diff --git a/custom/basic-call/components/Call/Container.js b/custom/basic-call/components/Call/Container.js
index 22e0d08..5e9cb68 100644
--- a/custom/basic-call/components/Call/Container.js
+++ b/custom/basic-call/components/Call/Container.js
@@ -2,7 +2,7 @@ import React, { useMemo } from 'react';
 import { Audio } from '@custom/shared/components/Audio';
 import { BasicTray } from '@custom/shared/components/Tray';
 import { useParticipants } from '@custom/shared/contexts/ParticipantsProvider';
-import useJoinSound from '@custom/shared/hooks/useJoinSound';
+import { useJoinSound } from '@custom/shared/hooks/useJoinSound';
 import PropTypes from 'prop-types';
 import { WaitingRoom } from './WaitingRoom';
 
diff --git a/custom/shared/components/Tile/Tile.js b/custom/shared/components/Tile/Tile.js
index a65b0f4..b6d28bd 100644
--- a/custom/shared/components/Tile/Tile.js
+++ b/custom/shared/components/Tile/Tile.js
@@ -1,5 +1,5 @@
 import React, { memo, useEffect, useState, useRef } from 'react';
-import useVideoTrack from '@custom/shared/hooks/useVideoTrack';
+import { useVideoTrack } from '@custom/shared/hooks/useVideoTrack';
 import { ReactComponent as IconMicMute } from '@custom/shared/icons/mic-off-sm.svg';
 import classNames from 'classnames';
 import PropTypes from 'prop-types';
@@ -21,7 +21,7 @@ export const Tile = memo(
     onVideoResize,
     ...props
   }) => {
-    const videoTrack = useVideoTrack(participant);
+    const videoTrack = useVideoTrack(participant.id);
     const videoRef = useRef(null);
     const tileRef = useRef(null);
     const [tileWidth, setTileWidth] = useState(0);
diff --git a/custom/shared/components/Tray/TrayMicButton.js b/custom/shared/components/Tray/TrayMicButton.js
index f88a476..878c52a 100644
--- a/custom/shared/components/Tray/TrayMicButton.js
+++ b/custom/shared/components/Tray/TrayMicButton.js
@@ -1,14 +1,11 @@
 import React from 'react';
 import { TrayButton } from '@custom/shared/components/Tray';
-import { useAudioLevel } from '@custom/shared/hooks/useAudioLevel';
 import { ReactComponent as IconMicOff } from '@custom/shared/icons/mic-off-md.svg';
 import { ReactComponent as IconMicOn } from '@custom/shared/icons/mic-on-md.svg';
 
 import PropTypes from 'prop-types';
 
 export const TrayMicButton = ({ isMuted, onClick }) => {
-  const audioLevel = useAudioLevel('local');
-
   return (
     <TrayButton label="Mic" onClick={onClick} orange={isMuted}>
       {isMuted ? <IconMicOff /> : <IconMicOn />}
diff --git a/custom/shared/contexts/CallProvider.js b/custom/shared/contexts/CallProvider.js
index db5febb..763e836 100644
--- a/custom/shared/contexts/CallProvider.js
+++ b/custom/shared/contexts/CallProvider.js
@@ -37,6 +37,7 @@ export const CallProvider = ({
   const router = useRouter();
   const [roomInfo, setRoomInfo] = useState(null);
   const [enableScreenShare, setEnableScreenShare] = useState(false);
+  const [enableJoinSound, setEnableJoinSound] = useState(true);
   const [videoQuality, setVideoQuality] = useState(VIDEO_QUALITY_AUTO);
   const [showLocalVideo, setShowLocalVideo] = useState(true);
   const [preJoinNonAuthorized, setPreJoinNonAuthorized] = useState(false);
@@ -144,6 +145,7 @@ export const CallProvider = ({
         roomExp,
         enableRecording,
         enableScreenShare,
+        enableJoinSound,
         videoQuality,
         setVideoQuality,
         roomInfo,
@@ -154,6 +156,7 @@ export const CallProvider = ({
         setEnableScreenShare,
         startCloudRecording,
         subscribeToTracksAutomatically,
+        setEnableJoinSound
       }}
     >
       {children}
diff --git a/custom/shared/contexts/useCallMachine.js b/custom/shared/contexts/useCallMachine.js
index f691796..2d693c9 100644
--- a/custom/shared/contexts/useCallMachine.js
+++ b/custom/shared/contexts/useCallMachine.js
@@ -78,10 +78,16 @@ export const useCallMachine = ({
   const join = useCallback(
     async (callObject) => {
       setState(CALL_STATE_JOINING);
+
+      // Force mute clients when joining a call with experimental_optimize_large_calls enabled.
+      if (room?.config?.experimental_optimize_large_calls) {
+        callObject.setLocalAudio(false);
+      }
+
       await callObject.join({ subscribeToTracksAutomatically, token, url });
       setState(CALL_STATE_JOINED);
     },
-    [token, subscribeToTracksAutomatically, url]
+    [room, token, subscribeToTracksAutomatically, url]
   );
 
