[LAD] Listing lowest and highest frequencies in a track?

[Bearcat M. Şándor]

Folks,

Is there a Linux program out there that i can throw a wave file at that
will tell me what the lowest and highest frequencies are in it, where
they are and at what dB they occur?

I was listening to some dubstep today and wondering how low it really
went. I would bet that most of the "bassy" music i have doesn't even go
below 30 hz.

Thanks,

Bearcat