======================== unified (from filesystem) ========================
                                         'bitrate'  '320.0'
                                        'duration'  '138'
                                          'artist'  'Yan Tregger'
                                     'text_people'  ''
                                         'release'  ''
                                           'title'  'driver'
                                           'quals'  ("['Q-HAP-3', 'Q-JZFKS-1', 'Q-OLDST-3', 'Q-HHRNBTT-1', 'Q-UNU-4', "
 "'Q-LOCALNESS-3', 'q-syn-2', 'q-bass-1', 'q-busy-3', 'q-grit-2', 'q-play-3', "
 "'q-chart-1', 'q-drums-4', 'q-other-3', 'q-piano-1', 'q-vocals-1', "
 "'q-mixbeat-1']")
                                      'lastfmtags'  "['pop', 'funk', 'soul', 'french', 'rock']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  'a6'
                                      'tracktotal'  ''
                                            'date'  '2000'
                                        'comments'  ''
                                           'genre'  'electronic-experimental-oddness'
                                             'bpm'  '123.36'
                                             'key'  '8A'
                                        'acoustid'  ''
rest: ''

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

'TBPM' (BPM (beats per minute))                     '123.36'
'TCON' (Content type, a.k.a. Genre)                 'electronic-experimental-oddness'
'TDRC' (Recording time)                             '2000'
'TIT2' (Title/songname/content description)         'driver'
'TKEY' (Initial key)                                '8A'
'TPE1' (Lead performer(s)/Soloist(s))               'Yan Tregger'
'TRCK' (Track number/Position in set)               'a6'
'TXXX:Q-HAP'                                        '3'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '1'
'TXXX:Q-LOCALNESS'                                  '3'
'TXXX:Q-OLDST'                                      '3'
'TXXX:Q-UNU'                                        '4'
'TXXX:lastfmtags'                                   ['pop', 'funk', 'soul', 'french', 'rock']
'TXXX:q-bass'                                       '1'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '1'
'TXXX:q-drums'                                      '4'
'TXXX:q-grit'                                       '2'
'TXXX:q-mixbeat'                                    '1'
'TXXX:q-other'                                      '3'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '3'
'TXXX:q-syn'                                        '2'
'TXXX:q-vocals'                                     '1'
'TXXX:replaygain_track_gain'                        '-0.50 dB'
'TXXX:replaygain_track_peak'                        '0.737386'

========================== row from database ==========================
                                              'id'  284566
                                            'path'  /data/Music/Bulk/00exnnpjpsprgttidm/[magicabus] - mag 005 - yan tregger - hypnosis/a6 - driver.mp3
                                         'working'  None
                                         'bitrate'  320
                                    'duration_sec'  138
                                           'genre'  electronic-experimental-oddness
                                        'filesize'  5526455
                                           'mtime'  1621629029
                                   'redo_metaread'  0
                                        'rest_str'   00exnnpjpsprgttidm [magicabus] mag 005 yan tregger hypnosis a6 electronic experimental oddness
                                      'tag_artist'  Yan Tregger
                                     'tag_release'  None
                                       'tag_title'  driver
                                             'bpm'  123.36
                                    'search_title'  'driver':1
                                   'search_artist'  'tregger':2 'yan':1
                                  'search_release'  
                                     'search_rest'  'a6':7 'electronic':8 'experimental':9 'hypnosis':6 'mag':3 'magicabus':1,2 'oddness':10 'tregger':5 'yan':4
                                    'search_combo'  'a6':10 'driver':1A 'electronic':11 'experimental':12 'hypnosis':9 'mag':6 'magicabus':4,5 'oddness':13 'tregger':3B,8 'yan':2B,7
                                    '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-4', 'Q-JZFKS-1', 'q-busy-3', 'q-drums-4', 'q-syn-2', 'q-chart-1', 'q-other-3', 'Q-HAP-3', 'q-bass-1', 'q-grit-2']
                                      'lastfmtags'  ['pop', 'funk', 'soul', 'french', 'rock']
                                        'tag_date'  2000
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1621629029.199882  (2021-05-21 22:30:29)
                             'size'  5526455