feat(calls): change noise suppression mid-call without rejoining

Changing Noise suppression (off / browser-native / ML), the ML model, the
gate or "stack browser NS" in Settings now applies to the call you're in.
useCallDenoise sends the fork's io.lotus.set_denoise whenever those
settings change; CallControl join-gates it like set_quality and re-sends
it after an EC reconnect (the remounted fork handler starts again from
the join URL). The "requires rejoining the call" note is replaced.

Bumps Element Call to 0.28.0-lotus.4, which adds io.lotus.set_denoise and
fixes mic re-captures silently keeping the old noiseSuppression (the mic
level meter's clone held the old track open), the meter following the
old device after a mic switch, and voiceIsolation staying on in off/ML
modes (element-call#66).

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_017PCb59uY3UKqDqt7B6hzd5

package-lock.json

@@ -81,7 +81,7 @@
       },
       "devDependencies": {
         "@axe-core/playwright": "4.13.0",
-        "@lotusguild/element-call-embedded": "0.28.0-lotus.3",
+        "@lotusguild/element-call-embedded": "0.28.0-lotus.4",
         "@playwright/test": "1.63.0",
         "@rollup/plugin-inject": "5.0.5",
         "@rollup/plugin-wasm": "6.2.2",
@@ -2695,9 +2695,9 @@
       "integrity": "sha512-dfLbk+PwWvFzSxwk3n5ySL0hfBog779o8h68wK/7/APo/7cgyWp5jcXockbxdk5kFRkbeXWm4Fbi9FrdN381sA=="
     },
     "node_modules/@lotusguild/element-call-embedded": {
-      "version": "0.28.0-lotus.3",
-      "resolved": "https://code.lotusguild.org/api/packages/LotusGuild/npm/%40lotusguild%2Felement-call-embedded/-/0.28.0-lotus.3/element-call-embedded-0.28.0-lotus.3.tgz",
-      "integrity": "sha512-CPXWXLCZkGMD8MFWgmerTb19UC1aj9QCD1PtSG8AO+IZvT1t1Md2hiCCu/EPDwRyYHBV54n5yWxQGg0hgLSteg==",
+      "version": "0.28.0-lotus.4",
+      "resolved": "https://code.lotusguild.org/api/packages/LotusGuild/npm/%40lotusguild%2Felement-call-embedded/-/0.28.0-lotus.4/element-call-embedded-0.28.0-lotus.4.tgz",
+      "integrity": "sha512-g+1mkdpGqUkE7JJo3b2G0XBiwDFwEedWul20hwD0iBpDyW67OafjbhrzRwfROY8Q9bx6BnulJHiR6Ll98KjguA==",
       "dev": true
     },
     "node_modules/@matrix-org/matrix-sdk-crypto-wasm": {

package.json

@@ -108,7 +108,7 @@
   },
   "devDependencies": {
     "@axe-core/playwright": "4.13.0",
-    "@lotusguild/element-call-embedded": "0.28.0-lotus.3",
+    "@lotusguild/element-call-embedded": "0.28.0-lotus.4",
     "@playwright/test": "1.63.0",
     "@rollup/plugin-inject": "5.0.5",
     "@rollup/plugin-wasm": "6.2.2",

src/app/components/CallEmbedProvider.tsx

@@ -60,6 +60,7 @@ import { SrOnly } from '../features/call-status/styles.css';
 import { useCallHotkeys } from '../hooks/useCallHotkeys';
 import { useAfkAutoMute } from '../hooks/useAfkAutoMute';
 import { useCallQuality } from '../hooks/useCallQuality';
+import { useCallDenoise } from '../hooks/useCallDenoise';
 import { useRemoteAllMuted } from '../hooks/useCallSpeakers';
 import { useRoomAvatar, useRoomName } from '../hooks/useRoomMeta';
 import { mDirectAtom } from '../state/mDirectList';
@@ -836,6 +837,7 @@ function CallUtils({ embed, joined }: { embed: CallEmbed; joined: boolean }) {
   useMutedTalkWarning(embed, joined);
   useCallThemeSync(embed);
   useCallQuality(embed);
+  useCallDenoise(embed);
   useCallHangupEvent(
     embed,
     useCallback(() => {

src/app/features/settings/general/General.tsx

@@ -2137,7 +2137,7 @@ export function Calls() {
                 </details>
 
                 <Text size="T200" priority="400">
-                  Note: Applying changes requires rejoining the call.
+                  Changes apply straight away, even during a call.
                 </Text>
               </Box>
 

src/app/hooks/useCallDenoise.ts

@@ -0,0 +1,41 @@
+import { useEffect } from 'react';
+import { useAtomValue } from 'jotai';
+import { CallEmbed } from '../plugins/call';
+import { settingsAtom } from '../state/settings';
+import { buildDenoisePayload } from '../utils/callDenoise';
+
+/**
+ * Apply noise-suppression setting changes to a call that's already running
+ * (the fork's `io.lotus.set_denoise`): switching between off, browser-native
+ * and an ML model, or between models, takes effect without rejoining. The join
+ * itself still carries the settings in the call URL, so the first send is a
+ * no-op fork-side.
+ */
+export function useCallDenoise(embed: CallEmbed): void {
+  const {
+    callNoiseSuppression,
+    callDenoiseModel,
+    callDenoiseNativeNS,
+    callDenoiseGate,
+    callDenoiseGateThreshold,
+  } = useAtomValue(settingsAtom);
+
+  useEffect(() => {
+    embed.control.setDenoise(
+      buildDenoisePayload({
+        callNoiseSuppression,
+        callDenoiseModel,
+        callDenoiseNativeNS,
+        callDenoiseGate,
+        callDenoiseGateThreshold,
+      }),
+    );
+  }, [
+    embed,
+    callNoiseSuppression,
+    callDenoiseModel,
+    callDenoiseNativeNS,
+    callDenoiseGate,
+    callDenoiseGateThreshold,
+  ]);
+}

