In article , Paul B
wrote:


I suppose a further option would be a PC based audio spectrum analyser.
I don't know much about them apart from their existence. I would guess
that the s/w may handle THD & maybe also intemod as well. I don't know
if a programmable source is included, an option or separate. Intermod
would obviously require 2 tones.
http://www.picotech.com/applications/spectrum.html
http://www.taquis.com/home.htm Some look to use your existing sound card
for FFT based analysis using its ADC.

FWIW At home if I want to analyse something I tend to record onto CD-R,
then load the data onto my computer and analyse it there.

Bit depth will have a big impact on resolution.


Erm... The number of bits per sample may have an effect of the dynamic
range / noise floor. However provided the input is dithered and you have a
fair number of samples you should be able to get well over 100dB range
without too much problem. e.g. being 32k samples with 16bits/sample.

I'd hope that a dynamic range of 100dB would suffice for most concerns
about distortion in domestic audio kit. :-)

The frequency resolution will depend on the number of samples.

Slainte,

Jim

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