Feature Request: Adding dB to blank.detect

[mooseh]

Describe the solution you'd like
when using black.detect it would be good for the dB to passwed to the on_blank on_noise functions like so

blank.detect(on_noise=fun(db) -> print("volume detected at #{db}"), radio)

**Describe alternatives you've considered**
currently i am passing rms / peak to the source and running .peak on noise and .rms on blank