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Posts by jcx

depends on your goal - its a signal you wouldn't want to listen to   but it would separate out some ES amps from others   that's the point of my music "power bandwidth" comment - above ~3kHz (~highest fundamental of  acoustic tonal musical instruments) the signal level in most music drops faster than the frequency rises, meaning the signal slew rate doesn't get any higher   even percussion is somewhat rounded, seldom has full amplitude and instant rise time - but...
search should find noise threshold curves, how much worse they are for headphone listening due to microphonics of having them coupled to your muscle tremors, pulse   these should be basic 1st things to look for in any question of "is this audible"     I didn't like the Wikipedia charts - try: https://www.etymotic.com/publications/erl-0096-1997.pdf
what part of human hearing threshold do you not understand? - especially the part where the threshold is much higher for bass frequency   you can also reason from masking which follows an ~ 4th order curve so you wouldn't expect to be able to hear anything much below -80 dB below the high tone SPL at 1/10 of the high tone frequency which takes you below our ~3kHz lowest noise threshold dip   the masking cuve @ (1/30)^4 gets you down to -120 dB of the 12 kHz tone at 400...
Fourier and Time Domain are Mathematical Duals - the full complex FFT output has every bit of information as the input PCM time series - up to finite word arithmetic round off errors   the presentation is different, Fourier domain allows educated human eyeballs better resolution in some characteristics of signals that seem to map very closely to our principle hearing  place-frequency sound transduction of the traveling wave on our Basilar Membrane   the things that can...
they just do what the guy with the money asks for - even if they would rather not 
so you have a spare if you don't stuff the 3rd channel   maybe we could round up a bunch of "3-channel" owners willing to upgrade actual noise and distortion performance to 2 channel and get 1/2 a bunch more 2 channel amps "for free"
just avoid the "3-channel" silliness - active ground split supply is a useful, valid technique, but using separate "gnd" for signal and load isn't  - no amount of "testimony" will change the technical defects   I can't believe the waste of all the "3-channel" B22 builds - when you are running from very good-to-excellent dual linear supplies with a "real" ground implemented in perfectly linear, low noise Copper   well implemented two channel B22 should be better on...
the uspto could disallow an application that clearly doesn't work - but pretty much only very obvious free energy schemes are being flagged today   in the distant past working models were sometimes sent in   Black's Negative Feedback patent was in fact held up because the examiners didn't understand/believe it could work http://www.ieeecss.org/CSM/library/1993/aug1993/w04-HistoricalPerspectives.pdf
you would rather have noise and not need it?
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