======================== unified (from filesystem) ========================
                                         'bitrate'  '128.0'
                                        'duration'  '225'
                                          'artist'  'Johnny Cash'
                                     'text_people'  ''
                                         'release'  "Reader's Digest Classics (disc"
                                           'title'  'The City of New Orleans'
                                           'quals'  ("['Q-HAP-2', 'Q-LOCALNESS-1', 'Q-JZFKS-1', 'Q-UNU-1', 'Q-HHRNBTT-1', "
 "'Q-OLDST-1', 'q-syn-1', 'q-bass-4', 'q-busy-3', 'q-grit-2', 'q-play-3', "
 "'q-chart-4', 'q-drums-2', 'q-other-2', 'q-piano-1', 'q-vocals-4', "
 "'q-mixbeat-1']")
                                      'lastfmtags'  "['country', 'singer songwritergdchill', 'cover', 'singer songwriter']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '8'
                                      'tracktotal'  ''
                                            'date'  '1958'
                                        'comments'  ''
                                           'genre'  'ifs-songwriter'
                                             'bpm'  '84.632'
                                             'key'  '7A'
                                        'acoustid'  ''
rest: ''

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

'TALB' (Album/Movie/Show title)                     "Reader's Digest Classics (disc"
'TBPM' (BPM (beats per minute))                     '84.632'
'TCON' (Content type, a.k.a. Genre)                 'ifs-songwriter'
'TDRC' (Recording time)                             '1958'
'TIT2' (Title/songname/content description)         'The City of New Orleans'
'TKEY' (Initial key)                                '7A'
'TPE1' (Lead performer(s)/Soloist(s))               'Johnny Cash'
'TRCK' (Track number/Position in set)               '8'
'TXXX:Q-HAP'                                        '2'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '1'
'TXXX:Q-LOCALNESS'                                  '1'
'TXXX:Q-OLDST'                                      '1'
'TXXX:Q-UNU'                                        '1'
'TXXX:lastfmtags'                                   ['country', 'singer songwritergdchill', 'cover', 'singer songwriter']
'TXXX:q-bass'                                       '4'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '4'
'TXXX:q-drums'                                      '2'
'TXXX:q-grit'                                       '2'
'TXXX:q-mixbeat'                                    '1'
'TXXX:q-other'                                      '2'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '3'
'TXXX:q-syn'                                        '1'
'TXXX:q-vocals'                                     '4'
'TXXX:replaygain_track_gain'                        '-0.37 dB'
'TXXX:replaygain_track_peak'                        '0.714743'

========================== row from database ==========================
                                              'id'  232539
                                            'path'  /data/Music/Bulk/00singer-songwriter-eos/Johnny Cash/cifsdb4b.mp3
                                         'working'  None
                                         'bitrate'  128
                                    'duration_sec'  225
                                           'genre'  ifs-songwriter
                                        'filesize'  3605335
                                           'mtime'  1636400315
                                   'redo_metaread'  0
                                        'rest_str'   00singer songwriter eos cifsdb4b ifs songwriter
                                      'tag_artist'  Johnny Cash
                                     'tag_release'  Reader's Digest Classics (disc
                                       'tag_title'  The City of New Orleans
                                             'bpm'  84.632
                                    'search_title'  'city':2 'new':4 'of':3 'orleans':5 'the':1
                                   'search_artist'  'cash':2 'johnny':1
                                  'search_release'  'classics':5 'digest':4 'disc':6,7 'reader':1 'readers':3 's':2
                                     'search_rest'  '00singer':1 'cifsdb4b':4 'eos':3 'ifs':5 'songwriter':2
                                    'search_combo'  '00singer':15 'cash':7B 'cifsdb4b':18 'city':2A 'classics':12C 'digest':11C 'disc':13C,14C 'eos':17 'ifs':19 'johnny':6B 'new':4A 'of':3A 'orleans':5A 'reader':8C 'readers':10C 's':9C 'songwriter':16 'the':1A
                                    'tag_tracknum'  8
                                      'num_images'  0
                                             'key'  7A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-4', 'Q-LOCALNESS-1', 'q-piano-1', 'q-mixbeat-1', 'q-play-3', 'Q-OLDST-1', 'Q-UNU-1', 'Q-JZFKS-1', 'q-busy-3', 'q-drums-2', 'q-syn-1', 'q-chart-4', 'q-other-2', 'Q-HAP-2', 'q-bass-4', 'q-grit-2']
                                      'lastfmtags'  ['country', 'singer songwritergdchill', 'cover', 'singer songwriter']
                                        'tag_date'  1958
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1636400314.9415925  (2021-11-08 20:38:34)
                             'size'  3605335