Post by Bigman80 on Dec 12, 2021 14:01:38 GMT
The Soekris does OK there
I do not feel that the established understanding is incorrect in the way we phyiscal layer test, but more over in what are the relevent tests that would indicate what product 'x' sounds different from product 'y'.
Paul would never ignore anecdotal evidence, although he would not give it the credence as graphs and measurments UNTIL he had invetsigating. He thoughts were this, if enough totally independant observations were made and similar finidngs were reported he felt it wouldwarrant further investigation.
You mentioned linearity test for dac's, I suggested for the latets crop of r2r dsp controlled dacs they are quite significant differenices especially between the 44.1 and 48Khz smaple derivities, now whether this is due to these dacs have sperate ladders for each set of sample frequencies or swiyching in of multipule ladders, dsp is used the even out the freqency responses.
Below the Musicain Pegasus dac 48Khz linearity plot @ 48Kz, the second image is indentical setting of the Rhode & Schwartz UPV but this time @ 44.1Khz, you can cleary see the DSP at work there.
Last Image is of one of the stock Wadia 15's from 1994 linearity curve is very respecable indeed, which one sounds better based on thoose graps, the Pegasus has around another 10dBm lower noise floor, so you would expect graeter micro dynamics and a darker background to the music. the figures are 116s/n for the wadia dn 127s/n for the Pegasus. Listening delivers a totally different story. One has much more utterly definable ryhtymic drive and natural pace, the other is quite flat and linear with a much more resevered and laid back sound.
Pegasus 48Khz linearity plot
Pegasus 44.1Khz linearity plot
Wadia 15 linearity plot 44.1Khz
Lastly the Soekris 2541 linearity plot 44.1Khz
Pretty sure you can find plenty more of the plots oof Golden Sound and asr Martin