In article , Ian Bell
wrote:

Yes, that's pretty much it. I do not particularly need a reference so
much as a convenient source of low distortion test signals.

FWIW I tend to use either a CD player or a computer for that. Then use a
recorder to record the results. Where referencing is needed I use one
channel of the recorder to record the stimulus and the other the response.

For example, this is what I did to obtain the results shown on

http://www.audiomisc.co.uk/ArchiveMa...2/Testing.html

which let me assess the in-room response from a loudspeaker, including
measuring the phase/time effects.

I agree that what you use is a matter of what you find convenient. However
I also tend to be concerned to ensure that sources are well defined and
well behaved. An advantage of using a good audio playing device is that
it can deliver good output signals. Given my background in measurement
labs I guess I am not bothered by the idea of using seperate dedicated
items for the different roles in the measurement process.

Slainte,

Jim

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