======================== unified (from filesystem) ========================
                                         'bitrate'  '128.0'
                                        'duration'  '149'
                                          'artist'  'Johnny Cash'
                                     'text_people'  ''
                                         'release'  'American Recordings'
                                           'title'  'Thirteen'
                                           'quals'  ("['Q-HAP-2', 'Q-LOCALNESS-1', 'Q-JZFKS-1', 'Q-UNU-1', 'Q-OLDST-3', "
 "'Q-HHRNBTT-1', 'q-syn-2', 'q-bass-1', 'q-busy-3', 'q-grit-2', 'q-play-3', "
 "'q-chart-4', 'q-drums-1', 'q-other-3', 'q-piano-1', 'q-vocals-4', "
 "'q-mixbeat-1']")
                                      'lastfmtags'  "['country', 'singer songwritergdchill', 'cover', 'singer songwriter']"
                                     'discogstags'  "['rock', 'folk, world, & country', 'country', 'gospel', 'folk', 'acoustic']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '6'
                                      'tracktotal'  ''
                                            'date'  '1994'
                                        'comments'  ''
                                           'genre'  'ifs-songwriter'
                                             'bpm'  '139.948'
                                             'key'  '11B'
                                        'acoustid'  ''
rest: ''

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

'TALB' (Album/Movie/Show title)                     'American Recordings'
'TBPM' (BPM (beats per minute))                     '139.948'
'TCON' (Content type, a.k.a. Genre)                 'ifs-songwriter'
'TDRC' (Recording time)                             '1994'
'TIT2' (Title/songname/content description)         'Thirteen'
'TKEY' (Initial key)                                '11B'
'TPE1' (Lead performer(s)/Soloist(s))               'Johnny Cash'
'TRCK' (Track number/Position in set)               '6'
'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', 'folk, world, & country', 'country', 'gospel', 'folk', 'acoustic']
'TXXX:lastfmtags'                                   ['country', 'singer songwritergdchill', 'cover', 'singer songwriter']
'TXXX:original release date'                        ['1994', '1994']
'TXXX:q-bass'                                       '1'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '4'
'TXXX:q-drums'                                      '1'
'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'                                     '4'
'TXXX:replaygain_track_gain'                        '+1.95 dB'
'TXXX:replaygain_track_peak'                        '0.544986'

========================== row from database ==========================
                                              'id'  239865
                                            'path'  /data/Music/Bulk/00singer-songwriter-eos/Johnny Cash/cifsf27b.mp3
                                         'working'  None
                                         'bitrate'  128
                                    'duration_sec'  149
                                           'genre'  ifs-songwriter
                                        'filesize'  2397693
                                           'mtime'  1636400315
                                   'redo_metaread'  0
                                        'rest_str'   00singer songwriter eos cifsf27b ifs songwriter
                                      'tag_artist'  Johnny Cash
                                     'tag_release'  American Recordings
                                       'tag_title'  Thirteen
                                             'bpm'  139.948
                                    'search_title'  'thirteen':1
                                   'search_artist'  'cash':2 'johnny':1
                                  'search_release'  'american':1 'recordings':2
                                     'search_rest'  '00singer':1 'cifsf27b':4 'eos':3 'ifs':5 'songwriter':2
                                    'search_combo'  '00singer':6 'american':4C 'cash':3B 'cifsf27b':9 'eos':8 'ifs':10 'johnny':2B 'recordings':5C 'songwriter':7 'thirteen':1A
                                    'tag_tracknum'  6
                                      'num_images'  0
                                             'key'  11B
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-4', '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-1', 'q-syn-2', 'q-chart-4', 'q-other-3', 'Q-HAP-2', 'q-bass-1', 'q-grit-2']
                                      'lastfmtags'  ['country', 'singer songwritergdchill', 'cover', 'singer songwriter']
                                        'tag_date'  1994
                                     'discogstags'  ['rock', 'folk, world, & country', 'country', 'gospel', 'folk', 'acoustic']

============================== file details ==============================
                                           'mtime'  1636400315.0434775  (2021-11-08 20:38:35)
                             'size'  2397693