======================== unified (from filesystem) ========================
                                         'bitrate'  '128.0'
                                        'duration'  '369'
                                          'artist'  'BedYich Smetana'
                                     'text_people'  ''
                                         'release'  'Fallout 4 OST (Classic radio station)'
                                           'title'  'String Quartet No 12 E Flat-Major Op 127'
                                           'quals'  ("['Q-HAP-3', 'Q-UNU-1', 'Q-LOCALNESS-1', 'Q-JZFKS-1', 'Q-HHRNBTT-1', "
 "'Q-OLDST-1', 'q-syn-1', 'q-bass-1', 'q-busy-3', 'q-grit-2', 'q-play-3', "
 "'q-chart-3', 'q-drums-1', 'q-other-4', 'q-piano-1', 'q-vocals-1', "
 "'q-mixbeat-1']")
                                      'lastfmtags'  "['classical', 'romantic', 'czech', 'composer', 'opera']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '3'
                                      'tracktotal'  '29'
                                            'date'  ''
                                        'comments'  ''
                                           'genre'  'soundtrack-game'
                                             'bpm'  '143.721'
                                             'key'  '6A'
                                        'acoustid'  ''
rest: ''

======================== rawer (from filesystem) ========================

'TALB' (Album/Movie/Show title)                     'Fallout 4 OST (Classic radio station)'
'TBPM' (BPM (beats per minute))                     '143.721'
'TCON' (Content type, a.k.a. Genre)                 'soundtrack-game'
'TIT2' (Title/songname/content description)         'String Quartet No 12 E Flat-Major Op 127'
'TKEY' (Initial key)                                '6A'
'TPE1' (Lead performer(s)/Soloist(s))               'BedYich Smetana'
'TPE2' (Band/orchestra/accompaniment)               'Various Artists'
'TRCK' (Track number/Position in set)               '3/29'
'TSSE' (Software/Hardware and settings used for encoding)  'Lavf53.30.100'
'TXXX:Q-HAP'                                        '3'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '1'
'TXXX:Q-LOCALNESS'                                  '1'
'TXXX:Q-OLDST'                                      '1'
'TXXX:Q-UNU'                                        '1'
'TXXX:lastfmtags'                                   ['classical', 'romantic', 'czech', 'composer', 'opera']
'TXXX:q-bass'                                       '1'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '3'
'TXXX:q-drums'                                      '1'
'TXXX:q-grit'                                       '2'
'TXXX:q-mixbeat'                                    '1'
'TXXX:q-other'                                      '4'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '3'
'TXXX:q-syn'                                        '1'
'TXXX:q-vocals'                                     '1'
'TXXX:replaygain_track_gain'                        '+0.59 dB'
'TXXX:replaygain_track_peak'                        '0.537677'

========================== row from database ==========================
                                              'id'  739656
                                            'path'  /data/Music/Bulk/0soundtrack/Fallout 4 - Classical Radio/03. Bedřich Smetana - String Quartet No 12 E Flat-Major Op 127.mp3
                                         'working'  None
                                         'bitrate'  128
                                    'duration_sec'  369
                                           'genre'  soundtrack-game
                                        'filesize'  5910792
                                           'mtime'  1623433158
                                   'redo_metaread'  0
                                        'rest_str'   0soundtrack Classical Radio 03. Bedřich soundtrack game
                                      'tag_artist'  BedYich Smetana
                                     'tag_release'  Fallout 4 OST (Classic radio station)
                                       'tag_title'  String Quartet No 12 E Flat-Major Op 127
                                             'bpm'  143.721
                                    'search_title'  '127':9 'e':4 'flat':5 'flatmajor':7 'major':6 'no':3 'op':8 'quartet':2 'string':1
                                   'search_artist'  'bed':3 'bedyich':1 'smetana':2 'yich':4
                                  'search_release'  '4':2 'classic':4,5 'fallout':1 'ost':3 'radio':6 'station':7,8
                                     'search_rest'  '03':4,5 '0soundtrack':1 'bedrich':6,7 'classical':2 'game':9 'radio':3 'soundtrack':8
                                    'search_combo'  '03':25,26 '0soundtrack':22 '127':9A '4':15C 'bed':12B 'bedrich':27,28 'bedyich':10B 'classic':17C,18C 'classical':23 'e':4A 'fallout':14C 'flat':5A 'flatmajor':7A 'game':30 'major':6A 'no':3A 'op':8A 'ost':16C 'quartet':2A 'radio':19C,24 'smetana':11B 'soundtrack':29 'station':20C,21C 'string':1A 'yich':13B
                                    'tag_tracknum'  3
                                      'num_images'  0
                                             'key'  6A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-1', 'Q-LOCALNESS-1', 'q-piano-1', 'q-mixbeat-1', 'q-play-3', 'Q-OLDST-1', 'Q-UNU-1', 'Q-JZFKS-1', 'q-busy-3', 'q-drums-1', 'q-syn-1', 'q-chart-3', 'q-other-4', 'Q-HAP-3', 'q-bass-1', 'q-grit-2']
                                      'lastfmtags'  ['classical', 'romantic', 'czech', 'composer', 'opera']
                                        'tag_date'  
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1623433158.0536864  (2021-06-11 19:39:18)
                             'size'  5910792