buildbot/chromium.webrtc/Win7 Tester started failing 4 manual tests related to audio:

First failed build:
https://ci.chromium.org/buildbot/chromium.webrtc/Win7%20Tester/43391

4 tests failed:
    WebRtcAudioQualityBrowserTest.MANUAL_TestAutoGainControlOnLowAudio (../../chrome/browser/media/webrtc/webrtc_audio_quality_browsertest.cc:836)
../../chrome/browser/media/webrtc/webrtc_audio_quality_browsertest.cc(351): error: Expected equality of these values:
  ref_segments.size()
    Which is: 6
  actual_segments.size()
    Which is: 1
The recording did not result in the same number of audio segments after on splitting on silence; WebRTC must have deformed the audio too much.

    WebRtcAudioQualityBrowserTest.MANUAL_TestAutoGainIsOffWithAudioProcessingOff (../../chrome/browser/media/webrtc/webrtc_audio_quality_browsertest.cc:847)
../../chrome/browser/media/webrtc/webrtc_audio_quality_browsertest.cc(351): error: Expected equality of these values:
  ref_segments.size()
    Which is: 6
  actual_segments.size()
    Which is: 1
The recording did not result in the same number of audio segments after on splitting on silence; WebRTC must have deformed the audio too much.

    WebRtcAudioQualityBrowserTest.MANUAL_TestCallQualityWithAudioFromFakeDevice (../../chrome/browser/media/webrtc/webrtc_audio_quality_browsertest.cc:712)
../../chrome/browser/media/webrtc/webrtc_audio_quality_browsertest.cc(404): error: Value of: succeeded
  Actual: false
Expected: true
Failed to run PESQ.

    WebRtcAudioQualityBrowserTest.MANUAL_TestCallQualityWithAudioFromWebAudio (../../chrome/browser/media/webrtc/webrtc_audio_quality_browsertest.cc:718)
[3436:5788:0607/215340.440:ERROR:webrtc_audio_quality_browsertest.cc(470)] PESQ was not able to compute a score; we probably recorded only silence.
../../chrome/browser/media/webrtc/webrtc_audio_quality_browsertest.cc(404): error: Value of: succeeded
  Actual: false
Expected: true
Failed to run PESQ.