24-bit/192kHz music downloads and why they make no sense (2012)

Original Article ↗ Hacker News Discussion ↗

Audiophile marketing around 24‑bit/192 kHz “high‑res” music is challenged by engineers who argue that 16‑bit/44.1 kHz already exceeds human hearing needs for playback, and that higher specs mainly benefit recording, mixing, and DSP processing stages. Many commenters attribute perceived improvements in high‑res releases to better mastering, different source material, or placebo rather than extra bits and samples, while others stress edge cases like extreme dynamic range, time‑stretching, and archival flexibility. Overall, the exchange contrasts measurable limits of hearing and converter technology with subjective listening experiences, highlighting how easily people misattribute audible differences to file formats instead of mastering, equipment, or room acoustics.

Scope of 24‑bit / 192 kHz vs 16‑bit / 44.1 kHz

  • Many commenters agree: for distribution to human listeners, 16‑bit / 44.1 or 48 kHz is already transparent if done well.
  • Higher sample rates are seen as useful mainly in production: mixing, mastering, DSP, time‑stretching, pitch‑shifting, and sound design (e.g., slowing audio, film FX).
  • Several note that 192 kHz specifically is overkill; 88.2/96 kHz is usually enough even in pro workflows.

Bit Depth, Dynamic Range, and Recording

  • 24‑bit and 32‑bit float are praised for recording and post:
    • Huge headroom; easier gain staging; reduced risk of clipping.
    • Particularly useful in field/film recording and high‑dynamic‑range material (classical, jazz, FX).
  • Others point out practical converter limits: typical ADC/DACs deliver ~18–22 “real” bits; thermal/Brownian noise dominates beyond that.

Sample Rate, Aliasing, and Filters

  • Nyquist–Shannon is repeatedly invoked: 44.1 kHz covers the audible band, but:
    • Real‑world anti‑alias/anti‑imaging filters are imperfect; steep 20–22 kHz filtering can introduce artifacts.
    • Oversampling (internally or by using higher project rates) makes filter design easier and aliasing less problematic.
  • Debate persists over whether aliasing and filter artifacts at 44.1 kHz are audibly detectable in double‑blind tests.

Audiophilia, Placebo, and Blind Testing

  • Strong skepticism toward “audiophile” claims about cables, memory layout, file rates, etc.; many label them placebo or outright scams.
  • Others admit they enjoy “overkill” (hi‑res, exotic gear) for peace of mind, collecting, or aesthetic reasons, regardless of audible benefit.
  • ABX tools and double‑blind tests are repeatedly recommended; several report being surprised how hard it is to distinguish lossless from good lossy encodes.

Real‑World Factors: Gear, Room, Ears

  • Many emphasize that speakers/headphones, room treatment, and mix/mastering quality matter far more than bit depth or extreme sample rates.
  • Hearing ability varies widely; aging and noise exposure limit high‑frequency sensitivity, often well below 20 kHz.

Archival, Workflow, and Creative Use

  • Hi‑res files are valued for:
    • Archival “master” copies that can be safely downsampled/re‑encoded later.
    • DJing, sampling, and heavy DSP where inaudible content may be shifted into the audible band.
  • Multiple comments note that audible differences between “CD” and “hi‑res” releases often come from different masters, not the container format itself.