======================== unified (from filesystem) ========================
                                         'bitrate'  '160.0'
                                        'duration'  '171'
                                          'artist'  'Hedges Brothers (Elven & Fred)'
                                     'text_people'  ''
                                         'release'  'Columbia   2172'
                                           'title'  'Land Of Cotton (piano - Jesse Jacobson)'
                                           'quals'  ("['Q-HAP-3', 'q-piano-3', 'Q-JZFKS-1', 'Q-LOCALNESS-1', 'Q-UNU-1', "
 "'Q-HHRNBTT-1', 'Q-OLDST-1', 'q-syn-1', 'q-bass-1', 'q-busy-3', 'q-grit-1', "
 "'q-play-2', 'q-chart-1', 'q-drums-1', 'q-other-2', 'q-vocals-4', "
 "'q-mixbeat-1']")
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  ''
                                      'tracktotal'  ''
                                            'date'  '1913'
                                        'comments'  ''
                                           'genre'  'prerock-instrumental'
                                             'bpm'  '120.686'
                                             'key'  '5A'
                                        'acoustid'  ''
rest: ''

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

'TALB' (Album/Movie/Show title)                     'Columbia   2172'
'TBPM' (BPM (beats per minute))                     '120.686'
'TCON' (Content type, a.k.a. Genre)                 'prerock-instrumental'
'TDRC' (Recording time)                             '1913'
'TIT2' (Title/songname/content description)         'Land Of Cotton (piano - Jesse Jacobson)'
'TKEY' (Initial key)                                '5A'
'TPE1' (Lead performer(s)/Soloist(s))               'Hedges Brothers (Elven & Fred)'
'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:q-bass'                                       '1'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '1'
'TXXX:q-drums'                                      '1'
'TXXX:q-grit'                                       '1'
'TXXX:q-mixbeat'                                    '1'
'TXXX:q-other'                                      '2'
'TXXX:q-piano'                                      '3'
'TXXX:q-play'                                       '2'
'TXXX:q-syn'                                        '1'
'TXXX:q-vocals'                                     '4'
'TXXX:replaygain_track_gain'                        '+0.57 dB'
'TXXX:replaygain_track_peak'                        '0.554745'

========================== row from database ==========================
                                              'id'  1445484
                                            'path'  /data/Music/Bulk/00blues-jazz-exotica-oldies-country/00oldiepop/1913/Hedges Brothers (Elven & Fred) - Land Of Cotton (piano - Jesse Jacobson) -4-1913.mp3
                                         'working'  None
                                         'bitrate'  160
                                    'duration_sec'  171
                                           'genre'  prerock-instrumental
                                        'filesize'  3427955
                                           'mtime'  1621705363
                                   'redo_metaread'  0
                                        'rest_str'   00blues jazz exotica oldies country 00oldiepop 1913 4 1913 prerock instrumental
                                      'tag_artist'  Hedges Brothers (Elven & Fred)
                                     'tag_release'  Columbia   2172
                                       'tag_title'  Land Of Cotton (piano - Jesse Jacobson)
                                             'bpm'  120.686
                                    'search_title'  'cotton':3 'jacobson':7,8 'jesse':6 'land':1 'of':2 'piano':4,5
                                   'search_artist'  'brothers':2 'elven':3,4 'fred':5,6 'hedges':1
                                  'search_release'  '2172':2 'columbia':1
                                     'search_rest'  '00oldiepop':5 '1913':6 '4':7 'country':4 'exotica':2 'instrumental':9 'jazz':1 'oldies':3 'prerock':8
                                    'search_combo'  '00oldiepop':21 '1913':22 '2172':16C '4':23 'brothers':10B 'columbia':15C 'cotton':3A 'country':20 'elven':11B,12B 'exotica':18 'fred':13B,14B 'hedges':9B 'instrumental':25 'jacobson':7A,8A 'jazz':17 'jesse':6A 'land':1A 'of':2A 'oldies':19 'piano':4A,5A 'prerock':24
                                    'tag_tracknum'  None
                                      'num_images'  0
                                             'key'  5A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-4', 'Q-LOCALNESS-1', 'q-piano-3', '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-2', 'Q-HAP-3', 'q-bass-1', 'q-grit-1']
                                      'lastfmtags'  ['q-chart-1', 'q-drums-1', 'q-vocals-4', 'q-other-2', 'q-busy-3', 'q-mixbeat-1', 'q-syn-1', 'q-play-2', 'q-piano-1', 'q-bass-1', 'q-grit-1']
                                        'tag_date'  1913
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1621705362.7341552  (2021-05-22 19:42:42)
                             'size'  3427955