======================== unified (from filesystem) ========================
                                         'bitrate'  '160.0'
                                        'duration'  '176'
                                          'artist'  "Mario 'Harp' Lorenzi Rhythmics"
                                     'text_people'  ''
                                         'release'  'Columbia FB  1406'
                                           'title'  'Whistling Waltz (vocal - Marjorie Stedeford)'
                                           '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-2', 'q-grit-1', 'q-play-2', "
 "'q-chart-1', 'q-drums-1', 'q-other-3', 'q-piano-1', 'q-vocals-3', "
 "'q-mixbeat-1']")
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  ''
                                      'tracktotal'  ''
                                            'date'  '1936'
                                        'comments'  ''
                                           'genre'  'prerock-unsorted'
                                             'bpm'  '142.608'
                                             'key'  '6B'
                                        'acoustid'  ''
rest: ''

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

'TALB' (Album/Movie/Show title)                     'Columbia FB  1406'
'TBPM' (BPM (beats per minute))                     '142.608'
'TCON' (Content type, a.k.a. Genre)                 'prerock-unsorted'
'TDRC' (Recording time)                             '1936'
'TIT2' (Title/songname/content description)         'Whistling Waltz (vocal - Marjorie Stedeford)'
'TKEY' (Initial key)                                '6B'
'TPE1' (Lead performer(s)/Soloist(s))               "Mario 'Harp' Lorenzi Rhythmics"
'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'                                       '4'
'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'                                     '3'
'TXXX:replaygain_track_gain'                        '-0.04 dB'
'TXXX:replaygain_track_peak'                        '0.655629'

========================== row from database ==========================
                                              'id'  1498289
                                            'path'  /data/Music/Bulk/00blues-jazz-exotica-oldies-country/00oldiepop/1936/Mario _Harp_ Lorenzi Rhythmics - Whistling Waltz (vocal - Marjorie Stedeford) 14-5-1936.mp3
                                         'working'  None
                                         'bitrate'  160
                                    'duration_sec'  176
                                           'genre'  prerock-unsorted
                                        'filesize'  3530546
                                           'mtime'  1621697996
                                   'redo_metaread'  0
                                        'rest_str'   00blues jazz exotica oldies country 00oldiepop 1936 _Harp_ 5 1936 prerock unsorted
                                      'tag_artist'  Mario 'Harp' Lorenzi Rhythmics
                                     'tag_release'  Columbia FB  1406
                                       'tag_title'  Whistling Waltz (vocal - Marjorie Stedeford)
                                             'bpm'  142.608
                                    'search_title'  'marjorie':5 'stedeford':6,7 'vocal':3,4 'waltz':2 'whistling':1
                                   'search_artist'  'harp':2,3 'lorenzi':4 'mario':1 'rhythmics':5
                                  'search_release'  '1406':3 'columbia':1 'fb':2
                                     'search_rest'  '00oldiepop':5 '1936':6 '5':8 'country':4 'exotica':2 'harp':7 'jazz':1 'oldies':3 'prerock':9 'unsorted':10
                                    'search_combo'  '00oldiepop':20 '1406':15C '1936':21 '5':23 'columbia':13C 'country':19 'exotica':17 'fb':14C 'harp':9B,10B,22 'jazz':16 'lorenzi':11B 'mario':8B 'marjorie':5A 'oldies':18 'prerock':24 'rhythmics':12B 'stedeford':6A,7A 'unsorted':25 'vocal':3A,4A 'waltz':2A 'whistling':1A
                                    'tag_tracknum'  None
                                      'num_images'  0
                                             'key'  6B
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-3', 'Q-LOCALNESS-1', '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-4', 'q-grit-1']
                                      'lastfmtags'  []
                                        'tag_date'  1936
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1621697995.744331  (2021-05-22 17:39:55)
                             'size'  3530546