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From: oster@well.sf.ca.us (David Phillip Oster)
Newsgroups: comp.sys.mac.programmer
Subject: Re: How to get rid of clicking?
Keywords: Sound Driver
Message-ID: <18389@well.sf.ca.us>
Date: 7 Jun 90 06:00:21 GMT
References: <1990Jun4.020601.9644@msuinfo.cl.msu.edu>
Reply-To: oster@well.sf.ca.us (David Phillip Oster)
Organization: Whole Earth 'Lectronic Link, Sausalito, CA
Lines: 20

In article <1990Jun4.020601.9644@msuinfo.cl.msu.edu> gurney@cpsin2.uucp (Eddy J Gurney) writes:
>Also, while I'm posting... has anybody come up with a way to specify a
>FREQUENCY to FTSoundRec.sound1Rate instead of the rate?  IM II gives the
>equation: 
>             frequency = FixMul(rate,FixRatio(22257,256))
>I solved this for frequency, and got: (Actually, I had my HP-48SX do it.  I
>didn't want to be flamed for not solving correctly :-)
>             rate = FixRatio(frequency,FixRatio(22257,256))
in floating point, this is:
	rate = frequency / (22257. / 256.);
Or, in fixed point:
	rate = FixDiv(FixRatio(frequency, 1), FixRatio(22257,256))

If the FixRatio(frequency, 1) offends you , you can also say:
#define FIXED(f) ( ((long) (f)) << 16)
and say	FIXED(frequency)

-- 
-- David Phillip Oster - Note new address. Old one has gone Bye Bye.
-- oster@well.sf.ca.us = {backbone}!well!oster