Microphone potentially inoperative on Zoom and Discord webapp calls.

[scuba-tech]

Description

Microphone input not working on Zoom or Discord, verified 2x on both macOS (12.1) and Manjaro KDE (v.latest)

Steps to Reproduce

1. Verify any microphone is connected
2. Verify alsa route (KDE) or Privacy access (macOS) is set up properly
3. Attempt to join any Discord VC, or Zoom meeting
4. Confirm microphone and camera access (yes, "Always")
5. Receive error banner "... not detecting an input from your mic. Let's fix that!"
6. Verify that the proper input source is displayed in Discord/Zoom settings, and is not muted
7. Using the "Test" feature in Discord, verify that an echo is heard, yet the webapp shows no audio bars.
8. Using the "Test meeting" feature in Zoom, verify that no audio indicator (bouncing microphone icon) is seen, and that camera does not work.
9. Toggle "Shields down" and attempt again. Observe that Discord now works occasionally, and that Zoom continues to not function.

Actual result:

No microphone/audio input to Discord and Zoom calls is possible on either macOS and KDE.

Expected result:

Usable microphone functionality to make voice calls in Discord and Zoom webapps via Brave.

Reproduces how often:

Reproducible every time.

Brave version (brave://version info)

Brave	1.33.106 Chromium: 96.0.4664.110 (Official Build) unknown (64-bit)
Revision	d5ef0e8214bc14c9b5bbf69a1515e431394c62a6-refs/branch-heads/4664@{#1283}
OS	Linux
JavaScript	V8 9.6.180.21
User Agent	Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/96.0.4664.110 Safari/537.36
Command Line	/usr/lib/brave-browser/brave --enable-crashpad --disable-client-side-phishing-detection --disable-domain-reliability --enable-dom-distiller --no-pings --component-updater=url-source=https://go-updater.brave.com/extensions --origin-trial-public-key=bYUKPJoPnCxeNvu72j4EmPuK7tr1PAC7SHh8ld9Mw3E=,fMS4mpO6buLQ/QMd+zJmxzty/VQ6B1EUZqoCU04zoRU= --sync-url=https://sync-v2.brave.com/v2 --lso-url=https://no-thanks.invalid --variations-server-url=https://variations.brave.com/seed --enable-features=LegacyTLSEnforced,PrefetchPrivacyChanges,SafetyTip,AutoupgradeMixedContent,WebUIDarkMode,PasswordImport,ReducedReferrerGranularity --disable-features=InterestCohortAPIOriginTrial,AppDiscoveryRemoteUrlSearch,AdInterestGroupAPI,ComputePressure,LiveCaption,AutofillEnableAccountWalletStorage,FlocIdComputedEventLogging,HandwritingRecognitionWebPlatformApiFinch,ConversionMeasurement,InterestGroupStorage,SignedExchangeSubresourcePrefetch,NavigatorPluginsFixed,Parakeet,WebSQLInThirdPartyContextEnabled,TabGroupsFeedback,AutofillServerCommunication,SpeculationRulesPrefetchProxy,Prerender2,InterestCohortFeaturePolicy,ReportAllJavaScriptFrameworks,FirstPartySets,TextFragmentAnchor,ReadLater,CopyLinkToText,TrustTokens,DirectSockets,IdleDetection,SubresourceWebBundles,NetworkTimeServiceQuerying,WebOTP,NotificationTriggers,FederatedLearningOfCohorts,Fledge --flag-switches-begin --flag-switches-end
Executable Path	/usr/lib/brave-browser/brave
Profile Path	/home/user/.config/BraveSoftware/Brave-Browser/Default
Variations	ExtendedVariationsSafeMode2:SignalAndWriteViaFileUtil

Version/Channel Information:

I'm only using the default/main channel, as-installed from the Brave website and/or Pamac.

• Can you reproduce this issue with the current release?
• • Yes
• Can you reproduce this issue with the beta channel?
• • Have not attempted.
• Can you reproduce this issue with the nightly channel?
• • Have not attempted.

Other Additional Information:

• Does the issue resolve itself when disabling Brave Shields?
• • No
• Does the issue resolve itself when disabling Brave Rewards?
• • Brave rewards have never been enabled.
• Is the issue reproducible on the latest version of Chrome?
• • Microphone works on Google Chrome with same settings.

Miscellaneous Information:

Sound manager on KDE shows that the audio routing is making it to the browser (I see moving VU bars, etc). Additionally, the browser permissions for the websites are all set to "Allow" with shields down.
When trying another browser, e.g. Firefox or Safari, all microphone features do work immediately.

When toggling "shields down", Discord audio does occasionally work.

[scuba-tech]

Just a brief update to confirm that on the same machines with the same audio settings, microphone input does immediately work when switching to Firefox and Chromium.

(I've triple-checked that the audio permissions are set the same for all three browsers, "Allow - Always" and have also restarted the browsers and then rebooted, before conducting the above tests.)

[LiftedStarfish]

I appear to be having the same issue. I was trying to record for Common Voice, and it said that it could not detect any microphone. I'm using ALSA and PipeWire.