OTOTETSU

qt sound lab.

About this app

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.

[System Requirements]
Android 10 or later

Ratings and reviews

Benn a long time user and it's been a great app to make custom vvvfs. However, with the recent update, the app seems glitchy whenever a sound is playing, but still managed to hear the actual sound. If the glitches are away, this would be a 5 star app. So until then, 3 stars. Not too bad, but definitely need some improvement

it's quite useful for VF drive enthusiasts like me to create new traction motor to the train, but otherwise it looks great, the only downside I experience (which was in new update) is the waveform acceleration, braking and cruising audio making Crackling and Popping noises that some people might complain like me, which is needed to fix a problem, other words, it needs another maintenance version which I didn't like the way crackling and popping sounds appear, otherwise, great app nevertheless!

The principle of the app is very good. It could be improved by making the waves in the sound less noticeable, and by adding DC motors.

What’s new

- Modulation index can now be set manually.
- Tweaked PWM waveform generation in the wide 3-pulse mode of 2-level inverters.
- Reduced the minimum number of teeth on the pinion to 5.