diff --git a/stylesheets/_modules.scss b/stylesheets/_modules.scss
index b0b040bb5..b871c2f52 100644
--- a/stylesheets/_modules.scss
+++ b/stylesheets/_modules.scss
@@ -4136,6 +4136,12 @@ button.module-image__border-overlay:focus {
     flex: 1;
   }
 
+  &__direct-call-speaking-indicator {
+    position: absolute;
+    inset-inline-end: 16px;
+    bottom: 112px;
+  }
+
   &__participants {
     display: flex;
     flex: 1 1 0;
diff --git a/ts/components/CallManager.stories.tsx b/ts/components/CallManager.stories.tsx
index dfe10cec2..6b098a7f4 100644
--- a/ts/components/CallManager.stories.tsx
+++ b/ts/components/CallManager.stories.tsx
@@ -204,6 +204,7 @@ export function OngoingDirectCall(): JSX.Element {
           callMode: CallMode.Direct,
           callState: CallState.Accepted,
           peekedParticipants: [],
+          remoteAudioLevel: 0,
           remoteParticipants: [
             { hasRemoteVideo: true, presenting: false, title: 'Remy' },
           ],
@@ -291,6 +292,7 @@ export function CallRequestNeeded(): JSX.Element {
           callMode: CallMode.Direct,
           callState: CallState.Accepted,
           peekedParticipants: [],
+          remoteAudioLevel: 0,
           remoteParticipants: [
             { hasRemoteVideo: true, presenting: false, title: 'Mike' },
           ],
diff --git a/ts/components/CallScreen.stories.tsx b/ts/components/CallScreen.stories.tsx
index 5dfd66a46..692ee6e0d 100644
--- a/ts/components/CallScreen.stories.tsx
+++ b/ts/components/CallScreen.stories.tsx
@@ -84,6 +84,7 @@ const createActiveDirectCallProp = (
   conversation,
   callState: overrideProps.callState ?? CallState.Accepted,
   peekedParticipants: [] as [],
+  remoteAudioLevel: 0,
   remoteParticipants: [
     {
       hasRemoteVideo: overrideProps.hasRemoteVideo ?? false,
diff --git a/ts/components/CallScreen.tsx b/ts/components/CallScreen.tsx
index 335dc5858..03474ebd2 100644
--- a/ts/components/CallScreen.tsx
+++ b/ts/components/CallScreen.tsx
@@ -876,6 +876,15 @@ export function CallScreen({
           }
         />
       ) : null}
+      {activeCall.callMode === CallMode.Direct && (
+        <div className="module-ongoing-call__direct-call-speaking-indicator">
+          <CallingAudioIndicator
+            hasAudio
+            audioLevel={activeCall.remoteAudioLevel}
+            shouldShowSpeaking={activeCall.remoteAudioLevel > 0}
+          />
+        </div>
+      )}
       {/* We render the local preview first and set the footer flex direction to row-reverse
       to ensure the preview is visible at low viewport widths. */}
       <div className="module-ongoing-call__footer">
diff --git a/ts/components/CallingPip.stories.tsx b/ts/components/CallingPip.stories.tsx
index c8dc7fa75..227bed58d 100644
--- a/ts/components/CallingPip.stories.tsx
+++ b/ts/components/CallingPip.stories.tsx
@@ -61,6 +61,7 @@ const getDefaultCall = (overrides: Overrides): ActiveDirectCallType => {
     callMode: CallMode.Direct as CallMode.Direct,
     callState: CallState.Accepted,
     peekedParticipants: [],
+    remoteAudioLevel: 0,
     remoteParticipants: [
       { hasRemoteVideo: true, presenting: false, title: 'Arsene' },
     ],
diff --git a/ts/services/calling.ts b/ts/services/calling.ts
index 204b2038f..ba12b64ba 100644
--- a/ts/services/calling.ts
+++ b/ts/services/calling.ts
@@ -195,6 +195,7 @@ type CallingReduxInterface = Pick<
   | 'callStateChange'
   | 'cancelIncomingGroupCallRing'
   | 'cancelPresenting'
+  | 'directCallAudioLevelsChange'
   | 'groupCallAudioLevelsChange'
   | 'groupCallEnded'
   | 'groupCallRaisedHandsChange'
@@ -3038,7 +3039,8 @@ export class CallingClass {
   }
 
