SCALE AUDIO SOLUTIONS · REALISTIC RC SOUNDGive your RC a
real engine.
A tiny sound module that plugs into your radio-controlled car or truck and gives it a live engine note that tracks your throttle — plus horns, sirens and screeches on your aux switch. Configure everything from the SAS-FX mobile app over Bluetooth. No wires to your phone. No fiddling with a computer.
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MOBILE APP
Coming soon to Google Play
HOW IT WORKS
Three parts. That's it.
STEP 01
Pair via Bluetooth
Open the SAS-FX mobile app and tap CONNECT. Your module appears within a couple of seconds.
STEP 02
Drives with your throttle
The module reads your RC receiver signal and pitches the engine sound with your throttle position in real time.
STEP 03
Plays through the onboard speaker
A powered amplifier + speaker mounted in the truck produces the sound — no phone required after setup.
FEATURES
Realistic sound, on your terms.
016 engine profiles
V8, Inline-4, I6 Turbo, Diesel — plus two Custom slots for anything you can record.
024-stage engine sound
Cranking start, idle+accel loop, decel pop on throttle chops, reverse gear whine.
03Aux switch effects
Horn, siren, screech, backfire, reverse beeper — mapped to your CH2 auxiliary switch.
04Endpoint calibration
Teach the module your exact throttle range in seconds. Reversible per-channel.
05Custom sound uploads
Record your own engine, convert with the on-site workshop, upload to the module.
06Wireless updates
Improvements roll out to your module and mobile app automatically — no cables, no re-setup.
AUDIO WORKSHOP
Convert any audio file for your module.
Trim, normalize, and export a SAS-FX-ready WAV — MP3, WAV, M4A, OGG, and FLAC all supported. Sign in with a free account to use the workshop.
FAQ
Common questions.
Do I need a computer to set this up?
No. Everything is done from the mobile app — engine selection, sound uploads, calibration, and firmware updates.
Can I use my own engine recordings?
Yes. Sign in below and use the audio workshop to convert any MP3, WAV, M4A, OGG or FLAC into a device-ready file. Upload via the app.
Does it work with any RC?
Any RC that outputs standard servo PWM on its receiver channels. Which is essentially everything — surface, air, and marine.
How do updates get to my module?
When we ship a new update, the mobile app lets you know and pushes it to the module over Bluetooth. Takes a couple of minutes.
How do I get the mobile app?
Available on the Google Play Store. Search for "SAS-FX" or use the link on your order confirmation.
CONTACT
We're here to help.
Whether you're troubleshooting your first setup or want a custom engine sound recorded for you, reach out — we typically respond within a business day.