src/app/plugins/call/CallControl.ts

@@ -4,6 +4,7 @@ import { CallControlState } from './CallControlState';
 import { ElementMediaStateDetail, ElementMediaStatePayload, ElementWidgetActions } from './types';
 import { canDelegateCapability } from './utils';
 import { CallErrorState, parseCallError } from './callError';
+import type { LotusDenoisePayload } from '../../utils/callDenoise';
 
 export enum CallControlEvent {
   StateUpdate = 'state_update',
@@ -106,6 +107,11 @@ export class CallControl extends EventEmitter implements CallControlState {
   // pre-join send pends to a 10s widget timeout, mirroring the deafen gate).
   private lastQuality: LotusQualityPayload | null = null;
 
+  // Last noise-suppression choice (io.lotus.set_denoise), held like
+  // lastQuality: sent once joined and re-sent after an EC reconnect, whose
+  // remounted handler starts again from the settings in the join URL.
+  private lastDenoise: LotusDenoisePayload | null = null;
+
   // C-M5: set true by CallControls while a push-to-talk key is held. A PTT hold
   // unmutes the mic transiently, and onMediaState() must NOT treat that as a
   // user-initiated unmute that auto-undeafens the user.
@@ -191,6 +197,7 @@ export class CallControl extends EventEmitter implements CallControlState {
     this.joined = true;
     this.sendDeafenState();
     this.sendQuality();
+    this.sendDenoise();
     this.sendHotkeyCodes();
     this.sendFrameScreenshareAllowed();
   }
@@ -204,6 +211,7 @@ export class CallControl extends EventEmitter implements CallControlState {
   public resendForkState(): void {
     this.sendDeafenState();
     this.sendQuality();
+    this.sendDenoise();
     if (this._audioOutputId !== undefined) this.sendAudioOutput(this._audioOutputId);
     // [Gitea #17] The pin lives fork-side and is dropped on a handler remount.
     if (this._focusedUserId !== null) this.sendFocus(this._focusedUserId, this._focusedMediaId);
@@ -762,6 +770,21 @@ export class CallControl extends EventEmitter implements CallControlState {
     this.call.transport.send('io.lotus.set_quality', this.lastQuality).catch(() => undefined);
   }
 
+  /**
+   * Switch noise suppression on the live mic (the fork's `io.lotus.set_denoise`):
+   * browser-native on/off and/or the ML model, without rejoining. Join-gated
+   * like setQuality().
+   */
+  public setDenoise(payload: LotusDenoisePayload): void {
+    this.lastDenoise = payload;
+    this.sendDenoise();
+  }
+
+  private sendDenoise(): void {
+    if (!this.joined || !this.lastDenoise) return;
+    this.call.transport.send('io.lotus.set_denoise', this.lastDenoise).catch(() => undefined);
+  }
+
   public dispose() {
     // [Gitea #56] Don't let a manual focus pin outlive the call.
     this.clearFocusParticipant();

src/app/utils/callDenoise.test.ts

@@ -0,0 +1,27 @@
+import { test } from 'node:test';
+import assert from 'node:assert/strict';
+
+import { buildDenoisePayload } from './callDenoise';
+
+test('buildDenoisePayload passes the settings through', () => {
+  assert.deepEqual(
+    buildDenoisePayload({
+      callNoiseSuppression: 'ml',
+      callDenoiseModel: 'dtln',
+      callDenoiseNativeNS: false,
+      callDenoiseGate: true,
+      callDenoiseGateThreshold: -50,
+    }),
+    { mode: 'ml', model: 'dtln', nativeNS: false, gate: true, gateThreshold: -50 },
+  );
+});
+
+test('buildDenoisePayload uses the same defaults as the join URL', () => {
+  assert.deepEqual(buildDenoisePayload({}), {
+    mode: 'browser',
+    model: 'rnnoise',
+    nativeNS: true,
+    gate: false,
+    gateThreshold: -45,
+  });
+});

src/app/utils/callDenoise.ts

@@ -0,0 +1,31 @@
+import { DenoiseModelId, NoiseSuppressionMode } from '../state/settings';
+
+/**
+ * Payload for the fork's `io.lotus.set_denoise` action, which switches noise
+ * suppression on the live mic mid-call (browser suppressor on/off and/or the
+ * ML model) instead of needing a rejoin.
+ */
+export type LotusDenoisePayload = {
+  mode: NoiseSuppressionMode;
+  model: DenoiseModelId;
+  nativeNS: boolean;
+  gate: boolean;
+  gateThreshold: number;
+};
+
+export type DenoiseSettings = {
+  callNoiseSuppression?: NoiseSuppressionMode;
+  callDenoiseModel?: DenoiseModelId;
+  callDenoiseNativeNS?: boolean;
+  callDenoiseGate?: boolean;
+  callDenoiseGateThreshold?: number;
+};
+
+/** Same defaults as the call URL built at join (useCallStart/createCallEmbed). */
+export const buildDenoisePayload = (s: DenoiseSettings): LotusDenoisePayload => ({
+  mode: s.callNoiseSuppression ?? 'browser',
+  model: s.callDenoiseModel ?? 'rnnoise',
+  nativeNS: s.callDenoiseNativeNS ?? true,
+  gate: s.callDenoiseGate ?? false,
+  gateThreshold: s.callDenoiseGateThreshold ?? -45,
+});