If you are looking for the episodes themselves in the highest possible quality, the Blu-ray.com listings show that the North American Season 4 release actually uses , which is technically a lossy format.
Season 4 is available in 1080p High Definition on Blu-ray, utilizing the MPEG-4 AVC codec. This provides a clean transfer free of the "blocky" artifacts often found in lower-bitrate streams. murdoch mysteries season 04 lossless
If your goal is to hear Robert Carli's score in lossless quality, you have much better options. While streaming services like Spotify provide standard quality, you can purchase "Studio Master" versions of the music: If you are looking for the episodes themselves