Soundflower配合QuickTime录屏无声音，如何检测其是否正常工作？

Hey there, let's work through this problem step by step—first we'll verify if Soundflower is functioning properly, then tackle the no-sound issue in QuickTime, especially considering your Apple display setup.

How to Test if Soundflower is Working Correctly #

These quick checks will help you confirm whether Soundflower is properly installed and capturing audio:

• Check System Sound Preferences:
  Open System Preferences > Sound. Go to the Input tab—you should see Soundflower (2ch) or Soundflower (64ch) listed. Select it, then play any audio on your computer (a local song, web video, etc.). If the input volume meter jumps as the audio plays, Soundflower is capturing sound correctly.
  Next, switch to the Output tab and check if Soundflower appears here too (this confirms the driver is loaded).
• QuickTime Audio Recording Test:
  Open QuickTime Player, go to File > New Audio Recording. Click the small arrow next to the record button, then select Soundflower (2ch) as the input source. Play some audio on your computer—if the volume meter in the recording window moves, hit record, wait a few seconds, then stop and play back the recording. If you hear the audio you played, Soundflower is working.
• Terminal Verification (Advanced):
  Open Terminal and run this command:

  system_profiler SPAudioDataType
  

  Look through the output for entries labeled Soundflower—if you see details about its channels and status, the driver is recognized by your system.

Fixing QuickTime Screen Recording No Sound (With Apple Display) #

Since you're using an Apple display, there are a few extra things to check beyond basic setup:

• Double-Check Multi-Output Device Configuration:
  Open Audio MIDI Setup (find it in Launchpad > Other). Locate your Multi-Output device—ensure it includes both Soundflower (2ch) and your Apple display's audio output (or your preferred speaker/headphone). Also, make sure this Multi-Output device is set as your default system output in System Sound Preferences.
• Confirm QuickTime's Screen Recording Settings:
  When starting a screen recording in QuickTime (File > New Screen Recording), click the arrow next to the record button. Under "Microphone", make sure you've selected Soundflower (2ch)—not your built-in mic or the Apple display's microphone.
• Resolve Apple Display Audio Conflict:
  Some Apple displays have built-in speakers that can interfere with audio routing to Soundflower. Try these steps:
  1. In System Sound Preferences, switch your output device directly to Soundflower (2ch), play a quick audio clip, then switch back to your Multi-Output device.
  2. In Audio MIDI Setup, right-click your Apple display's audio device and select "Use this device for sound output" temporarily, then switch back to Multi-Output. This can reset the audio routing.
  3. If the conflict persists, you can temporarily disable the display's audio device in Audio MIDI Setup (right-click > Disable) while recording, then re-enable it afterward.
• Refresh Soundflower & Multi-Output:
  Sometimes the driver or multi-output setup gets stuck. Try restarting your computer first—this often resolves driver loading issues. If that doesn't work, delete your existing Multi-Output device in Audio MIDI Setup, then create a new one by clicking the + button > Create Multi-Output Device, and re-add Soundflower and your display/speakers.
• Verify Soundflower Version Compatibility:
  Ensure you installed a version of Soundflower that's specifically compatible with El Capitan. Newer versions might not work with older macOS releases—if you downloaded a recent build, try finding an El Capitan-compatible version and reinstall it.

内容的提问来源于stack exchange，提问作者aaragon