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About pkane2001

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  1. Hard to tell but likely an artifact of DSP processing during capture/processing or some noise recorded from an external device (alarms, certain video devices, etc.) The fact that there are two such lines at non-harmonic frequencies makes an external source less likely.
  2. New version of DeltaWave 1.0.70 is now available. Changes in 1.0.70b Added: support for log-frequency display in spectrograms Fixed: the name of FFT window: Tukey0.01 was misspelled Spectrogram log frequency display is controlled by the same Log Axis option as before:
  3. Probably not what you're looking for, but this does transmit USB 2 over CAT5e/CAT6 cable over long distances. https://www.amazon.com/gp/product/B01EV33R8S/ Works well in my main system for the past 4-5 years, including transmitting DSD512. Nice thing is it can be powered on the computer side with its own power supply or even a battery. While the DAC-side receiver can also be powered independently, power there is not required if the PC-side power is plugged in.
  4. I thought we were discussing the various interpretations of the word ‘no’.
  5. Absolutely. I’ve had an Apple Music subscription for a long time, but rarely listened to it, preferring my own music library that I knew was properly sourced and encoded, and not damaged in some way. Apple lossless and hires seem to be moving things in the right direction, even if not bit-perfect. I’m still not sure what their Masters recording is supposed to be compared to hires.
  6. Or ‘improved hires’? I think I’m ready to go into marketing.
  7. I’m not sure that Apple is lying. They provide high resolution music that’s at higher sampling rate than the CD and with more than 16 bits. They provide up to 23 bits out of 24 based on my testing. While it’s not bit-perfect, it is certainly high resolution and not lossy-compressed… at least up to 23 bits.
  8. Since the test couldn’t possibly demonstrate anything but the tester’s own perception or lack thereof, I assume that was the goal. And for that goal, the test was sufficient as conducted.
  9. If the goal is to prove something is inaudible to a large group, sure you’ll need to run many tests with multiple individuals with strict protocols and controls. If the goal is to test if you yourself can perceive the difference, then SimoneF has done as good a test as was needed for the purpose. Maybe a little more double blinding and checks for any tells may have been needed, but I’ve not seen the details, so can’t comment.
  10. But, but... my eyes move differently when reading the bolded text compared to the italic! The noise generated in my head due to the extra work needed to undo different text formatting must be creating enough analog noise to drown out the digital signal. No?
  11. That was found in multiple Apple Music streams, from lossless to hi-res when compared to the original track. The signal at around 20Hz was certainly not there in the original, but was introduced by Apple, intentionally or unintentionally. I know of no good reason to modulate music at around that frequency by modifying the least significant bit, other than trying to encode something in the music that's below perception and not easily detected.
  12. That last bit appears to be modulated by low frequency "noise", which I'm guessing, contains watermark data spread out to look like noise:
  13. While sibilance can be an audible and annoying issue, so can the frequency response, plus both can be related. Which one sounds worse is obviously personal and subjective. HF boost/dip by a few dB isn't going to be very audible simply because our hearing isn't as sensitive at HF. Try a few dB boost or a dip around 3-4kHz to see if it's audible or objectionable.
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