Using a versatile Blu-ray Audio Ripper such as VideoByte BD-DVD Ripper, you only need 3 steps to rip Blu-ray Audio to FLAC:
Step 1. Insert the Blu-ray disc to your PC and load the disc under a stable network connection.
Step 2. Customize the snippet or choose the entire Blu-ray disc.
Step 3. Choose FLAC as the output format and click “Rip All”.