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feat: preserve native HD rumble on Switch 2 controllers

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Joey Yakimowich-Payne 2026-09-07 08:19:53 -06:00
commit 006b573ee8
25 changed files with 1722 additions and 60 deletions
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17
ADAPTER_PARITY_PLAN.md
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@ -732,6 +732,23 @@ Set B delivery evidence:
qualification remain separate from those software results.
- Full operation and limitations: [README.md](README.md#switch-2-controller-input).
Switch 2 native HD output now preserves decoded stereo frequency/amplitude
and up to three subframes, using microphone-verified 10-bit frequency fields
and `0x50/0x60/0x70` sample-count headers. A 90-packet timing run measured
approximately 5.3 ms per frame; the sender guards 6/11/16 ms for complete
batches. Two bounded queue stages retain receipt timestamps; obsolete work
is counted and discarded rather than replayed or allowed to starve fresh work.
Keepalives/feedback resumption retain only the current final sample.
The final Pro-only native run sustained 512 changing one-subframe commands at
125.14 Hz with zero queue drops. Stereo/sweep/three-subframe patterns also
recorded zero drops. Deliberate three-subframe saturation at 125.11 Hz
discarded/superseded 69 output-stage commands out of 128 host updates and
recovered to a clean stop. No mixed-radio lossless claim is made.
Verification is now 289 passing tests and all five firmware builds; all
40 stored profiles and metadata survived. See the
[native HD contract and measurements](README.md#switch-2-native-hd-rumble).
### Native Switch-family HD rumble — Implemented, qualification incomplete
Standalone agent handoff: [SWITCH_FAMILY_HD_RUMBLE_PLAN.md](SWITCH_FAMILY_HD_RUMBLE_PLAN.md).