Pick the sound your car makes when you walk away
Trim a sound you own on a waveform and get LockChime.wav, under 1 MB, built on your device and ready for a USB drive.
Before you start
Check the car qualifies
Open Toybox. No Boombox app, no custom lock sound. Boombox needs the Pedestrian Warning System speaker; the lock sound needs 2023.44.25 or newer.
Find your sound
Something you own, about three seconds, that survives a small outdoor speaker.
Loading the tool …
Pick a sound
It has to be yours: a recording you made, a voice memo, or a file you bought and downloaded. Tracks inside Apple Music, Spotify and the like are protected and a browser cannot open them at all.
Nothing to hand? Start from one of mine.
Trim it
The waveform opens here once you have picked a sound.
Play stops at the end of the selection.
Seconds.
Shape it
Channels, fades and the length cap open here once you have picked a sound.
Milliseconds.
Advanced
Build and save
The file is always named LockChime.wav. Tesla writes “< 1 MB” without saying which megabyte, so I stay under 1,000,000 bytes.
Pick a sound first.
An account is free and takes an email address. Three creations in 24 hours without one, no daily limit with one.
Put it on the drive
One partition, exFAT or FAT32. Tesla’s Boombox documentation says a drive holding custom sounds cannot be shared with Dashcam, so use a separate stick — a small cheap one is easiest.
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Copy the file to the top level
Straight onto the drive, not inside a folder. This is what Tesla’s release note describes: “save your own sound as LockChime.wav (< 1 MB) onto a USB flash drive”.
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Check the name
Exactly LockChime.wav. Some browsers add (1) when a file of that name is already in your downloads, so delete the old one first.
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Plug it in and pick it
Eject the drive, put it in the glovebox USB-A port — the console USB-C ports are charge-only on many cars — then Toybox > Boombox > Lock Sound.
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Make a folder named Boombox
At the top level of the drive, spelled exactly Boombox, and put LockChime.wav inside it. Tesla does not document this for the lock sound — owners report it working. Tesla documents the Boombox folder only for the custom horn sounds.
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Check the name
Exactly LockChime.wav. Some browsers add (1) when a file of that name is already in your downloads, so delete the old one first.
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Plug it in and pick it
Eject the drive, put it in the glovebox USB-A port — the console USB-C ports are charge-only on many cars — then Toybox > Boombox > Lock Sound.
Formatting a drive, which port to use, and moving a file from a phone are all in the USB guide.
- Selected
- —
- File size
- —
Pick a sound to see the size.
- Shorten the selection.
- Switch to mono.
- Drop to 22.05 kHz under Advanced.
Step 1 of 5
What is actually known
Published by Tesla
- File name
- LockChime.wav
- Maximum size
- under 1 MB
- Vehicle software
- 2023.44.25 or newer
- Hardware
- Pedestrian Warning System
- Menu
- Toybox > Boombox > Lock Sound
- When it plays
- locking from outside
Reported by owners — Unverified
- Where the file goes
- drive root, or a Boombox folder
- Length before it is cut off
- about 5 s
- Sample rate
- 44.1 kHz, or 22.05 kHz
- Menu entry label
- USB
Bit depth, channel count and any length limit are undocumented. I default to 16-bit PCM, 44.1 kHz, mono and five seconds, and every one of those is yours to change.
Questions
Can I use a song from Apple Music or Spotify?
No. Streaming tracks are protected and a browser cannot open them. You need a file you own: a purchased download, a recording of your own, a voice memo.
Does my sound get uploaded?
No. It is read, decoded and encoded inside the page. The only thing this page sends me is a count of how many files were built from this connection today.
Where exactly on the drive does the file go?
Tesla says “onto a USB flash drive”, which reads as the top level. Owners report a Boombox folder working too. Both sets of steps are in the tool.
Does it play when I unlock the car, and can I change the volume?
Tesla documents the sound for locking from outside and says nothing about unlocking or volume. Boombox only operates in Park.
Can one drive hold my lock sound, a light show and my Dashcam footage?
Tesla never says directly. Its Boombox documentation says a drive holding custom sounds cannot be shared with Dashcam, and a light show drive must not contain a top-level TeslaCam folder. Owners report combined drives working anyway. Use a separate cheap stick.
The file will not open on my iPhone.
A page added to the Home Screen cannot save files on iOS, and an app’s built-in browser often cannot either. Open frunkshow.keocodes.com in Safari or Chrome and build it there.
Acceptable use
- Use your own recordings or music you have rights to.
- No public sharing of copyrighted audio through these tools.
- No use on or near public roads.
- No automated or bulk use of the storage or email features.
Sources are on the credits page.