It is built for people who want the SP-1 workflow without Terminal, Homebrew,

Python setup, or coding tools. The app bundles the local processing engine, so

normal use is just download, install, prepare, preview, and transfer.

## What It Does

- Prepares regular songs or existing four-stem folders.

- Creates SP-1-ready WAVs: 24-bit, 48 kHz, eight-channel PCM.

- Keeps prepared tracks organized in a Library view.

- Plays master and individual stem previews inside the app.

- Transfers ready albums to the SP-1 over USB-C.

- Shows connection state, transfer status, confirmed progress, and recovery details.

## Download

The app download is in [Releases](https://github.com/JT-Apps/SP-1-Utility/releases).

Download `SP-1 Utility.dmg`, open it, drag **SP-1 Utility** into

**Applications**, then launch it from Applications.

The DMG is attached to the release instead of the Code tab because it is too

large for normal GitHub repository files.

## Three Simple Functions

### Prepare

Add songs or four-stem folders, set BPM, and create SP-1-ready output.

![Prepare screen](assets/screenshots/prepare.png)

### Library

Review prepared tracks, play the preview mix, and check individual stems.

![Library screen](assets/screenshots/library.png)

### Upload

Build an album plan, watch SP-1 live controls, and transfer ready WAVs over USB-C.

![Upload screen](assets/screenshots/upload.png)

## Notes

- Keep the SP-1 plugged in and leave the Mac awake during transfer.

- Large transfers can take hours.

- A song is marked Done only after the SP-1 confirms the write sectors.

- Finder and Quick Look may not play upload WAVs normally because they are

  eight-channel device files. Use the app's Library preview for normal listening.

## Feedback And Bugs

Use the repository **Issues** tab to report bugs or feedback.

Helpful reports include:

- macOS version.

- SP-1 Utility version or release date.

- What you were doing: Prepare, Library, or Upload.

- Song title and row status, if a song was involved.

- A screenshot of the transfer panel, if upload was involved.

Please do not attach copyrighted audio files unless they are necessary and you

have permission to share them.

## Credits

SP-1 Utility includes compatibility research and workflow attribution to

[Solderless](https://solderless.engineering/) and the public

[SP-1 development wiki](https://github.com/timknapen/SP-1-dev/wiki).