======================== unified (from filesystem) ========================
                                         'bitrate'  '164.578'
                                        'duration'  '259'
                                          'artist'  "Dan Ar Braz & l'hiritage des Celtes"
                                     'text_people'  ''
                                         'release'  'St. Patrick spirit'
                                           'title'  'Borders of salt'
                                           'quals'  ("['Q-HAP-3', 'Q-OLDST-3', 'Q-UNU-1', 'Q-JZFKS-1', 'Q-HHRNBTT-1', "
 "'Q-LOCALNESS-2', 'q-syn-2', 'q-bass-3', 'q-busy-3', 'q-grit-2', 'q-play-2', "
 "'q-chart-2', 'q-drums-2', 'q-other-3', 'q-piano-1', 'q-vocals-3', "
 "'q-mixbeat-1']")
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '2'
                                      'tracktotal'  '20'
                                            'date'  '1994'
                                        'comments'  ''
                                           'genre'  'loc-eur'
                                             'bpm'  '107.265'
                                             'key'  '6B'
                                        'acoustid'  ''
rest: ''

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

'COMM:ID3v1 Comment:XXX'                            '2B11BE14+340832+20+182+12420'
'COMM:iTunes_CDDB_1:eng'                            '2B11BE14+340832+20+182+12420+31875+50210+69450+99445+117447+130592+152847+168130+187385+201202+214717+229865+237365+269010+284622+293277+306912+327807'
'COMM:iTunes_CDDB_TrackNumber:eng'                  '2'
'TALB' (Album/Movie/Show title)                     'St. Patrick spirit'
'TBPM' (BPM (beats per minute))                     '107.265'
'TCON' (Content type, a.k.a. Genre)                 'loc-eur'
'TDRC' (Recording time)                             '1994'
'TENC' (Encoded by)                                 'iTunes X v2.0.4'
'TIT2' (Title/songname/content description)         'Borders of salt'
'TKEY' (Initial key)                                '6B'
'TPE1' (Lead performer(s)/Soloist(s))               "Dan Ar Braz & l'hiritage des Celtes"
'TRCK' (Track number/Position in set)               '2/20'
'TXXX:Q-HAP'                                        '3'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '1'
'TXXX:Q-LOCALNESS'                                  '2'
'TXXX:Q-OLDST'                                      '3'
'TXXX:Q-UNU'                                        '1'
'TXXX:q-bass'                                       '3'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '2'
'TXXX:q-drums'                                      '2'
'TXXX:q-grit'                                       '2'
'TXXX:q-mixbeat'                                    '1'
'TXXX:q-other'                                      '3'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '2'
'TXXX:q-syn'                                        '2'
'TXXX:q-vocals'                                     '3'
'TXXX:replaygain_track_gain'                        '-0.11 dB'
'TXXX:replaygain_track_peak'                        '0.429818'

========================== row from database ==========================
                                              'id'  1534550
                                            'path'  /data/Music/Bulk/00poprockelectronic/02 Borders of salt.mp3
                                         'working'  None
                                         'bitrate'  164
                                    'duration_sec'  259
                                           'genre'  loc-eur
                                        'filesize'  5340592
                                           'mtime'  1620534466
                                   'redo_metaread'  0
                                        'rest_str'   00poprockelectronic 02 loc eur
                                      'tag_artist'  Dan Ar Braz & l'hiritage des Celtes
                                     'tag_release'  St. Patrick spirit
                                       'tag_title'  Borders of salt
                                             'bpm'  107.265
                                    'search_title'  'borders':1 'of':2 'salt':3
                                   'search_artist'  'ar':2 'braz':3 'celtes':8 'dan':1 'des':7 'hiritage':5 'l':4 'lhiritage':6
                                  'search_release'  'patrick':3 'spirit':4 'st':1,2
                                     'search_rest'  '00poprockelectronic':1 'eur':3 'loc':2
                                    'search_combo'  '00poprockelectronic':16 'ar':5B 'borders':1A 'braz':6B 'celtes':11B 'dan':4B 'des':10B 'eur':18 'hiritage':8B 'l':7B 'lhiritage':9B 'loc':17 'of':2A 'patrick':14C 'salt':3A 'spirit':15C 'st':12C,13C
                                    'tag_tracknum'  2
                                      'num_images'  0
                                             'key'  6B
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-3', 'Q-LOCALNESS-2', 'q-piano-1', 'q-mixbeat-1', 'q-play-2', 'Q-OLDST-3', 'Q-UNU-1', 'Q-JZFKS-1', 'q-busy-3', 'q-drums-2', 'q-syn-2', 'q-chart-2', 'q-other-3', 'Q-HAP-3', 'q-bass-3', 'q-grit-2']
                                      'lastfmtags'  []
                                        'tag_date'  1994
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1620534465.5139623  (2021-05-09 06:27:45)
                             'size'  5340592