[karle]

Thanks,

I want to know if average people can really hear the difference between,
44.1, 48, 88.2, 96, an 192 khz.

The advice I need is, should I:

1-Start with a 192khz source, downsample it and play it back at the
downsampled rates on the D to A converter
2-Start with a 192khz source, downsample it and play it back at the highest
rate on the D to A converter
3-Record the same performance at different sample rates and then play it
back at its native sample rate

Karle


"Scott Dorsey" wrote in message
...
karle wrote:

I will be doing some tests, to find out if people can really hear the
difference if a song is played at different sampling rates.

What kind of rates?

In general, if you make broad sweeping changes to the sampling rate, it
is usually inaudible unless there is bandlimiting going on in the process.
But, many sample rate conversion algorithms do very bad things when the
input and output rates are close to one another. You can make an AD1890
go berserk with two clocks that are only a few tens of hertz apart.

Rate conversion algorithms have changed a lot, too. Some early
implementations
had some numeric precision issues that wound up creating audible
artifacts.

Does anyone knows about a computer / Software / Hardware bundle that would
enable playing songs and changing the master clock on the fly? I would
need
the DA converter to switch its clock automatically, according to the
signal
it receives at the inputs and the finest equipment if possible.

Most outboard D/A converters will do this without any problem. Note that
most converters today are sigma-delta converters so you already have some
internal rate conversion going on inside the box.

Also, if you already conducted such an experiment, I'd like to know how
you
did it.

I haven't, but Steven Harris did a bunch of listening tests when he was
with Crystal Semiconductor, and a poke at old JAES issues should turn some
up.
--scott

--
"C'est un Nagra. C'est suisse, et tres, tres precis."