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  1. Patrick Harper

    Measurements of DACs, CD players and computers

    I believe digital audio has been a solved problem since dithering and noise shaping was devised to preserve dynamic range during reduction from 24-bit to 16-bit quantisation, and DSD64 managed to achieve marginally favourable performance from particular hardware designs. The applications for...
  2. Patrick Harper

    Measurements of DACs, CD players and computers

    This is a bit different to most measurements on this forum as they were done for a dissertation in pursuit of a BSc in audio engineering. Skip to page 11 to avoid the fluff. I used other contributed measurements to aid in my...'analysis'. Reviewing this and the poster hurts me a little because...
  3. Patrick Harper

    Geshelli JNOG2 Review (Balanced DAC)

    I like the the form of this unit but as I only need to clear 16-bit audio, and I don't need USB, there must be means of making a cost-reduced version, perhaps with a cheaper DAC chip. Perhaps I should get into this business.
  4. Patrick Harper

    CD Players With and Without Compact Disc Digital Audio Logo vs. Red Book

    CD-DA playback can only be gapless if the divisions between tracks fall on a CD sector, which in terms of samples is a multiple of 588 or a 75th of a second. So burning CD-Rs with Track-At-Once mode is a no-go. As long as this is the case and no pre-gaps have been authored into the CD master...
  5. Patrick Harper

    Why is it difficult to get CD quality car audio gear?

    My guess is that car interior spaces are good at avoiding 'room modes' given their shape and the fact there's often carpets and sound-absorbing material everywhere. Not so much with your average living room.
  6. Patrick Harper

    What is your main OS (operating system) at home?

    I've used OpenBSD as my main OS for the last four years, before that various Linux OSes, mostly Debian and openSUSE. When I started on OpenBSD I used Xfce as my interface but since then I have rotated through FVWM 2.2, FVWM 2.6, cwm, mwm and GNOME. I think I'll only be settled once I write my...
  7. Patrick Harper

    Cd/dvd/blue ray + Dac

    Your computer probably doesn't have an HDMI or SPDIF input so that isn't going to work. If it's a laptop then you'll need a drive with a USB interface.
  8. Patrick Harper

    Cd/dvd/blue ray + Dac

    Most older DVD and Blu-ray players have TOSLINK or coax SPDIF so I'd just plump for one of those. Some of the better built ones that are cheaper than Oppos are the Philips BDP-7500, 9500, 9600 and 9700. Pioneer doesn't seem to host firmware updates for their older models anymore so I wouldn't...
  9. Patrick Harper

    Welcome New Members to ASR, introduce yourself here.

    Hi all, I'm a 24-year-old from the south of England, UK. I found this forum a couple of years ago. I can't say my mind has changed much on audio matters since, I never invested much in dubiously premium products and I left the vinyl scene before it really started getting cool. The first...
  10. Patrick Harper

    Decoder for material with latent DolbyA encoding

    Just a moment ago I discovered this thread, plus similar ones on other sites, and I'm rather startled because since 2018 I've been on a quest for a set of optimal filters for the 1992/1993 ABBA CD releases. This includes not only Gold and More Gold but some maxi-singles with tracks not on the...
  11. Patrick Harper

    Khadas Tone 2

    The name 'Tone 2 Pro' suggests to me that somewhere down the line there will be a barebones version with the features of the original board. If its performance rivals things like Panasonic's top Blu-ray spinner then it'll definitely go on my wishlist.
  12. Patrick Harper

    Digital vs Vinyl

    There's a few niche cases to keep a vinyl copy of something. Case in point - all of the side A tracks from ABBA's The Album gained unwanted distortion when the album's production master was recorded. So all of the first edition presses of The Album on vinyl, plus the 1984 and 2005 CDs are...
  13. Patrick Harper

    High Resolution Audio: Does It Matter?

    I always had the impression that by adding noise-shaped dither when converting 24-bit PCM to 16-bit PCM, that it was possible to retain about 120dB of dynamic range instead of the nominal 96dB (https://www.aes.org/e-lib/browse.cfm?elib=6647). It's easy to tell whether this has been done for...
  14. Patrick Harper

    .

    Also, not all digital outputs may be bit-perfect...
  15. Patrick Harper

    What are we listening to right now..

    This album dropped a week agp. It doesn't tug your heartstrings as much as Klangstein's previous efforts but I found it alright.
  16. Patrick Harper

    .

    I'm going to dig up this thread because a comment I found, supposedly made by a chap on audioreview.com about a TASCAM CD-160 in 2008 made me question the subject of this thread. I'll post the relevant section here: If the sort of design faults he's alluding to are legitimate ones, then how...
  17. Patrick Harper

    16-bit... It really is enough!

    I suspect 48kHz wouldn't have permitted Beethoven's 9th to fit on a 12 inch disc. 44.1kHz is fine. The best resamplers available today are practically transparent.
  18. Patrick Harper

    Is lossy outdated in 2019 & onwards?

    Opus VBR 160kb/s is good enough for listening. Even for 44.1/88.2kHz source material resampled to 48kHz with SoX. However, I keep and copy everything on my local storage at the original quality for convenience.
  19. Patrick Harper

    Cassettes Are Back, and It’s Not About the Music

    From 2012-2015 I was a total tapehead and amassed a decent selection of blanks with CD and vinyl dubs. Soon after I sold off nearly all of it, probably at a loss. My car still has a factory cassette player, my Fuji ZII's still sound transparent on it when I'm driving.
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