ffmpeg -i track.flac Look for: Stream #0:0: Audio: flac, 44100 Hz, stereo, s16 (or s32 for 24-bit)
Format : FLAC Bit depth : 16 bits Sampling rate : 44.1 kHz Encoding : lossless Audio Analysis Unit Date: [Current date] For: Quality assurance / archival purposes
Or use mediainfo :