   /**
diff --git a/custom/shared/hooks/useActiveSpeaker.js b/custom/shared/hooks/useActiveSpeaker.js
index c6e0a21..f8f6449 100644
--- a/custom/shared/hooks/useActiveSpeaker.js
+++ b/custom/shared/hooks/useActiveSpeaker.js
@@ -6,12 +6,12 @@ import { useParticipants } from '../contexts/ParticipantsProvider';
  * (= the current one and only actively speaking person)
  */
 export const useActiveSpeaker = () => {
-  const { showLocalVideo } = useCallState();
+  const { broadcastRole, showLocalVideo } = useCallState();
   const { activeParticipant, localParticipant, participantCount } =
     useParticipants();
 
   // we don't show active speaker indicators EVER in a 1:1 call or when the user is alone in-call
-  if (participantCount <= 2) return null;
+  if (broadcastRole !== 'attendee' && participantCount <= 2) return null;
 
   if (!activeParticipant?.isMicMuted) {
     return activeParticipant?.id;
diff --git a/custom/shared/hooks/useAudioLevel.js b/custom/shared/hooks/useAudioLevel.js
index dc8a193..184f17a 100644
--- a/custom/shared/hooks/useAudioLevel.js
+++ b/custom/shared/hooks/useAudioLevel.js
@@ -1,36 +1,54 @@
 import { useEffect, useState } from 'react';
+import getConfig from 'next/config';
 
-export const useAudioLevel = (sessionId) => {
-  const [audioLevel, setAudioLevel] = useState(0);
+export const useAudioLevel = (stream) => {
+  const [micVolume, setMicVolume] = useState(0);
+  const { assetPrefix } = getConfig().publicRuntimeConfig;
 
   useEffect(() => {
-    if (!sessionId) {
-      return false;
+    if (!stream) {
+      setMicVolume(0);
+      return;
     }
+    const AudioCtx =
+      typeof AudioContext !== 'undefined'
+        ? AudioContext
+        : typeof webkitAudioContext !== 'undefined'
+          ? webkitAudioContext
+          : null;
+    if (!AudioCtx) return;
+    const audioContext = new AudioCtx();
+    const mediaStreamSource = audioContext.createMediaStreamSource(stream);
+    let node;
 
-    const i = setInterval(async () => {
+    const startProcessing = async () => {
       try {
-        if (!(window.rtcpeers && window.rtcpeers.sfu)) {
-          return;
-        }
-        const consumer =
-          window.rtcpeers.sfu.consumers[`${sessionId}/cam-audio`];
-        if (!(consumer && consumer.getStats)) {
-          return;
-        }
-        const level = Array.from((await consumer.getStats()).values()).find(
-          (s) => 'audioLevel' in s
-        ).audioLevel;
-        setAudioLevel(level);
-      } catch (e) {
-        console.error(e);
-      }
-    }, 2000);
+        await audioContext.audioWorklet.addModule(
+          `${assetPrefix}/audiolevel-processor.js`
+        );
 
-    return () => clearInterval(i);
-  }, [sessionId]);
+        node = new AudioWorkletNode(audioContext, 'audiolevel');
 
-  return audioLevel;
-};
+        node.port.onmessage = (event) => {
+          let volume = 0;
+          if (event.data.volume) volume = event.data.volume;
+          if (!node) return;
+          setMicVolume(volume);
+        };
 
-export default useAudioLevel;
+        mediaStreamSource.connect(node).connect(audioContext.destination);
+      } catch {}
+    };
+
+    startProcessing();
+
+    return () => {
+      node?.disconnect();
+      node = null;
+      mediaStreamSource?.disconnect();
+      audioContext?.close();
+    };
+  }, [assetPrefix, stream]);
+
+  return micVolume;
+};
\ No newline at end of file
diff --git a/custom/shared/hooks/useAudioTrack.js b/custom/shared/hooks/useAudioTrack.js
index 58d37ea..df64fde 100644
--- a/custom/shared/hooks/useAudioTrack.js
+++ b/custom/shared/hooks/useAudioTrack.js
@@ -2,14 +2,13 @@ import { useDeepCompareMemo } from 'use-deep-compare';
 
 import { useTracks } from '../contexts/TracksProvider';
 
