If not mistaken, there is no tone generator in Sonar Platinum.
This would probably be a simple plugin to program, and it belongs to any professional DAW in my opinion.
I can't believe this would be a huge investment in developers resources.
It would notably be useful for:
- monitor calibration
- sound design
- mixing
We don't need anything fancy, It should do the basics:
- Frequency, level, rms/peak
- Length, phase shift
Wave forms:
- Sine, Square, Triangle, Sawtooth ...
- White noise
- Pink noise