Custom Lock Sounds  Setup Guide

• A USB flash drive — you can reuse the one already plugged into your car's glove box (Model 3 / Y) or center console (Model S / X / Cybertruck). No need to format it if it's already working for music or dashcam.
• A computer to copy the file over.
• One .wav file, under 1 MB (roughly 1–2 seconds). Larger files are silently ignored by the car.
• A Tesla with the external pedestrian speaker (most Model 3 / Y / S / X from 2019+ and Cybertruck). Pre-2019 cars without the external speaker can't play custom lock sounds.

1. Use your existing USB drive if you have one. Most owners already have a drive in the glove box or center console for music or dashcam — you can just add the lock sound file to it. Only format a drive if it's brand new or the car doesn't recognize it. If you do need to format, use exFAT or FAT32.
2. Rename your file to exactly LockChime (capital L and C). Windows and macOS often hide the .wav extension — if you type LockChime.wav on a file that already ends in .wav, it becomes LockChime.wav.wav and the car will not see it. Turn on "show file extensions" if you're unsure.
3. Copy LockChime.wav to the root of the USB drive — not inside a folder. No /Boombox folder is needed for the lock sound.
4. Safely eject the drive and plug it back into the media USB port — glove box on Model 3 / Y, center console on Model S / X / Cybertruck.
5. In the car: Toybox → Boombox. Turn on "Locking Sound", then choose USB as the source and select your LockChime file. Tap Preview to hear it.
6. Walk away from the car or lock with the app — you'll hear your sound from the external speaker.

The #1 reason custom lock sounds don't work is the filename — almost always the hidden .wav.wav double-extension or wrong capitalization on LockChime.

A few of the most reliable libraries Ohio owners use:

1. Open the audio file in Audacity.
2. Select the 1–2 second segment you want.
3. File → Export → Export as WAV. Encoding: Signed 16-bit PCM.
4. Name the exported file LockChime and save it to the root of your USB drive (not in a folder). Confirm the final filename is LockChime.wav — not LockChime.wav.wav.

• Nothing plays? 99% of the time it's the filename. Make sure it is exactly LockChime (capital L and C) and that the final file is LockChime.wav, not LockChime.wav.wav. Turn on "show file extensions" in your OS to check.
• File too big? Lock sound files must be under 1 MB. Trim or re-export at a lower bitrate.
• Drive not recognized? Reformat to exFAT or FAT32 and put LockChime.wav at the root — not in a folder. Use the glove box USB port.
• Sound plays but feels quiet? Normalize the .wav in Audacity (Effect → Normalize → −1.0 dB) before exporting.
• Disappears after an update? Tesla occasionally resets the Boombox selection. Re-enable Locking Sound in Toybox → Boombox and reselect USB.
• Respect your neighbors. Boombox can be loud — keep it tasteful in apartment lots and at meetups.