diff --git a/src/shared/constants/modalityBridgeDefaults.ts b/src/shared/constants/modalityBridgeDefaults.ts
index 336d45b280..4fd98b9d61 100644
--- a/src/shared/constants/modalityBridgeDefaults.ts
+++ b/src/shared/constants/modalityBridgeDefaults.ts
@@ -34,6 +34,16 @@ export interface VisionBridgeRuntimeSettings {
   cacheMaxEntries: number;
 }
 
+export interface AudioBridgeRuntimeSettings {
+  enabled: boolean;
+  model: string;
+  timeoutMs: number;
+  maxClips: number;
+  cacheEnabled: boolean;
+  cacheTtlMinutes: number;
+  cacheMaxEntries: number;
+}
+
 // Typed candidate pickers: a stored value of the wrong type (e.g. the string
 // "off" in a boolean field) is skipped so the next candidate/default wins.
 function pickBoolean(...values: unknown[]): boolean | undefined {
@@ -83,3 +93,22 @@ export function resolveVisionBridgeRuntimeSettings(
       pickNumber(s.modalityBridgeCacheMaxEntries) ?? MODALITY_BRIDGE_DEFAULTS.cacheMaxEntries,
   };
 }
+
+/** Resolve persisted Audio Bridge settings with the shared PR-1 defaults. */
+export function resolveAudioBridgeRuntimeSettings(
+  settings: Record<string, unknown> | null | undefined
+): AudioBridgeRuntimeSettings {
+  const s = settings ?? {};
+  return {
+    enabled: pickBoolean(s.modalityBridgeAudioEnabled) ?? MODALITY_BRIDGE_DEFAULTS.audioEnabled,
+    model: pickString(s.modalityBridgeAudioModel) ?? MODALITY_BRIDGE_DEFAULTS.audioModel,
+    timeoutMs: pickNumber(s.modalityBridgeAudioTimeout) ?? MODALITY_BRIDGE_DEFAULTS.audioTimeoutMs,
+    maxClips: pickNumber(s.modalityBridgeAudioMaxClips) ?? MODALITY_BRIDGE_DEFAULTS.audioMaxClips,
+    cacheEnabled:
+      pickBoolean(s.modalityBridgeCacheEnabled) ?? MODALITY_BRIDGE_DEFAULTS.cacheEnabled,
+    cacheTtlMinutes:
+      pickNumber(s.modalityBridgeCacheTtlMinutes) ?? MODALITY_BRIDGE_DEFAULTS.cacheTtlMinutes,
+    cacheMaxEntries:
+      pickNumber(s.modalityBridgeCacheMaxEntries) ?? MODALITY_BRIDGE_DEFAULTS.cacheMaxEntries,
+  };
+}
diff --git a/tests/unit/audio-bridge-settings.test.ts b/tests/unit/audio-bridge-settings.test.ts
new file mode 100644
index 0000000000..3dcfe736cb
--- /dev/null
+++ b/tests/unit/audio-bridge-settings.test.ts
@@ -0,0 +1,56 @@
+import assert from "node:assert/strict";
+import test from "node:test";
+
+import {
+  MODALITY_BRIDGE_DEFAULTS,
+  resolveAudioBridgeRuntimeSettings,
+} from "../../src/shared/constants/modalityBridgeDefaults.ts";
+
+test("Audio Bridge runtime settings use the PR-1 defaults", () => {
+  assert.deepEqual(resolveAudioBridgeRuntimeSettings({}), {
+    enabled: MODALITY_BRIDGE_DEFAULTS.audioEnabled,
+    model: MODALITY_BRIDGE_DEFAULTS.audioModel,
+    timeoutMs: MODALITY_BRIDGE_DEFAULTS.audioTimeoutMs,
+    maxClips: MODALITY_BRIDGE_DEFAULTS.audioMaxClips,
+    cacheEnabled: MODALITY_BRIDGE_DEFAULTS.cacheEnabled,
+    cacheTtlMinutes: MODALITY_BRIDGE_DEFAULTS.cacheTtlMinutes,
+    cacheMaxEntries: MODALITY_BRIDGE_DEFAULTS.cacheMaxEntries,
+  });
+});
+
+test("Audio Bridge runtime settings accept typed persisted values", () => {
+  assert.deepEqual(
+    resolveAudioBridgeRuntimeSettings({
+      modalityBridgeAudioEnabled: false,
+      modalityBridgeAudioModel: "deepgram/nova-3",
+      modalityBridgeAudioTimeout: 12_000,
+      modalityBridgeAudioMaxClips: 2,
+      modalityBridgeCacheEnabled: false,
+      modalityBridgeCacheTtlMinutes: 5,
+      modalityBridgeCacheMaxEntries: 20,
+    }),
+    {
+      enabled: false,
+      model: "deepgram/nova-3",
+      timeoutMs: 12_000,
+      maxClips: 2,
+      cacheEnabled: false,
+      cacheTtlMinutes: 5,
+      cacheMaxEntries: 20,
+    }
+  );
+});
+
+test("Audio Bridge runtime settings ignore wrong-typed persisted values", () => {
+  const settings = resolveAudioBridgeRuntimeSettings({
+    modalityBridgeAudioEnabled: "false",
+    modalityBridgeAudioModel: 42,
+    modalityBridgeAudioTimeout: "12000",
+    modalityBridgeAudioMaxClips: null,
+  });
+
+  assert.equal(settings.enabled, MODALITY_BRIDGE_DEFAULTS.audioEnabled);
+  assert.equal(settings.model, MODALITY_BRIDGE_DEFAULTS.audioModel);
+  assert.equal(settings.timeoutMs, MODALITY_BRIDGE_DEFAULTS.audioTimeoutMs);
+  assert.equal(settings.maxClips, MODALITY_BRIDGE_DEFAULTS.audioMaxClips);
+});