   #attachToCall(conversation: ConversationModel, call: Call): void {
-    this.#callsLookup[conversation.id] = call;
+    const conversationId = conversation.id;
+    this.#callsLookup[conversationId] = call;
 
     const reduxInterface = this.#reduxInterface;
     if (!reduxInterface) {
@@ -3056,7 +3058,7 @@ export class CallingClass {
       if (call.state === CallState.Ended) {
         this.#stopDeviceReselectionTimer();
         this.#lastMediaDeviceSettings = undefined;
-        delete this.#callsLookup[conversation.id];
+        delete this.#callsLookup[conversationId];
       }
 
       const localCallEvent = getLocalCallEventFromDirectCall(call);
@@ -3072,7 +3074,7 @@ export class CallingClass {
       }
 
       reduxInterface.callStateChange({
-        conversationId: conversation.id,
+        conversationId,
         callState: call.state,
         callEndedReason: call.endedReason,
         acceptedTime,
@@ -3087,7 +3089,7 @@ export class CallingClass {
     // eslint-disable-next-line no-param-reassign
     call.handleRemoteVideoEnabled = () => {
       reduxInterface.remoteVideoChange({
-        conversationId: conversation.id,
+        conversationId,
         hasVideo: call.remoteVideoEnabled,
       });
     };
@@ -3095,11 +3097,20 @@ export class CallingClass {
     // eslint-disable-next-line no-param-reassign
     call.handleRemoteSharingScreen = () => {
       reduxInterface.remoteSharingScreenChange({
-        conversationId: conversation.id,
+        conversationId,
         isSharingScreen: Boolean(call.remoteSharingScreen),
       });
     };
 
+    // eslint-disable-next-line no-param-reassign
+    call.handleAudioLevels = () => {
+      reduxInterface.directCallAudioLevelsChange({
+        conversationId,
+        localAudioLevel: call.outgoingAudioLevel,
+        remoteAudioLevel: call.remoteAudioLevel,
+      });
+    };
+
     // eslint-disable-next-line no-param-reassign
     call.handleLowBandwidthForVideo = _recovered => {
       // TODO: Implement handling of "low outgoing bandwidth for video" notification.
@@ -3284,8 +3295,7 @@ export class CallingClass {
       iceServers,
       hideIp: shouldRelayCalls || isContactUntrusted,
       dataMode: DataMode.Normal,
-      // TODO: DESKTOP-3101
-      // audioLevelsIntervalMillis: AUDIO_LEVEL_INTERVAL_MS,
+      audioLevelsIntervalMillis: AUDIO_LEVEL_INTERVAL_MS,
     };
 
     log.info('CallingClass.handleStartCall(): Proceeding');
diff --git a/ts/state/createStore.ts b/ts/state/createStore.ts
index 7480dbfc2..c49ce7612 100644
--- a/ts/state/createStore.ts
+++ b/ts/state/createStore.ts
@@ -47,6 +47,9 @@ const logger = createLogger({
     if (action.type === 'calling/GROUP_CALL_AUDIO_LEVELS_CHANGE') {
       return false;
     }
+    if (action.type === 'calling/DIRECT_CALL_AUDIO_LEVELS_CHANGE') {
+      return false;
+    }
     return true;
   },
 });
diff --git a/ts/state/ducks/calling.ts b/ts/state/ducks/calling.ts
index 14d22f442..9ef6c9072 100644
--- a/ts/state/ducks/calling.ts
+++ b/ts/state/ducks/calling.ts
@@ -148,6 +148,7 @@ export type DirectCallStateType = {
   isSharingScreen?: boolean;
   isVideoCall: boolean;
   hasRemoteVideo?: boolean;
+  remoteAudioLevel: number;
 };
 
 type GroupCallRingStateType = ReadonlyDeep<
@@ -624,6 +625,8 @@ const CHANGE_IO_DEVICE_FULFILLED = 'calling/CHANGE_IO_DEVICE_FULFILLED';
 const CLOSE_NEED_PERMISSION_SCREEN = 'calling/CLOSE_NEED_PERMISSION_SCREEN';
 const DECLINE_DIRECT_CALL = 'calling/DECLINE_DIRECT_CALL';
 const GROUP_CALL_AUDIO_LEVELS_CHANGE = 'calling/GROUP_CALL_AUDIO_LEVELS_CHANGE';
+const DIRECT_CALL_AUDIO_LEVELS_CHANGE =
+  'calling/DIRECT_CALL_AUDIO_LEVELS_CHANGE';
 const GROUP_CALL_ENDED = 'calling/GROUP_CALL_ENDED';
 const GROUP_CALL_RAISED_HANDS_CHANGE = 'calling/GROUP_CALL_RAISED_HANDS_CHANGE';
 const GROUP_CALL_STATE_CHANGE = 'calling/GROUP_CALL_STATE_CHANGE';
@@ -734,11 +737,19 @@ type GroupCallAudioLevelsChangeActionPayloadType = ReadonlyDeep<{
   localAudioLevel: number;
   remoteDeviceStates: ReadonlyArray<{ audioLevel: number; demuxId: number }>;
 }>;
-
 type GroupCallAudioLevelsChangeActionType = ReadonlyDeep<{
-  type: 'calling/GROUP_CALL_AUDIO_LEVELS_CHANGE';
+  type: typeof GROUP_CALL_AUDIO_LEVELS_CHANGE;
   payload: GroupCallAudioLevelsChangeActionPayloadType;
 }>;
+type DirectCallAudioLevelsChangeActionPayloadType = ReadonlyDeep<{
+  conversationId: string;
+  localAudioLevel: number;
+  remoteAudioLevel: number;
+}>;
+type DirectCallAudioLevelsChangeActionType = ReadonlyDeep<{
+  type: typeof DIRECT_CALL_AUDIO_LEVELS_CHANGE;
+  payload: DirectCallAudioLevelsChangeActionPayloadType;
+}>;
 
