This is to reproduce a bug where audio recording (from microhpone) does not work on PyQT 6.7.0, MacOS, arm64 chip, Python 3.9

mictest.py

# When running this with PySide 6.4.2 on Mac ARM64 chip Python 3.9, recording audio works
# When upgrading PySide to 6.7.0 (keeping everything else constant), recording fails

import sys
from PySide6.QtWidgets import (QApplication, QMainWindow, QPushButton)
from PySide6.QtMultimedia import (QMediaCaptureSession, QAudioInput, QMediaRecorder)

class MicTest(QMainWindow):
    def __init__(self):
        super().__init__()
        self.recording = False
        self.setWindowTitle("Mic Test")

        # Make a start button
        self.startButton = QPushButton("Record")
        self.setCentralWidget(self.startButton)
        self.startButton.clicked.connect(self.recordClicked)

        # Make an audio input
        self.m_audio = QAudioInput()

        # Make a media recorder
        self.m_mediaRecorder = QMediaRecorder()
        self.m_mediaRecorder.setOutputLocation("mictest")

        # Setup capture session
        self.m_captureSession = QMediaCaptureSession()
        self.m_captureSession.setAudioInput(self.m_audio)
        self.m_captureSession.setRecorder(self.m_mediaRecorder)

    # Record button clicked
    def recordClicked(self):
        if not self.recording:
            self.m_mediaRecorder.record()
        else:
            self.m_mediaRecorder.stop()
        self.recording = not self.recording

if __name__ == "__main__":
    app = QApplication(sys.argv)
    m = MicTest()
    m.show()
    sys.exit(app.exec())

requirements_failing.txt

PySide6==6.7.0
PySide6_Addons==6.7.0
PySide6_Essentials==6.7.0
shiboken6==6.7.0

requirements_working.txt

PySide6==6.4.2
PySide6-Addons==6.4.2
PySide6-Essentials==6.4.2
shiboken6==6.4.2

Setup:

python3.9 -m venv ".venv"
source ./.venv/bin/activate
pip install -r requirements_failing.txt
python mictest.py

Then play the resulting mictest.ma4 file