Dossier — HiBy FC5
The brochure speaks; the silicon answers. What follows is what each has said.
+ Vendor page › +Claims breakdown
| Claim | Bucket | Witnessed | Verdict |
|---|---|---|---|
| PCM 32-bit / 384 kHz | PCM | Alt 1, Subslot 4 — 32-bit PCM. Sample Rates Supported (kHz): 44.1 48 88.2 96 176.4 192 352.8 384Alt 2, Subslot 3 — 24-bit PCM. Sample Rates Supported (kHz): 44.1 48 88.2 96 176.4 192 352.8 384Alt 3, Subslot 2 — 16-bit PCM. Sample Rates Supported (kHz): 44.1 48 88.2 96 176.4 192 352.8 384 | ✓ Match |
| DSD128 via DoP | Silent | DSD is delivered via the DSD-over-PCM (DoP) transport, which rides on PCM alts at marker rates (176.4 kHz for DSD64, 352.8 kHz for DSD128). The descriptor cannot witness DoP capability as a distinct alt. | — Silent: claims unwitnessable by descriptor |
| MQA 4× rendering | Silent | MQA is a licensed software render riding PCM frames; the USB descriptor witnesses only format, depth, and rate, and cannot see it. | — Silent: claims unwitnessable by descriptor |
Remarks
The base FC5 shares a USB identity with its display-bearing sibling, yet the descriptor sets the two apart: where the display unit reaches 32-bit / 768 kHz and native DSD, the base unit witnesses PCM to 32-bit / 384 kHz with no raw DSD alt.
HiBy specs DSD128 over DoP, and the descriptor agrees by what it does not show — DSD rides the PCM alts at the DoP marker rates rather than a native stream. The 4× MQA unfold is a software render the descriptor cannot see. On PCM, brochure and silicon meet at 32/384.
+ See the full Concordance +