======================== unified (from filesystem) ========================
                                         'bitrate'  '320.0'
                                        'duration'  '147'
                                          'artist'  'Marty Robbins'
                                     'text_people'  ''
                                         'release'  'A Lifetime of Song (1951-1982)'
                                           'title'  'Singing The Blues'
                                           'quals'  ("['Q-HAP-3', 'Q-JZFKS-1', 'Q-UNU-1', 'Q-LOCALNESS-2', 'Q-HHRNBTT-1', "
 "'Q-OLDST-1', 'q-syn-1', 'q-bass-2', 'q-busy-2', 'q-grit-1', 'q-play-2', "
 "'q-chart-1', 'q-drums-1', 'q-other-3', 'q-piano-1', 'q-vocals-4', "
 "'q-mixbeat-1']")
                                      'lastfmtags'  "['classic country', 'americana', 'country', 'male vocalists', '50s']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '125'
                                      'tracktotal'  ''
                                            'date'  '1956'
                                        'comments'  ''
                                           'genre'  'prerock-unsorted'
                                             'bpm'  '143.517'
                                             'key'  '7B'
                                        'acoustid'  ''
rest: ''

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

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'TALB' (Album/Movie/Show title)                     'A Lifetime of Song (1951-1982)'
'TBPM' (BPM (beats per minute))                     '143.517'
'TCON' (Content type, a.k.a. Genre)                 'prerock-unsorted'
'TDRC' (Recording time)                             '1956'
'TIT2' (Title/songname/content description)         'Singing The Blues'
'TKEY' (Initial key)                                '7B'
'TLEN' (Length)                                     '147506'
'TPE1' (Lead performer(s)/Soloist(s))               'Marty Robbins'
'TPUB' (Publisher)                                  'Columbia'
'TRCK' (Track number/Position in set)               '125'
'TXXX:Q-HAP'                                        '3'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '1'
'TXXX:Q-LOCALNESS'                                  '2'
'TXXX:Q-OLDST'                                      '1'
'TXXX:Q-UNU'                                        '1'
'TXXX:lastfmtags'                                   ['classic country', 'americana', 'country', 'male vocalists', '50s']
'TXXX:q-bass'                                       '2'
'TXXX:q-busy'                                       '2'
'TXXX:q-chart'                                      '1'
'TXXX:q-drums'                                      '1'
'TXXX:q-grit'                                       '1'
'TXXX:q-mixbeat'                                    '1'
'TXXX:q-other'                                      '3'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '2'
'TXXX:q-syn'                                        '1'
'TXXX:q-vocals'                                     '4'
'TXXX:replaygain_track_gain'                        '-0.80 dB'
'TXXX:replaygain_track_peak'                        '0.513545'

========================== row from database ==========================
                                              'id'  1437093
                                            'path'  /data/Music/Bulk/00blues-jazz-exotica-oldies-country/00oldiepop/1956/1956-125 - Marty Robbins - Singing The Blues.mp3
                                         'working'  None
                                         'bitrate'  320
                                    'duration_sec'  147
                                           'genre'  prerock-unsorted
                                        'filesize'  5902216
                                           'mtime'  1621698263
                                   'redo_metaread'  0
                                        'rest_str'   00blues jazz exotica oldies country 00oldiepop 1956 1956 125 prerock unsorted
                                      'tag_artist'  Marty Robbins
                                     'tag_release'  A Lifetime of Song (1951-1982)
                                       'tag_title'  Singing The Blues
                                             'bpm'  143.517
                                    'search_title'  'blues':3 'singing':1 'the':2
                                   'search_artist'  'marty':1 'robbins':2
                                  'search_release'  '1951':5 '19511982':7 '1982':6 'a':1 'lifetime':2 'of':3 'song':4
                                     'search_rest'  '00oldiepop':5 '125':7 '1956':6 'country':4 'exotica':2 'jazz':1 'oldies':3 'prerock':8 'unsorted':9
                                    'search_combo'  '00oldiepop':17 '125':19 '1951':10C '19511982':12C '1956':18 '1982':11C 'a':6C 'blues':3A 'country':16 'exotica':14 'jazz':13 'lifetime':7C 'marty':4B 'of':8C 'oldies':15 'prerock':20 'robbins':5B 'singing':1A 'song':9C 'the':2A 'unsorted':21
                                    'tag_tracknum'  125
                                      'num_images'  0
                                             'key'  7B
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-4', 'Q-LOCALNESS-2', 'q-piano-1', 'q-mixbeat-1', 'q-play-2', 'Q-OLDST-1', 'Q-UNU-1', 'Q-JZFKS-1', 'q-busy-2', 'q-drums-1', 'q-syn-1', 'q-chart-1', 'q-other-3', 'Q-HAP-3', 'q-bass-2', 'q-grit-1']
                                      'lastfmtags'  ['classic country', 'americana', 'country', 'male vocalists', '50s']
                                        'tag_date'  1956
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1621698262.7605975  (2021-05-22 17:44:22)
                             'size'  5902216