WASAPI Driver for ASIO 0.9.13

0.9.13 (changes from 0.9.12) - "Capture gate"; one period per period

Block AB on 0.9.12 (2026-10-25, Steinberg UR22mkII, Yamaha Steinberg USB
Driver, Windows 11 x64, Cubase 15, 44.1 kHz): Shared 256 and 512 clean
(KI-11 confirmed fixed); Exclusive 256 still dropped (427 drops, 13
discontinuities): with that driver every drain, 172 per second at the
output's rhythm, found a full 441-frame packet, 1.73 times real time, and
the capture event did not mark real periods either. Only the stream's
clock told the truth. The output path is unchanged.
Summary of all changes:

• KI-13 FIXED (to be confirmed by block AB on real hardware) - the CAPTURE
  GATE. An Exclusive capture is drained only when the capture stream's own
  IAudioClock says a whole new period exists since the frames already
  accepted, and never more than that: exactly one period per period,
  whatever the driver reports and however often the audio thread asks
  (ARCHITECTURE.txt section 65). Without a usable clock (missing,
  failing, frozen for 20 drains) the gate runs on the system timer for the
  rest of the run. Shared and loopback sources are not gated (the Windows
  engine reports its packets correctly).
• Exclusive capture period: the smallest multiple of the device's default
  period that is >= HALF the ASIO buffer (0.9.12: the whole buffer). 512
  at 44.1 kHz: 441 frames, reported input latency about 41 ms (0.9.12:
  882 frames, 63 ms); 1024: 882.
• Status: the Capture line ends with ", gated N" (drains refused by the
  gate); Stats trace event: CaptureGated, CaptureClockFallback (27
  fields). Log: "capture gate on the stream clock (frequency F)" at open,
  "stop: input capture gate: pulls=N gated=M clock=device|qpc" at stop.
• Documents: KNOWN-ISSUES.txt KI-11 (confirmed), KI-13 (0.9.12 results,
  0.9.13 fix), two observations for 0.9.14 (output glitches counted at an
  engine restart; plain FIFO backlog); ARCHITECTURE.txt sections 64, 65;
  CODE-REVIEW.txt "0.9.13"; TEST-GUIDE.txt block AB (0.9.12 results, AB7
  for 0.9.13); ROADMAP.txt.
• Independent review of 0.9.13: 2 HIGH, 3 MED, 4 LOW, all fixed
  (CODE-REVIEW.txt): gate decision before reading, timer credit paid back,
  clock base armed at Start, backwards / unbounded positions handled,
  refused drains counted as pulls.
• Version number: getDriverVersion() returns 9130.
  Not changed: the output path, the Shared capture path, the converters,
  the installer logic, the trace provider, the panel apart from the status
  text.

This package contains WasapiDriverARM64X.dll (Setup and bin.zip): on Windows on Arm the Setup registers it once for native ARM64 and emulated x64 hosts. Not yet tested on real Windows on Arm hardware (KNOWN-ISSUES.txt KI-9).