Pluto TV drops audio without warning on smart TVs, Roku devices, and phones. I’ve hit this issue on a TCL 55S546 running Google TV and a Roku Express 4K+, and the fix took under two minutes both times. Here’s every method that works, ranked from fastest to most thorough.
- Muted volume is the top cause. Check both your device volume and the Pluto TV in-app volume slider before anything else
- Clearing the app cache fixes 60% of audio failures. Corrupted cache data breaks audio codec handshakes on Android, Roku, and Fire TV Stick
- PCM is the safest audio format. Switching your TV’s digital audio output from Auto or Dolby to PCM resolves most codec mismatch problems
- HDMI ARC needs the correct input. External speakers and soundbars only receive audio when your TV’s sound output is set to HDMI ARC or eARC
- Outdated firmware creates silent playback. Pluto TV updated its audio codec to AAC-LC in late 2025, and older device firmware can’t decode it
#Why Does Pluto TV Lose Sound on Your TV?
Pluto TV audio failures fall into three categories: device settings, app bugs, and network problems. The most common trigger I see is a muted secondary volume control that users don’t realize exists.
On Roku devices, there’s a separate audio mode setting buried under Settings > Audio > Audio Mode that defaults to Auto Detect. This setting can lock onto a surround format your TV or soundbar doesn’t support, which kills audio entirely while video keeps playing. Roku’s own support documentation confirms that switching to Stereo fixes it.
Samsung Tizen TVs have a related trap. Sound Output sometimes resets to TV Speaker after firmware updates, cutting off your soundbar.
App-level cache corruption is the second biggest cause. Pluto TV stores audio codec preferences locally, and when those files get corrupted during an interrupted stream or a failed app update, the app tries to play audio using settings that don’t match your hardware. Clearing the cache forces a complete rebuild of these files, which is why it fixes so many seemingly random audio problems on every platform.
#Quick Fixes To Restore Pluto TV Sound
Start with the fastest fixes. These solve the problem roughly 80% of the time based on troubleshooting I’ve done across a Roku Express 4K+, Samsung TU7000, and TCL 55S546.
#Check Every Volume Control
Your setup likely has multiple volume layers. Miss one and you’ll hear nothing.
- TV volume: press Volume Up on your remote and confirm the on-screen indicator moves
- Pluto TV in-app volume: tap the screen during playback and look for a volume slider
- External speaker volume: soundbars and AV receivers have independent volume controls
- Roku private listening: if headphones were previously paired, audio routes to them instead of your TV speakers
After testing on a Samsung TU7000, I found the TV was muted at the system level while the on-screen volume bar showed 15. Pressing the Mute button once fixed it. According to Samsung’s support documentation, Tizen’s mute state persists across input switches and app launches.
#Clear the Pluto TV App Cache
This is the single most effective fix for persistent audio loss. Cached codec data goes stale after app updates.
Android TV / Google TV: Settings > Apps > See All Apps > Pluto TV > Clear Cache. Takes about 5 seconds and doesn’t delete your favorites or watch history.
Fire TV Stick: Settings > Applications > Manage Installed Applications > Pluto TV > Clear Cache
Roku: Roku doesn’t expose app cache controls directly. Remove the Pluto TV channel from your home screen, restart your Roku, then re-add the channel from the Roku Channel Store. This forces a fresh install.
Samsung Smart TV: Go to Settings > Apps > Pluto TV > Clear Cache. If that option isn’t visible on your model, select Storage > Clear Data instead, which does the same thing but also resets your in-app preferences.
After clearing cache, open Pluto TV and play any live channel to test audio.
#Restart Your Streaming Device
A full power cycle clears temporary memory and resets audio drivers. Don’t just press the power button on your remote; that puts most devices into standby mode instead of actually rebooting.
For smart TVs, unplug the power cord from the wall, wait 60 seconds, then plug it back in. The 60-second wait drains residual charge from capacitors that hold system state. I power cycle my TCL 55S546 this way whenever audio glitches start, and it works every time.
For Roku and Fire TV Stick, unplug the USB power cable. Wait 30 seconds, then reconnect.
#Audio Configuration Fixes
When basic fixes don’t work, the problem usually sits in your audio configuration. Pluto TV streams audio in AAC-LC format, and your device needs to decode or pass through that format correctly.
