I inherited this project that used NAudio 1.7.1.16.
In there they use SignalGenerator.Frequency1 and SignalGenerator.Frequency2 to generate a TwoTone sound.
However, the later version 1.7.2 and latest 1.7.3, Frequency1 and Frequency2 and SignalGeneratorType.TwoTone does not exist any more!
So how do I do the TwoTone thing with the latest version of NAudio?
You must have inherited a custom build of NAudio. NAudio's SignalGenerator has never had a TwoTone option. It has been unchanged ever since it was added in 2012.