diff --git a/crates/punktfunk-host/src/audio/windows/minted.rs b/crates/punktfunk-host/src/audio/windows/minted.rs
index 1fa2a82f..e837b432 100644
--- a/crates/punktfunk-host/src/audio/windows/minted.rs
+++ b/crates/punktfunk-host/src/audio/windows/minted.rs
@@ -318,19 +318,21 @@ const WFX_F32_2CH_48K: [u8; 40] = [
     0x03, 0x00, 0x00, 0x00, 0x00, 0x00, 0x10, 0x00, 0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b,
     0x71, // KSDATAFORMAT_SUBTYPE_IEEE_FLOAT
 ];
-/// The capture pin's one format: 1 ch / 48 kHz / 32-bit float, mask 0x4 (FRONT_CENTER).
-const WFX_F32_1CH_48K: [u8; 40] = [
+/// The PCM16 leg of the stereo set — the pad program's measured coherence rule: the DEVICE
+/// format is 16-bit PCM, the mix/host formats float (a float device-format was part of the
+/// incoherent sets that made endpoints unopenable).
+const WFX_PCM16_2CH_48K: [u8; 40] = [
     0xfe, 0xff, // wFormatTag = WAVE_FORMAT_EXTENSIBLE
-    0x01, 0x00, // nChannels = 1
+    0x02, 0x00, // nChannels = 2
     0x80, 0xbb, 0x00, 0x00, // nSamplesPerSec = 48000
     0x00, 0xee, 0x02, 0x00, // nAvgBytesPerSec = 192000
     0x04, 0x00, // nBlockAlign = 4
-    0x20, 0x00, // wBitsPerSample = 32
+    0x10, 0x00, // wBitsPerSample = 16
     0x16, 0x00, // cbSize = 22
-    0x20, 0x00, // wValidBitsPerSample = 32
-    0x04, 0x00, 0x00, 0x00, // dwChannelMask = SPEAKER_FRONT_CENTER
-    0x03, 0x00, 0x00, 0x00, 0x00, 0x00, 0x10, 0x00, 0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b,
-    0x71, // KSDATAFORMAT_SUBTYPE_IEEE_FLOAT
+    0x10, 0x00, // wValidBitsPerSample = 16
+    0x03, 0x00, 0x00, 0x00, // dwChannelMask = FL | FR
+    0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x10, 0x00, 0x80, 0x00, 0x00, 0xaa, 0x00, 0x38, 0x9b,
+    0x71, // KSDATAFORMAT_SUBTYPE_PCM
 ];
 
 /// Best-effort: write the role's display name — plus, on the mic RENDER, the mono format set —
@@ -349,37 +351,36 @@ fn stamp_identity(endpoint_id: &str, role: Role, capture: bool) {
             value: pe::StampValue::Str("Punktfunk"),
         },
     ];
-    // Format stamps pin each mic-pair side to ITS pin's one supported format — measured: the
-    // render pin is stereo-only and the capture pin mono-only (stamping either differently
-    // makes the endpoint unopenable, 0x88890008 on every Initialize). These stamps exist to
-    // HEAL endpoints an earlier build of this branch mis-stamped, and to keep the pair pinned
-    // against drift; they cannot fix the raw crossing (see [`minted_ids`]).
+    // The mic pair gets ONE coherent stereo format set on BOTH endpoints, in the exact
+    // PCM16-device/float-mix split the pad program's stamp bisect proved the driver accepts
+    // (its first "unopenable endpoint" and "format can't be changed" verdicts were both
+    // incoherent-stamp artifacts — this branch re-derived the same false verdicts before the
+    // pad recipe was re-applied). Both sides identical: the driver moves one stream between
+    // the two endpoints, and the octave-low voice was the two sides DISAGREEING (stereo
+    // render default vs mono capture default). `capture` steers nothing today — kept so a
+    // per-direction split stays one edit away.
+    let _ = capture;
     if role == Role::Mic {
-        let wfx: &'static [u8; 40] = if capture {
-            &WFX_F32_1CH_48K
-        } else {
-            &WFX_F32_2CH_48K
-        };
         stamps.extend([
             pe::Stamp {
                 label: "device-format",
                 key: pe::PKEY_DEVICE_FORMAT,
-                value: pe::StampValue::Format(wfx),
+                value: pe::StampValue::Format(&WFX_PCM16_2CH_48K),
             },
             pe::Stamp {
                 label: "mix-format-2",
                 key: pe::PKEY_MIX_FORMAT_2,
-                value: pe::StampValue::Format(wfx),
+                value: pe::StampValue::Format(&WFX_F32_2CH_48K),
             },
             pe::Stamp {
                 label: "mix-format-3",
                 key: pe::PKEY_MIX_FORMAT_3,
-                value: pe::StampValue::Format(wfx),
+                value: pe::StampValue::Format(&WFX_F32_2CH_48K),
             },
             pe::Stamp {
                 label: "host-format",
                 key: pe::PKEY_HOST_FORMAT,
-                value: pe::StampValue::Format(wfx),
+                value: pe::StampValue::Format(&WFX_F32_2CH_48K),
             },
         ]);
     }