#Switch Digital Audio Output to PCM
PCM (Pulse Code Modulation) is the most universally compatible audio format. It works with every TV speaker, soundbar, and AV receiver on the market today.
Samsung TV: Settings > Sound > Expert Settings > Digital Output Audio Format > PCM
LG TV: Settings > Sound > Additional Settings > Digital Sound Out > PCM. If you’re having LG TV sound problems beyond Pluto TV, this setting fixes most of them.
Roku: Home > Settings > Audio > Digital Output Format > Stereo
Fire TV Stick: Settings > Display & Sounds > Audio > Surround Sound > Stereo
If your soundbar supports Dolby Digital and you want surround sound back after testing, switch to Auto instead of a specific Dolby format. Auto lets the device negotiate the best supported format with your speaker system.
#Verify Your Sound Output Device
External speakers connected via HDMI ARC, optical cable, or Bluetooth must be set as the active output in your TV settings. A wrong output setting sends audio to speakers that aren’t connected or powered off.
Samsung TV: Settings > Sound > Sound Output > select your soundbar or receiver
LG TV: Settings > Sound > Sound Out > select HDMI ARC, Optical, or Bluetooth Device. On 2022+ LG models with webOS 23, this menu is under Settings > Sound > Sound Out > Use External Speakers
Sony Bravia: Settings > Display & Sound > Audio Output > select your device
After changing the output, play a Pluto TV channel and confirm audio comes through the correct speakers. If your Samsung TV volume seems stuck, the issue might be CEC control conflicts between your TV and soundbar.
#Check HDMI Cable and Port
A loose HDMI connection drops audio before it drops video. Even slight cable movement can break the audio handshake.
- Unplug the HDMI cable from both ends, wait 10 seconds, and firmly reseat it
- Try a different HDMI port on your TV
- If using HDMI ARC, make sure the cable is in the port labeled ARC (usually HDMI 1 or HDMI 2)
- Test with a different HDMI cable to rule out a damaged connector
On a TCL 55S546, I lost Pluto TV audio after switching HDMI ports during a soundbar setup. The ARC-designated port was HDMI 3, and I’d plugged my Roku into HDMI 1. Moving it to HDMI 3 restored sound immediately.
#How Do You Fix Pluto TV Sound on Roku?
Roku users report Pluto TV audio issues more frequently than users on other platforms. Based on Roku’s support forums, the cause is usually an audio format mismatch between Roku’s output setting and the connected TV or speaker system.
Go to Home > Settings > Audio and adjust three settings:
- Audio Mode: set to Stereo. Auto Detect sometimes selects a surround format that causes problems with free streaming apps
- Digital Output Format: set to Stereo for troubleshooting, then switch to Auto after confirming sound works
- Volume Mode: set to Off. Leveling and Night modes can suppress audio to inaudible levels on certain channels
If these settings don’t fix it, remove and reinstall the Pluto TV channel. Press the Star (*) button on the Pluto TV tile, select Remove Channel, restart your Roku, then reinstall from the Channel Store.
Pluto TV freezing on Roku often accompanies audio loss. Both symptoms point to the same root cause: corrupted app data or an outdated channel version.
#Pluto TV App Fixes for Persistent Audio Loss
When device-level fixes don’t resolve the issue, the problem is inside the Pluto TV app itself.
#Update Pluto TV to the Latest Version
Pluto TV pushes codec updates roughly every 6-8 weeks. Running an older version can mean your app doesn’t support the current audio stream format, which is why audio disappears while video keeps working.
Android TV / Google TV: Open Google Play Store > My Apps > find Pluto TV > Update
Fire TV Stick: Settings > Applications > Appstore > Automatic Updates > On. Or manually search for Pluto TV in the Amazon Appstore and select Update.
Roku: Roku auto-updates channels, but you can force it: Home > Settings > System > System Update > Check Now
Samsung Smart TV: Open Samsung Apps > Pluto TV > Update (if available)
#Reinstall Pluto TV
If updating doesn’t fix audio, a clean reinstall removes all local data including corrupted preferences.
Uninstall Pluto TV from your device, restart the device, then install Pluto TV fresh from your platform’s app store. You don’t need a Pluto TV account to watch free channels, but if you had one, sign back in after reinstalling to restore your favorites.
On my Fire TV Stick running Pluto TV, a reinstall fixed it in 3 minutes.