 type GroupCallEndedActionPayloadType = ReadonlyDeep<{
   conversationId: string;
@@ -959,6 +970,7 @@ export type CallingActionType =
   | CancelIncomingGroupCallRingActionType
   | ChangeCallViewActionType
   | DenyUserActionType
+  | DirectCallAudioLevelsChangeActionType
   | StartCallingLobbyActionType
   | StartCallLinkLobbyActionType
   | CallStateChangeFulfilledActionType
@@ -1205,6 +1217,12 @@ function callStateChange(
   };
 }
 
+function directCallAudioLevelsChange(
+  payload: DirectCallAudioLevelsChangeActionPayloadType
+): DirectCallAudioLevelsChangeActionType {
+  return { type: DIRECT_CALL_AUDIO_LEVELS_CHANGE, payload };
+}
+
 function changeIODevice(
   payload: ChangeIODevicePayloadType
 ): ThunkAction<
@@ -2693,6 +2711,7 @@ export const actions = {
   declineCall,
   deleteCallLink,
   denyUser,
+  directCallAudioLevelsChange,
   getPresentingSources,
   groupCallAudioLevelsChange,
   groupCallEnded,
@@ -2941,6 +2960,7 @@ export function reducer(
           conversationId,
           isIncoming: false,
           isVideoCall: action.payload.hasLocalVideo,
+          remoteAudioLevel: 0,
         };
         outgoingRing = true;
         newAdhocCalls = adhocCalls;
@@ -3066,6 +3086,7 @@ export function reducer(
           callState: CallState.Prering,
           isIncoming: false,
           isVideoCall: action.payload.hasLocalVideo,
+          remoteAudioLevel: 0,
         },
       },
       activeCallState: {
@@ -3225,6 +3246,7 @@ export function reducer(
           callState: CallState.Prering,
           isIncoming: true,
           isVideoCall: action.payload.isVideoCall,
+          remoteAudioLevel: 0,
         },
       },
     };
@@ -3307,6 +3329,7 @@ export function reducer(
           callState: CallState.Prering,
           isIncoming: false,
           isVideoCall: action.payload.hasLocalVideo,
+          remoteAudioLevel: 0,
         },
       },
       activeCallState: {
@@ -3392,17 +3415,29 @@ export function reducer(
 
   if (action.type === GROUP_CALL_AUDIO_LEVELS_CHANGE) {
     const { callMode, conversationId, remoteDeviceStates } = action.payload;
-
     const { activeCallState } = state;
-    const existingCall = getGroupCall(conversationId, state, callMode);
+
+    if (
+      activeCallState &&
+      (activeCallState.state === 'Waiting' ||
+        activeCallState.conversationId !== conversationId)
+    ) {
+      log.warn(
+        `${action.type}: Cannot update levels; activeCall doesn't match conversation`,
+        activeCallState
+      );
+      return state;
+    }
 
     // The PiP check is an optimization. We don't need to update audio levels if the user
     //   cannot see them.
+    const existingCall = getGroupCall(conversationId, state, callMode);
     if (
       !activeCallState ||
-      activeCallState.state === 'Waiting' ||
       activeCallState.pip ||
-      !existingCall
+      !existingCall ||
+      (existingCall.callMode !== CallMode.Adhoc &&
+        existingCall.callMode !== CallMode.Group)
     ) {
       return state;
     }
@@ -3445,6 +3480,49 @@ export function reducer(
     };
   }
 