-export const useAudioTrack = (participant) => {
+export const useAudioTrack = (id) => {
   const { audioTracks } = useTracks();
 
   return useDeepCompareMemo(() => {
-    const audioTrack = audioTracks?.[participant?.id];
-    // @ts-ignore
+    const audioTrack = audioTracks?.[id];
     return audioTrack?.persistentTrack;
-  }, [participant?.id, audioTracks]);
+  }, [id, audioTracks]);
 };
 
-export default useAudioTrack;
+export default useAudioTrack;
\ No newline at end of file
diff --git a/custom/shared/hooks/useCamSubscriptions.js b/custom/shared/hooks/useCamSubscriptions.js
index 0cee45a..c5e3384 100644
--- a/custom/shared/hooks/useCamSubscriptions.js
+++ b/custom/shared/hooks/useCamSubscriptions.js
@@ -15,12 +15,10 @@ export const useCamSubscriptions = (
   const { updateCamSubscriptions } = useTracks();
 
   useDeepCompareEffect(() => {
-    if (!subscribedIds || !stagedIds) return false;
+    if (!subscribedIds || !stagedIds) return;
     const timeout = setTimeout(() => {
       updateCamSubscriptions(subscribedIds, stagedIds);
     }, throttle);
     return () => clearTimeout(timeout);
   }, [subscribedIds, stagedIds, throttle, updateCamSubscriptions]);
-};
-
-export default useCamSubscriptions;
+};
\ No newline at end of file
diff --git a/custom/shared/hooks/useJoinSound.js b/custom/shared/hooks/useJoinSound.js
index bbf8566..97a45ca 100644
--- a/custom/shared/hooks/useJoinSound.js
+++ b/custom/shared/hooks/useJoinSound.js
@@ -1,39 +1,42 @@
-import { useEffect, useMemo } from 'react';
+import { useEffect, useState } from 'react';
 
-import { debounce } from 'debounce';
 import { useCallState } from '../contexts/CallProvider';
-import { useSound } from './useSound';
+import { useSoundLoader } from './useSoundLoader';
 
 /**
- * Convenience hook to play `join.mp3` when participants join the call
+ * Convenience hook to play `join.mp3` when first other participants joins.
  */
 export const useJoinSound = () => {
-  const { callObject } = useCallState();
-  const { load, play } = useSound('assets/join.mp3');
+  const { callObject: daily } = useCallState();
+  const { joinSound } = useSoundLoader();
+  const [playJoinSound, setPlayJoinSound] = useState(false);
 
   useEffect(() => {
-    load();
-  }, [load]);
-
-  const debouncedPlay = useMemo(() => debounce(() => play(), 200), [play]);
-
-  useEffect(() => {
-    if (!callObject) return false;
-
-    const handleParticipantJoined = () => {
-      debouncedPlay();
-    };
-
-    callObject.on('participant-joined', handleParticipantJoined);
-
+    if (!daily) return;
+    /**
+     * We don't want to immediately play a joined sound, when the user joins the meeting:
+     * Upon joining all other participants, that were already in-call, will emit a
+     * participant-joined event.
+     * In waiting 2 seconds we make sure, that the sound is only played when the user
+     * is **really** the first participant.
+     */
     setTimeout(() => {
-      handleParticipantJoined();
+      setPlayJoinSound(true);
     }, 2000);
+  }, [daily]);
 
-    return () => {
-      callObject.off('participant-joined', handleParticipantJoined);
+  useEffect(() => {
+    if (!daily) return;
+    const handleParticipantJoined = () => {
+      // first other participant joined --> play sound
+      if (!playJoinSound || Object.keys(daily.participants()).length !== 2)
+        return;
+      joinSound.play();
     };
-  }, [callObject, debouncedPlay]);
-};
 
-export default useJoinSound;
+    daily.on('participant-joined', handleParticipantJoined);
+    return () => {
+      daily.off('participant-joined', handleParticipantJoined);
+    };
+  }, [daily, joinSound, playJoinSound]);
+};
\ No newline at end of file
diff --git a/custom/shared/hooks/useNetworkState.js b/custom/shared/hooks/useNetworkState.js
index d0397bd..16a739f 100644
--- a/custom/shared/hooks/useNetworkState.js
+++ b/custom/shared/hooks/useNetworkState.js
@@ -1,4 +1,3 @@
-/* global rtcpeers */
 import { useCallback, useEffect, useState } from 'react';
 
