On Sunday 16 March 2014 19:56:32 Ralf Mardorf did opine:
> Gene :)
>
> ok, when I've got the time to do it, I will borrow the Brauner VM-1 tube
> mic + an ART tube pre amp from a friend, connect it directly to my RME
> HDSPe AIO and pick Blackbird from the Beatles on my classical guitar and
> do a recording at 48 KHz and 192 KHz.
>
> I don't know what will happen, but I suspect there will be no audible
> difference.
>
> Regards,
> Ralf
>
>
Even with tons of string squeaks from wound strings and heavily callused
fingers, I doubt if that would reach high enough to be a valid test. You
need a few crickets singing in the background, (typically 17 Khz) and some
heavy action on a brushed snare drum to generate very much in the range of
sound that would test it for sure. A "white noise" generator made out of
the usual 17 stage xor gated shift register for feedback, clocked at 50Khz
or more might be a good test, the white noise will seem to have a odd,
often disagreeable, definitely non-harmonious pitch to it.
But I haven't seen that schematic in yonks. Take a look at
<http://en.wikipedia.org/wiki/Linear_feedback_shift_register>
Some of the longer ones are pretty decent. the 17th register addition is
one I heard once, sounded pretty white to my ears at the time.
Cheers, Gene
-- "There are four boxes to be used in defense of liberty: soap, ballot, jury, and ammo. Please use in that order." -Ed Howdershelt (Author) Genes Web page <http://geneslinuxbox.net:6309/gene> _______________________________________________ Linux-audio-user mailing list Linux-audio-user@email-addr-hidden http://lists.linuxaudio.org/listinfo/linux-audio-userReceived on Mon Mar 17 04:15:02 2014
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