+  if (action.type === DIRECT_CALL_AUDIO_LEVELS_CHANGE) {
+    const { conversationId } = action.payload;
+    const { activeCallState } = state;
+    const existingCall = getOwn(state.callsByConversation, conversationId);
+
+    if (
+      activeCallState &&
+      (activeCallState.state === 'Waiting' ||
+        activeCallState.conversationId !== conversationId)
+    ) {
+      log.warn(
+        `${action.type}: Cannot update levels; activeCall doesn't match conversation`,
+        activeCallState
+      );
+      return state;
+    }
+
+    // The PiP check is an optimization. We don't need to update audio levels if the user
+    //   cannot see them.
+    if (
+      !activeCallState ||
+      activeCallState.pip ||
+      !existingCall ||
+      existingCall.callMode !== CallMode.Direct
+    ) {
+      return state;
+    }
+
+    const localAudioLevel = truncateAudioLevel(action.payload.localAudioLevel);
+    const remoteAudioLevel = truncateAudioLevel(
+      action.payload.remoteAudioLevel
+    );
+
+    return {
+      ...state,
+      activeCallState: { ...activeCallState, localAudioLevel },
+      callsByConversation: {
+        ...state.callsByConversation,
+        [conversationId]: { ...existingCall, remoteAudioLevel },
+      },
+    };
+  }
+
   if (action.type === GROUP_CALL_STATE_CHANGE) {
     const {
       callMode,
diff --git a/ts/state/smart/CallManager.tsx b/ts/state/smart/CallManager.tsx
index 794addce7..c7160c138 100644
--- a/ts/state/smart/CallManager.tsx
+++ b/ts/state/smart/CallManager.tsx
@@ -204,6 +204,7 @@ const mapStateToActiveCallProp = (
         callMode: CallMode.Direct,
         callState: call.callState,
         peekedParticipants: [],
+        remoteAudioLevel: call.remoteAudioLevel,
         remoteParticipants: [
           {
             hasRemoteVideo: Boolean(call.hasRemoteVideo),
diff --git a/ts/test-electron/state/ducks/calling_test.ts b/ts/test-electron/state/ducks/calling_test.ts
index 7caf96b00..4b37cbad0 100644
--- a/ts/test-electron/state/ducks/calling_test.ts
+++ b/ts/test-electron/state/ducks/calling_test.ts
@@ -66,6 +66,7 @@ describe('calling duck', () => {
     isIncoming: false,
     isVideoCall: false,
     hasRemoteVideo: false,
+    remoteAudioLevel: 0,
   };
   const stateWithDirectCall: CallingStateType = {
     ...getEmptyState(),
@@ -102,6 +103,7 @@ describe('calling duck', () => {
         isIncoming: true,
         isVideoCall: false,
         hasRemoteVideo: false,
+        remoteAudioLevel: 0,
       } satisfies DirectCallStateType,
     },
   };
@@ -2296,6 +2298,7 @@ describe('calling duck', () => {
             conversationId: 'fake-conversation-id',
             isIncoming: false,
             isVideoCall: true,
+            remoteAudioLevel: 0,
           });
           assert.deepEqual(result.activeCallState, {
             state: 'Active',
@@ -2694,6 +2697,7 @@ describe('calling duck', () => {
           callState: CallState.Prering,
           isIncoming: false,
           isVideoCall: false,
+          remoteAudioLevel: 0,
         });
         assert.deepEqual(result.activeCallState, {
           state: 'Active',
@@ -2934,6 +2938,7 @@ describe('calling duck', () => {
           isIncoming: false,
           isVideoCall: false,
           hasRemoteVideo: false,
+          remoteAudioLevel: 0,
         });
       });
     });
diff --git a/ts/test-electron/state/selectors/calling_test.ts b/ts/test-electron/state/selectors/calling_test.ts
index ba73c5ecc..a649445e7 100644
--- a/ts/test-electron/state/selectors/calling_test.ts
+++ b/ts/test-electron/state/selectors/calling_test.ts
@@ -60,6 +60,7 @@ describe('state/selectors/calling', () => {
         isIncoming: false,
         isVideoCall: false,
         hasRemoteVideo: false,
+        remoteAudioLevel: 0,
       },
     },
   };
@@ -89,6 +90,7 @@ describe('state/selectors/calling', () => {
     isIncoming: true,
     isVideoCall: false,
     hasRemoteVideo: false,
+    remoteAudioLevel: 0,
   };
 
   const stateWithIncomingDirectCall: CallingStateType = {
@@ -151,6 +153,7 @@ describe('state/selectors/calling', () => {
             isIncoming: false,
             isVideoCall: false,
             hasRemoteVideo: false,
+            remoteAudioLevel: 0,
           },
         }
       );
@@ -176,6 +179,7 @@ describe('state/selectors/calling', () => {
           isIncoming: false,
           isVideoCall: false,
           hasRemoteVideo: false,
+          remoteAudioLevel: 0,
         }
       );
     });
diff --git a/ts/types/Calling.ts b/ts/types/Calling.ts
index acd247def..f979e84d1 100644
--- a/ts/types/Calling.ts
+++ b/ts/types/Calling.ts
@@ -78,6 +78,7 @@ export type ActiveDirectCallType = ActiveCallBaseType & {
       serviceId?: ServiceIdString;
     },
   ];
+  remoteAudioLevel: number;
 };
 
 export type ActiveGroupCallType = ActiveCallBaseType & {