======================== unified (from filesystem) ========================
                                         'bitrate'  '253.071'
                                        'duration'  '178'
                                          'artist'  'Postdata'
                                     'text_people'  ''
                                         'release'  'Postdata'
                                           'title'  'Warning'
                                           'quals'  ("['Q-HAP-2', 'Q-UNU-1', 'Q-OLDST-3', 'Q-LOCALNESS-1', 'Q-HHRNBTT-1', "
 "'Q-JZFKS-1', 'q-syn-2', 'q-bass-1', 'q-busy-3', 'q-grit-2', 'q-play-2', "
 "'q-chart-2', 'q-drums-1', 'q-other-3', 'q-piano-1', 'q-vocals-4', "
 "'q-mixbeat-1']")
                                      'lastfmtags'  "['indie', 'wintersleep', 'pop', 'folk', 'canadian']"
                                     'discogstags'  "['folk, world, & country', 'folk']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '7'
                                      'tracktotal'  ''
                                            'date'  '2010'
                                        'comments'  ''
                                           'genre'  'ifs-songwriter-indie-unsorted'
                                             'bpm'  '125.006'
                                             'key'  '9A'
                                        'acoustid'  ''
rest: ''

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

'TALB' (Album/Movie/Show title)                     'Postdata'
'TBPM' (BPM (beats per minute))                     '125.006'
'TCON' (Content type, a.k.a. Genre)                 'ifs-songwriter-indie-unsorted'
'TDRC' (Recording time)                             '2010'
'TIT2' (Title/songname/content description)         'Warning'
'TKEY' (Initial key)                                '9A'
'TPE1' (Lead performer(s)/Soloist(s))               'Postdata'
'TRCK' (Track number/Position in set)               '7'
'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'                                  ['folk, world, & country', 'folk']
'TXXX:lastfmtags'                                   ['indie', 'wintersleep', 'pop', 'folk', 'canadian']
'TXXX:q-bass'                                       '1'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '2'
'TXXX:q-drums'                                      '1'
'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'                                     '4'
'TXXX:replaygain_track_gain'                        '+2.74 dB'
'TXXX:replaygain_track_peak'                        '0.511364'

========================== row from database ==========================
                                              'id'  1254478
                                            'path'  /data/Music/Bulk/00singer-songwriter-eos/postdata - 2010 - self titled/07 warning.mp3
                                         'working'  None
                                         'bitrate'  253
                                    'duration_sec'  178
                                           'genre'  ifs-songwriter-indie-unsorted
                                        'filesize'  5648443
                                           'mtime'  1636400413
                                   'redo_metaread'  0
                                        'rest_str'   00singer songwriter eos postdata 2010 self titled 07 warning ifs songwriter indie unsorted
                                      'tag_artist'  Postdata
                                     'tag_release'  Postdata
                                       'tag_title'  Warning
                                             'bpm'  125.006
                                    'search_title'  'warning':1
                                   'search_artist'  'postdata':1
                                  'search_release'  'postdata':1
                                     'search_rest'  '00singer':1 '2010':5 'eos':3 'ifs':9 'indie':10 'postdata':4 'self':6 'songwriter':2 'titled':7 'unsorted':11 'warning':8
                                    'search_combo'  '00singer':4 '2010':8 'eos':6 'ifs':12 'indie':13 'postdata':2B,3C,7 'self':9 'songwriter':5 'titled':10 'unsorted':14 'warning':1A,11
                                    'tag_tracknum'  7
                                      'num_images'  0
                                             'key'  9A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-4', 'Q-LOCALNESS-1', 'q-piano-1', 'q-mixbeat-1', 'q-play-2', 'Q-OLDST-3', 'Q-UNU-1', 'Q-JZFKS-1', 'q-busy-3', 'q-drums-1', 'q-syn-2', 'q-chart-2', 'q-other-3', 'Q-HAP-2', 'q-bass-1', 'q-grit-2']
                                      'lastfmtags'  ['indie', 'wintersleep', 'pop', 'folk', 'canadian']
                                        'tag_date'  2010
                                     'discogstags'  ['folk, world, & country', 'folk']

============================== file details ==============================
                                           'mtime'  1636400412.9148495  (2021-11-08 20:40:12)
                             'size'  5648443