slightly ot: battery driven microphone

Magnus Danielson cfmd at swipnet.se
Wed Aug 9 22:03:36 CEST 2000


From: Martin Czech <czech at Micronas.Com>
Subject: Re: slightly ot: battery driven microphone
Date: Wed, 9 Aug 2000 09:08:39 +0200 (MET DST)

> 
> :::Oh, do you use the early wave trick or not?
> :::
> :::Please refresh us on what you are doing and how. (Show me the code!)
> 
> Early wave? Does this refer to free air measurements and avoiding ground
> reflexions?

Yeah, that was the auto-calibration trick one can use if you ain't got anything
better going. If you do got anything better (a premade calibration) then you
are in a diffrent league.

> Code:
> 
> Magnus, I've written a suite of stupid little programs,
> one for fft, one for windowing and so on.
> The read and write numbers in ASCII format.
> Advantage: easy to do. Programs can be chained via script.
> 
> Disadvantage: may be slow on home computers, large
> data.
> 
> It's all quick and dirty, I want to clean it up a little bit
> before sending...

SO? I did not expect a fully-fledged graphical tool or anything, besides, that
was not even the code I was interested in. My interest lay in seeing what
algorithms you had going, just have a peek really, out of curiosity.

BTW. CPU cycles is there to use, a second of idle time on your machine is just
a whole bunch of wasted cycles. ;) As I write this my machine has many, many
million wasted cycles per second and I still think I am doing something usefull
with my machine... what a illusion!

Cheers,
Magnus



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