OTOTETSU

qt sound lab.
1.7.0

Aug 31, 2026
Update date
Everyone
Android 9.0+
Android OS

Download APK (32.5 MB)How to install XAPK / APK file

Use APKPure AppGet OTOTETSU old version APK for Android

Download

About OTOTETSU

VVVF Inverter Sound Simulator

When electric trains accelerate and decelerate, we can hear some characteristic sounds, which is caused by inverters' controlling the torque and the rotational speed of the motors.

This app simulates the waveforms generated by inverters and sounds coming from motors, and you can also design sounds of imaginary trains.

Additional APP Information

Latest Version

1.7.0

Uploaded by

กฤษฎา คงเถียร

Requires Android

Android 9.0+

Available on

What's New in the Latest Version 1.7.0

Last updated on Aug 31, 2026

- The master controller can now be mounted vertically.
- You can now select the number of notches on the master controller.
- Added a feature for switching patterns automatically between acceleration and braking.
- Added support for setting the speed range for each inverter configuration using the inverter’s output frequency.

Download APK (32.5 MB)