======================== unified (from filesystem) ========================
                                         'bitrate'  '128.0'
                                        'duration'  '254'
                                          'artist'  'Over the Rhine'
                                     'text_people'  ''
                                         'release'  ''
                                           'title'  "Everyman's Daughter"
                                           'quals'  ("['Q-HAP-2', 'Q-UNU-1', 'Q-OLDST-3', 'Q-LOCALNESS-1', 'Q-JZFKS-1', "
 "'Q-HHRNBTT-1', 'q-syn-2', 'q-bass-1', 'q-busy-3', 'q-grit-2', 'q-play-3', "
 "'q-chart-2', 'q-drums-3', 'q-other-3', 'q-piano-1', 'q-vocals-3', "
 "'q-mixbeat-1']")
                                      'lastfmtags'  "['indie', 'alt country', 'alternative', 'female vocalists', 'folk']"
                                     'discogstags'  "['rock']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  ''
                                      'tracktotal'  ''
                                            'date'  ''
                                        'comments'  ''
                                           'genre'  'ifs-songwriter'
                                             'bpm'  '113.772'
                                             'key'  '10A'
                                        'acoustid'  ''
rest: ''

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

'TBPM' (BPM (beats per minute))                     '113.772'
'TCON' (Content type, a.k.a. Genre)                 'ifs-songwriter'
'TIT2' (Title/songname/content description)         "Everyman's Daughter"
'TKEY' (Initial key)                                '10A'
'TPE1' (Lead performer(s)/Soloist(s))               'Over the Rhine'
'TXXX:Q-HAP'                                        '2'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '1'
'TXXX:Q-LOCALNESS'                                  '1'
'TXXX:Q-OLDST'                                      '3'
'TXXX:Q-UNU'                                        '1'
'TXXX:discogstags'                                  'rock'
'TXXX:lastfmtags'                                   ['indie', 'alt country', 'alternative', 'female vocalists', 'folk']
'TXXX:q-bass'                                       '1'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '2'
'TXXX:q-drums'                                      '3'
'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'                                     '3'
'TXXX:replaygain_track_gain'                        '+0.36 dB'
'TXXX:replaygain_track_peak'                        '0.762933'

========================== row from database ==========================
                                              'id'  233185
                                            'path'  /data/Music/Bulk/00singer-songwriter-eos/Over the Rhine/Over The Rhine - Good Dog _ Bad Dog - 07 - 7.mp3
                                         'working'  None
                                         'bitrate'  128
                                    'duration_sec'  254
                                           'genre'  ifs-songwriter
                                        'filesize'  4079234
                                           'mtime'  1636400392
                                   'redo_metaread'  0
                                        'rest_str'   00singer songwriter eos The Good Dog _ Bad Dog 07 7 ifs songwriter
                                      'tag_artist'  Over the Rhine
                                     'tag_release'  None
                                       'tag_title'  Everyman's Daughter
                                             'bpm'  113.772
                                    'search_title'  'daughter':4 'everyman':1 'everymans':3 's':2
                                   'search_artist'  'over':1 'rhine':3 'the':2
                                  'search_release'  
                                     'search_rest'  '00singer':1 '7':8 'bad':7 'dog':6 'eos':3 'good':5 'ifs':9 'songwriter':2 'the':4
                                    'search_combo'  '00singer':8 '7':15 'bad':14 'daughter':4A 'dog':13 'eos':10 'everyman':1A 'everymans':3A 'good':12 'ifs':16 'over':5B 'rhine':7B 's':2A 'songwriter':9 'the':6B,11
                                    'tag_tracknum'  None
                                      'num_images'  0
                                             'key'  10A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-3', 'Q-LOCALNESS-1', 'q-piano-1', 'q-mixbeat-1', 'q-play-3', 'Q-OLDST-3', 'Q-UNU-1', 'Q-JZFKS-1', 'q-busy-3', 'q-drums-3', 'q-syn-2', 'q-chart-2', 'q-other-3', 'Q-HAP-2', 'q-bass-1', 'q-grit-2']
                                      'lastfmtags'  ['indie', 'alt country', 'alternative', 'female vocalists', 'folk']
                                        'tag_date'  
                                     'discogstags'  ['rock']

============================== file details ==============================
                                           'mtime'  1636400392.3154867  (2021-11-08 20:39:52)
                             'size'  4079234