PSN-L Email List Message
Subject: Re: FFT Waterfall display
From: Larry Conklin lconklin@............
Date: Sat, 14 Jul 2007 10:28:46 -0400
OooooH Kay... Now I'm beginning to get motivated. I've already got
something running real time, just have to debug the thing to make the
FFT algorithm run correctly. Nothing like a declaration of
impossibility to get the old juices flowing again.
> It Is My Sincere Belief that you will
> not be able to get anywhere near
> realtime with a home PC simply because
> too many complicated iterations must
> be made for many discrete points.
> You will have to settle with after the fact
> I have tried a FFT program myself using
> my own data on a 3GHz machine and it takes
> 11 seconds to process 29 minutes of data
> each line of spectrum being seperated by
> 4.5 seconds in time.
> Each line pass representing 56.2 seconds of time.
> ----- Original Message ----- From: "Larry Conklin"
> To: "PSN List"
> Sent: Sunday, July 08, 2007 12:56
> Subject: FFT Waterfall display
>> A couple of years ago I experimented with adding a real-time FFT
>> waterfall display to my home brew data logging and display program. I
>> got the waterfall working just fine but there is something wrong with
>> the FFT calculation that I never got around to debugging. The current
>> discussion may motivate me to take another look at it. If I manage to
>> get something working, it wouldn't be much additional effort to adapt
>> the code into an independent program that would take PSN files as a
>> data source.
>> Larry Conklin
>> Liverpool, NY
>> Public Seismic Network Mailing List (PSN-L)
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> Public Seismic Network Mailing List (PSN-L)
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