======================== unified (from filesystem) ========================
                                         'bitrate'  '320.0'
                                        'duration'  '112'
                                          'artist'  'Klimperei'
                                     'text_people'  ''
                                         'release'  'Octogonale Imperative'
                                           'title'  "différentielle d'ordre 1"
                                           'quals'  ("['Q-HAP-3', 'Q-JZFKS-1', 'Q-OLDST-3', 'Q-HHRNBTT-1', 'Q-UNU-3', "
 "'Q-LOCALNESS-3', 'q-syn-2', 'q-bass-4', 'q-busy-3', 'q-grit-2', 'q-play-3', "
 "'q-chart-1', 'q-drums-2', 'q-other-4', 'q-piano-1', 'q-vocals-1', "
 "'q-mixbeat-1']")
                                      'lastfmtags'  "['toy pop', 'avant garde', 'french', 'experimental', 'art rock']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  ''
                                      'tracktotal'  ''
                                            'date'  '2010'
                                        'comments'  ''
                                           'genre'  'electronic-experimental'
                                             'bpm'  '127.8'
                                             'key'  '8A'
                                        'acoustid'  ''
rest: ''

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

'TALB' (Album/Movie/Show title)                     'Octogonale Imperative'
'TBPM' (BPM (beats per minute))                     '127.8'
'TCON' (Content type, a.k.a. Genre)                 'electronic-experimental'
'TDRC' (Recording time)                             '2010'
'TIT2' (Title/songname/content description)         "différentielle d'ordre 1"
'TKEY' (Initial key)                                '8A'
'TPE1' (Lead performer(s)/Soloist(s))               'Klimperei'
'TPE2' (Band/orchestra/accompaniment)               'Klimperei'
'TXXX:Q-HAP'                                        '3'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '1'
'TXXX:Q-LOCALNESS'                                  '3'
'TXXX:Q-OLDST'                                      '3'
'TXXX:Q-UNU'                                        '3'
'TXXX:lastfmtags'                                   ['toy pop', 'avant garde', 'french', 'experimental', 'art rock']
'TXXX:q-bass'                                       '4'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '1'
'TXXX:q-drums'                                      '2'
'TXXX:q-grit'                                       '2'
'TXXX:q-mixbeat'                                    '1'
'TXXX:q-other'                                      '4'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '3'
'TXXX:q-syn'                                        '2'
'TXXX:q-vocals'                                     '1'
'TXXX:replaygain_track_gain'                        '-0.37 dB'
'TXXX:replaygain_track_peak'                        '0.406555'
'TXXX:tracknum'                                     '04'

========================== row from database ==========================
                                              'id'  1507638
                                            'path'  /data/Music/Bulk/00exnnpjpsprgttidm/Klimperei - Octogonale Imperative/04 - différentielle d_ordre 1.mp3
                                         'working'  None
                                         'bitrate'  320
                                    'duration_sec'  112
                                           'genre'  electronic-experimental
                                        'filesize'  4502380
                                           'mtime'  1621628793
                                   'redo_metaread'  0
                                        'rest_str'   00exnnpjpsprgttidm 04 d_ordre electronic experimental
                                      'tag_artist'  Klimperei
                                     'tag_release'  Octogonale Imperative
                                       'tag_title'  différentielle d'ordre 1
                                             'bpm'  127.8
                                    'search_title'  '1':6 'd':3 'differentielle':1,2 'dordre':5 'ordre':4
                                   'search_artist'  'klimperei':1
                                  'search_release'  'imperative':2 'octogonale':1
                                     'search_rest'  'd':1 'electronic':3 'experimental':4 'ordre':2
                                    'search_combo'  '1':6A 'd':3A,10 'differentielle':1A,2A 'dordre':5A 'electronic':12 'experimental':13 'imperative':9C 'klimperei':7B 'octogonale':8C 'ordre':4A,11
                                    'tag_tracknum'  None
                                      'num_images'  0
                                             'key'  8A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-1', 'Q-LOCALNESS-3', 'q-piano-1', 'q-mixbeat-1', 'q-play-3', 'Q-OLDST-3', 'Q-UNU-3', 'Q-JZFKS-1', 'q-busy-3', 'q-drums-2', 'q-syn-2', 'q-chart-1', 'q-other-4', 'Q-HAP-3', 'q-bass-4', 'q-grit-2']
                                      'lastfmtags'  ['toy pop', 'avant garde', 'french', 'experimental', 'art rock']
                                        'tag_date'  2010
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1621628793.3070548  (2021-05-21 22:26:33)
                             'size'  4502380