The parameters to ringmod have changed, no longer supporting phase nor frequencies in hertz. I wasn’t 100% happy with how it sounded anyway, but I don’t know how to “take it apart”.
Here are the settings:
Oscillator: Sine
Frequency: 5.14hz
Amount: 75%
Phase: 45°
Inertia: Instant
Can this be duplicated in 3.1, hopefully with some more control over the oscillator?