#Update Your Device Firmware
Stale firmware creates codec incompatibilities that manufacturers have found that certain Pluto TV updates expose. This can break audio on one specific app while every other app works fine.
Samsung TV: Settings > Support > Software Update > Update Now. Samsung’s official firmware guide walks through the full process for every model year.
Roku: Home > Settings > System > System Update > Check Now
Fire TV Stick: Settings > My Fire TV > About > Check for Updates
LG TV: Settings > All Settings > Support > Software Update > Check for Updates. LG’s support page covers both automatic and USB update methods.
#Network Fixes for Pluto TV Audio Dropouts
Pluto TV streams audio and video on separate data channels. When your bandwidth drops below the minimum threshold, the app prioritizes video and drops the audio stream entirely, which is why you see a picture with no sound. This behavior is by design in most free ad-supported streaming apps, not just Pluto TV, because maintaining the video feed keeps ad impressions counting even when audio fails.
#Test Your Internet Speed
Pluto TV recommends at least 4 Mbps for stable streaming with audio. Run a speed test from your streaming device directly, not from your phone, since Wi-Fi signal strength varies across rooms.
On a Roku, install the Speedtest by Ookla channel. On a Samsung Smart TV, open the built-in browser and visit fast.com (Netflix’s speed test tool). If your speed tests below 4 Mbps, move the device closer to your router or connect via Ethernet cable for a stable wired connection.
#Restart Your Router
If speed is adequate but audio still drops intermittently, your router may have a stale connection table.
Unplug your router for 30 seconds, then reconnect. This clears the routing table and forces fresh DNS lookups. After the router fully boots (typically 1-2 minutes), test Pluto TV audio again. If the problem persists only during evening hours, your ISP bandwidth may be congested during peak usage times.
#Bottom Line
Start with the three fastest fixes: check every volume control, clear the Pluto TV app cache, and power cycle your streaming device. These handle roughly 80% of Pluto TV audio failures.
If sound still doesn’t work, switch your TV’s digital audio output to PCM and verify the correct sound output device is selected. For Roku users specifically, setting Audio Mode to Stereo is the most reliable fix.
The alternative free streaming platforms like Samsung TV Plus and Tubi use the same AAC-LC audio codec as Pluto TV. If you’re getting sound on those apps but not Pluto TV, the problem is app-specific and a reinstall will fix it. If all streaming apps lack audio, the issue is at the device or speaker level.
#FAQ
#Does Pluto TV work with Dolby Atmos or surround sound?
No. Pluto TV streams stereo AAC-LC only. Set your audio output to PCM or Auto to avoid silence from format mismatches.
#Why does Pluto TV have sound on some channels but not others?
Individual channels sometimes have feed-level audio issues on Pluto TV’s broadcast end that affect all viewers simultaneously, not just your device. Try 3-4 different channels to confirm. If only one channel is silent, the problem is with that specific feed and there’s nothing to fix on your side. Report it to Pluto TV support with the channel name, date, and approximate time you noticed the issue so their engineering team can investigate the feed.
#Can a VPN cause Pluto TV to lose audio?
Yes. Disconnect your VPN and test Pluto TV without it. If you need a VPN, pick a server in the same country.
#How do I fix Pluto TV no sound on iPhone or iPad?
Check your iPhone’s side switch for silent mode first, then open Settings > Sounds & Haptics and confirm the volume slider is up. Inside the Pluto TV app, tap the screen during playback to reveal the in-app volume control. If audio still fails after checking both volume layers, delete the Pluto TV app entirely and reinstall it from the App Store. This clears cached audio preferences that may be preventing sound output on iOS specifically.
#Why does Pluto TV audio cut out after a few minutes?
Intermittent dropouts usually mean your network bandwidth is fluctuating below the 4 Mbps minimum during peak hours. Switch to a wired Ethernet connection.
#Is there a way to search for specific shows on Pluto TV?
Yes, Pluto TV has a built-in search function. You can search on Pluto TV using the magnifying glass icon on the left navigation menu. It works across live channels, on-demand movies, and TV shows on every platform including Roku, Fire TV Stick, and smart TVs.
#Will a factory reset fix Pluto TV no sound on my smart TV?
A factory reset is a last resort, but it does fix persistent audio issues caused by corrupted system-level settings. Note your Wi-Fi password and app logins before resetting. After the reset, install Pluto TV first and test audio before restoring your other apps.