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

Original Article ↗ Hacker News Discussion ↗

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.