======================== unified (from filesystem) ========================
                                         'bitrate'  '160.0'
                                        'duration'  '147'
                                          'artist'  'Perry Como'
                                     'text_people'  ''
                                         'release'  ''
                                           'title'  "There's No Boat Like A Row Boat (+ Fontane Sisters)"
                                           'quals'  ("['Q-HAP-3', 'Q-JZFKS-1', 'Q-LOCALNESS-1', 'Q-UNU-1', 'Q-HHRNBTT-1', "
 "'Q-OLDST-1', 'q-syn-1', 'q-bass-4', 'q-busy-3', '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'  "['oldies', 'male vocalists', 'jazz', '50s', 'easy listening', 'christmas']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  ''
                                      'tracktotal'  ''
                                            'date'  '1951'
                                        'comments'  ''
                                           'genre'  'prerock-vocal-easy'
                                             'bpm'  '133.756'
                                             'key'  '11A'
                                        'acoustid'  ''
rest: ''

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

'TBPM' (BPM (beats per minute))                     '133.756'
'TCON' (Content type, a.k.a. Genre)                 'prerock-vocal-easy'
'TDRC' (Recording time)                             '1951'
'TIT2' (Title/songname/content description)         "There's No Boat Like A Row Boat (+ Fontane Sisters)"
'TKEY' (Initial key)                                '11A'
'TPE1' (Lead performer(s)/Soloist(s))               'Perry Como'
'TXXX:Q-HAP'                                        '3'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '1'
'TXXX:Q-LOCALNESS'                                  '1'
'TXXX:Q-OLDST'                                      '1'
'TXXX:Q-UNU'                                        '1'
'TXXX:lastfmtags'                                   ['oldies', 'male vocalists', 'jazz', '50s', 'easy listening', 'christmas']
'TXXX:q-bass'                                       '4'
'TXXX:q-busy'                                       '3'
'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'                        '+1.19 dB'
'TXXX:replaygain_track_peak'                        '0.471191'

========================== row from database ==========================
                                              'id'  1505914
                                            'path'  /data/Music/Bulk/00blues-jazz-exotica-oldies-country/00oldiepop/1951/Perry Como - There_s No Boat Like A Row Boat (+ Fontane Sisters) 23-6-1951.mp3
                                         'working'  None
                                         'bitrate'  160
                                    'duration_sec'  147
                                           'genre'  prerock-vocal-easy
                                        'filesize'  2942770
                                           'mtime'  1621625762
                                   'redo_metaread'  0
                                        'rest_str'   00blues jazz exotica oldies country 00oldiepop 1951 There_s 23 6 1951 prerock vocal easy
                                      'tag_artist'  Perry Como
                                     'tag_release'  None
                                       'tag_title'  There's No Boat Like A Row Boat (+ Fontane Sisters)
                                             'bpm'  133.756
                                    'search_title'  'a':7 'boat':5 'fontane':9 'like':6 'no':4 'row':8 's':2 'sisters':10,11 'there':1 'theres':3
                                   'search_artist'  'como':2 'perry':1
                                  'search_release'  
                                     'search_rest'  '00oldiepop':5 '1951':6 '23':9 '6':10 'country':4 'easy':13 'exotica':2 'jazz':1 'oldies':3 'prerock':11 's':8 'there':7 'vocal':12
                                    'search_combo'  '00oldiepop':18 '1951':19 '23':22 '6':23 'a':7A 'boat':5A 'como':13B 'country':17 'easy':26 'exotica':15 'fontane':9A 'jazz':14 'like':6A 'no':4A 'oldies':16 'perry':12B 'prerock':24 'row':8A 's':2A,21 'sisters':10A,11A 'there':1A,20 'theres':3A 'vocal':25
                                    'tag_tracknum'  None
                                      'num_images'  0
                                             'key'  11A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-4', 'Q-LOCALNESS-1', 'q-piano-1', 'q-mixbeat-1', 'q-play-2', 'Q-OLDST-1', 'Q-UNU-1', 'Q-JZFKS-1', 'q-busy-3', 'q-drums-1', 'q-syn-1', 'q-chart-1', 'q-other-3', 'Q-HAP-3', 'q-bass-4', 'q-grit-1']
                                      'lastfmtags'  ['oldies', 'male vocalists', 'jazz', '50s', 'easy listening', 'christmas']
                                        'tag_date'  1951
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1621625761.7677736  (2021-05-21 21:36:01)
                             'size'  2942770