Originally Posted by MTVhike
I don't want to invest any more time if this problem does exist; How can I test for it?
I have a bunch of things to say:
A. I am not the originator of this data so I can't vouch for its accuracy nor the methodology used.
B. It could be an issue only with a very rare cartridge with an abnormally loud output level compared to most, so 99% of people would never notice it, I don't know.
C. Even the supplier of this data [top Amazon review
] admits to not hearing it but only seeing the problem on Audacity waveform images. If I'm understanding him correctly he's comparing the output of the UFO202 using its RIAA EQ phono preamp to a raw recording without RIAA EQ [and then applying it later after the fact in software?]
D. I can see why he can't hear it: it seems very mild. Only exceeding brief transients, peaks, needle thin bursts in the supplied image [see the prominent one at 3 seconds on the bottom image] look as if the have been cut off or "clipped" [the top image] compared the raw signal [image below]:
In a weird sense what the UFO202 is doing could theoretically be beneficial for some: recording the signal at the absolutely loudest you possibly can helps keep the pesky background hiss at bay. Recording engineers often use a device to purposefully get the exact same effect called a "limiter".
Also in theory these tiny, thread thin transients it is clipping or "brick wall flattening" are possibly actually pops and ticks on this poor condition LP and they never existed in the original master file itself. We would need to see the same song from a digital file, like from a CD, to verify that.