You're probably even more interested in the lowest frequency component of the bass itself.  If you're able to freeze JAAA at a point where the bass is playing a loud clear note and there isn't much other noise, then you should be able to see a pattern in the spectrogram.  There should be a series of evenly spaced spikes or bumps. If you want to verify you've identified them correctly, if you watch JAAA in real-time, you should see these spikes "bump up" whenever the bass comes in.  Find the frequency of the lowest spike and that is the frequency of the lowest component of the note the bass is playing.

Jeremy
On Tue, Aug 28, 2012 at 7:52 AM, Harry van Haaren <harryhaaren@gmail.com> wrote:
I use Fons' JAAA for this. It has a "freeze" button, so when you hear a low note, you'll see it, then hit freeze, then there's peak analysers that you can place on the display, and it'll tell you its Hz (and estimate a note). dB can be read right off the Y axis.

It doesn't analyse the whole song as such, but it'll get you going. Small post on DnB production / mastering, uses JAAA for visualizing the audio: http://openavproductions.blogspot.ie/2012/02/dnb-production-mastering-eq.html

Cheers, -Harry


On Tue, Aug 28, 2012 at 5:54 AM, Bearcat M. <hometheater@feline-soul.com> wrote:
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

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