> Lorick wrote:
> > Someone suggested another way for me to measure the RMS of a sine wave by
> > just multiplying the samples by .707 using floating point methods and
> > accumulate that in just 16 bits.
>
> I might be able to make a reasonable suggestion if I know a bit
> more about what you are doing. There are often alternatives to the
> full blown floating point megamemory approach.
>
I must admit... my first reaction is to stick an RMS
analog i.c. between the source and the A/D input if all the
specs match. In a one off/medium cost app this beats
flogging the brain cells into deeper dementia and may be
more accurate (quantizing errors come after the
conversion, not before).

_____________________________

Lance Allen
Technical Officer
Uni of Auckland
Psych Dept
New Zealand

www.psych.auckland.ac.nz

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