 import {
@@ -21,10 +20,10 @@ export const useNetworkState = (
 
   const setQuality = useCallback(
     (q) => {
-      if (!callObject || typeof rtcpeers === 'undefined') return;
+      if (!callObject) return;
 
       const peers = Object.keys(callObject.participants()).length - 1;
-      const isSFU = rtcpeers?.currentlyPreferred?.typeName?.() === 'sfu';
+      const isSFU = callObject.getNetworkTopology().topology === 'sfu';
 
       const lowKbs = isSFU
         ? STANDARD_LOW_BITRATE_CAP
diff --git a/custom/shared/hooks/useSound.js b/custom/shared/hooks/useSound.js
index d8d2195..fa988bb 100644
--- a/custom/shared/hooks/useSound.js
+++ b/custom/shared/hooks/useSound.js
@@ -1,6 +1,8 @@
 import { useCallback, useEffect, useRef } from 'react';
 
-export const useSound = (src) => {
+const defaultNotMuted = () => false;
+
+export const useSound = (src, isMuted = defaultNotMuted) => {
   const audio = useRef(null);
 
   useEffect(() => {
@@ -22,17 +24,15 @@ export const useSound = (src) => {
     audio.current.load();
   }, [audio]);
 
-  const play = useCallback(() => {
-    if (!audio.current) return;
+  const play = useCallback(async () => {
+    if (!audio.current || isMuted()) return;
     try {
       audio.current.currentTime = 0;
-      audio.current.play();
+      await audio.current.play();
     } catch (e) {
       console.error(e);
     }
-  }, [audio]);
+  }, [audio, isMuted]);
 
   return { load, play };
-};
-
-export default useSound;
+};
\ No newline at end of file
diff --git a/custom/shared/hooks/useSoundLoader.js b/custom/shared/hooks/useSoundLoader.js
new file mode 100644
index 0000000..eb3eb07
--- /dev/null
+++ b/custom/shared/hooks/useSoundLoader.js
@@ -0,0 +1,24 @@
+import { useCallback, useMemo } from 'react';
+
+import { useCallState } from '../contexts/CallProvider';
+import { useSound } from './useSound';
+
+export const useSoundLoader = () => {
+  const { enableJoinSound } = useCallState();
+
+  const isJoinSoundMuted = useCallback(
+    () => !enableJoinSound,
+    [enableJoinSound]
+  );
+
+  const joinSound = useSound(`assets/join.mp3`, isJoinSoundMuted);
+
+  const load = useCallback(() => {
+    joinSound.load();
+  }, [joinSound]);
+
+  return useMemo(
+    () => ({ joinSound, load }),
+    [joinSound, load]
+  );
+};
\ No newline at end of file
diff --git a/custom/shared/hooks/useVideoTrack.js b/custom/shared/hooks/useVideoTrack.js
index 0b2129f..5b2c5ff 100644
--- a/custom/shared/hooks/useVideoTrack.js
+++ b/custom/shared/hooks/useVideoTrack.js
@@ -1,22 +1,28 @@
 import { useDeepCompareMemo } from 'use-deep-compare';
-import { useTracks } from '../contexts/TracksProvider';
-import { DEVICE_STATE_BLOCKED, DEVICE_STATE_OFF } from '../contexts/useDevices';
 
-export const useVideoTrack = (participant) => {
+import { useTracks } from '../contexts/TracksProvider';
+import { isLocalId, isScreenId } from '../contexts/participantsState';
+
+export const useVideoTrack = (id) => {
   const { videoTracks } = useTracks();
 
+  const videoTrack = useDeepCompareMemo(
+    () => videoTracks?.[id],
+    [id, videoTracks]
+  );
+
+  /**
+   * MediaStreamTrack's are difficult to compare.
+   * Changes to a video track's id will likely need to be reflected in the UI / DOM.
+   * This usually happens on P2P / SFU switches.
+   */
   return useDeepCompareMemo(() => {
-    const videoTrack = videoTracks?.[participant?.id];
     if (
-      videoTrack?.state === DEVICE_STATE_OFF ||
-      videoTrack?.state === DEVICE_STATE_BLOCKED ||
-      (!videoTrack?.subscribed &&
-        participant?.id !== 'local' &&
-        !participant.isScreenshare)
+      videoTrack?.state === 'off' ||
+      videoTrack?.state === 'blocked' ||
+      (!videoTrack?.subscribed && !isLocalId(id) && !isScreenId(id))
     )
       return null;
     return videoTrack?.persistentTrack;
-  }, [participant?.id, videoTracks]);
-};
-
-export default useVideoTrack;
+  }, [id, videoTrack]);
+};
\ No newline at end of file