======================== unified (from filesystem) ========================
                                         'bitrate'  '128.0'
                                        'duration'  '166'
                                          'artist'  'Spice Girls'
                                     'text_people'  ''
                                         'release'  ''
                                           'title'  'Track 6'
                                           'quals'  ("['Q-HAP-3', 'Q-LOCALNESS-1', 'Q-HHRNBTT-1', 'Q-JZFKS-1', 'Q-UNU-1', "
 "'Q-OLDST-3', 'q-syn-2', 'q-bass-3', 'q-busy-3', 'q-grit-2', 'q-play-2', "
 "'q-chart-3', 'q-drums-4', 'q-other-1', 'q-piano-1', 'q-vocals-3', "
 "'q-mixbeat-2']")
                                      'lastfmtags'  "['dance', '90s', 'female vocalists', 'british', 'pop']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  ''
                                      'tracktotal'  ''
                                            'date'  '1995'
                                        'comments'  ''
                                           'genre'  'electronic-generic or radio-unsorted'
                                             'bpm'  '104.015'
                                             'key'  '6A'
                                        'acoustid'  ''
rest: ''

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

'TBPM' (BPM (beats per minute))                     '104.015'
'TCON' (Content type, a.k.a. Genre)                 'electronic-generic or radio-unsorted'
'TDRC' (Recording time)                             '1995'
'TFLT' (File type)                                  '/3'
'TIT2' (Title/songname/content description)         'Track 6'
'TKEY' (Initial key)                                '6A'
'TMED' (Media type)                                 '(CD/DD)'
'TPE1' (Lead performer(s)/Soloist(s))               'Spice Girls'
'TXXX:Q-HAP'                                        '3'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '1'
'TXXX:Q-LOCALNESS'                                  '1'
'TXXX:Q-OLDST'                                      '3'
'TXXX:Q-UNU'                                        '1'
'TXXX:lastfmtags'                                   ['dance', '90s', 'female vocalists', 'british', 'pop']
'TXXX:q-bass'                                       '3'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '3'
'TXXX:q-drums'                                      '4'
'TXXX:q-grit'                                       '2'
'TXXX:q-mixbeat'                                    '2'
'TXXX:q-other'                                      '1'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '2'
'TXXX:q-syn'                                        '2'
'TXXX:q-vocals'                                     '3'
'TXXX:replaygain_track_gain'                        '+0.44 dB'
'TXXX:replaygain_track_peak'                        '0.608365'

========================== row from database ==========================
                                              'id'  1314278
                                            'path'  /data/Music/Bulk/00poprockelectronic/Spice Girls/Spice Girls -  Generation Next (Pepsi Song).mp3
                                         'working'  None
                                         'bitrate'  128
                                    'duration_sec'  166
                                           'genre'  electronic-generic or radio-unsorted
                                        'filesize'  2666496
                                           'mtime'  1621696607
                                   'redo_metaread'  0
                                        'rest_str'   00poprockelectronic Generation Next (Pepsi Song) electronic generic or radio unsorted
                                      'tag_artist'  Spice Girls
                                     'tag_release'  None
                                       'tag_title'  Track 6
                                             'bpm'  104.015
                                    'search_title'  '6':2 'track':1
                                   'search_artist'  'girls':2 'spice':1
                                  'search_release'  
                                     'search_rest'  '00poprockelectronic':1 'electronic':8 'generation':2 'generic':9 'next':3 'or':10 'pepsi':4,5 'radio':11 'song':6,7 'unsorted':12
                                    'search_combo'  '00poprockelectronic':5 '6':2A 'electronic':12 'generation':6 'generic':13 'girls':4B 'next':7 'or':14 'pepsi':8,9 'radio':15 'song':10,11 'spice':3B 'track':1A 'unsorted':16
                                    'tag_tracknum'  None
                                      'num_images'  0
                                             'key'  6A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-3', 'Q-LOCALNESS-1', 'q-piano-1', 'q-mixbeat-2', 'q-play-2', 'Q-OLDST-3', 'Q-UNU-1', 'Q-JZFKS-1', 'q-busy-3', 'q-drums-4', 'q-syn-2', 'q-chart-3', 'q-other-1', 'Q-HAP-3', 'q-bass-3', 'q-grit-2']
                                      'lastfmtags'  ['dance', '90s', 'female vocalists', 'british', 'pop']
                                        'tag_date'  1995
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1621696606.6892834  (2021-05-22 17:16:46)
                             'size'  2666496