======================== unified (from filesystem) ========================
                                         'bitrate'  '160.0'
                                        'duration'  '202'
                                          'artist'  "Joseph C Smith's Orchestra"
                                     'text_people'  ''
                                         'release'  ''
                                           'title'  'Nashville Nightingale'
                                           'quals'  ("['Q-HAP-3', 'Q-JZFKS-2', '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-4', 'q-piano-1', 'q-vocals-2', "
 "'q-mixbeat-1']")
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  ''
                                      'tracktotal'  ''
                                            'date'  '1924'
                                        'comments'  ''
                                           'genre'  'prerock-band'
                                             'bpm'  '145.6'
                                             'key'  '3A'
                                        'acoustid'  ''
rest: ''

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

'APIC:'                                             type PictureType.COVER_FRONT (Cover (front)) b''
                                     
'COMM:MusicMatch_Bio:eng'                           'Sound edited by Breda4@hotmail.com'
'TBPM' (BPM (beats per minute))                     '145.6'
'TCON' (Content type, a.k.a. Genre)                 'prerock-band'
'TDRC' (Recording time)                             '1924'
'TIT2' (Title/songname/content description)         'Nashville Nightingale'
'TKEY' (Initial key)                                '3A'
'TLEN' (Length)                                     '202000'
'TPE1' (Lead performer(s)/Soloist(s))               "Joseph C Smith's Orchestra"
'TXXX:Q-HAP'                                        '3'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '2'
'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'                                      '4'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '2'
'TXXX:q-syn'                                        '1'
'TXXX:q-vocals'                                     '2'
'TXXX:replaygain_track_gain'                        '+0.54 dB'
'TXXX:replaygain_track_peak'                        '0.663867'

========================== row from database ==========================
                                              'id'  1500676
                                            'path'  /data/Music/Bulk/00blues-jazz-exotica-oldies-country/00oldiepop/1924/Joseph C Smith_s Orchestra - Nashville Nightingale 1924.mp3
                                         'working'  None
                                         'bitrate'  160
                                    'duration_sec'  202
                                           'genre'  prerock-band
                                        'filesize'  4122396
                                           'mtime'  1620559915
                                   'redo_metaread'  0
                                        'rest_str'   00blues jazz exotica oldies country 00oldiepop 1924 Smith_s 1924 prerock band
                                      'tag_artist'  Joseph C Smith's Orchestra
                                     'tag_release'  None
                                       'tag_title'  Nashville Nightingale
                                             'bpm'  145.6
                                    'search_title'  'nashville':1 'nightingale':2
                                   'search_artist'  'c':2 'joseph':1 'orchestra':6 's':4 'smith':3 'smiths':5
                                  'search_release'  
                                     'search_rest'  '00oldiepop':5 '1924':6 'band':10 'country':4 'exotica':2 'jazz':1 'oldies':3 'prerock':9 's':8 'smith':7
                                    'search_combo'  '00oldiepop':13 '1924':14 'band':18 'c':4B 'country':12 'exotica':10 'jazz':9 'joseph':3B 'nashville':1A 'nightingale':2A 'oldies':11 'orchestra':8B 'prerock':17 's':6B,16 'smith':5B,15 'smiths':7B
                                    'tag_tracknum'  None
                                      'num_images'  1
                                             'key'  3A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-2', 'Q-LOCALNESS-1', 'q-piano-1', 'q-mixbeat-1', 'q-play-2', 'Q-OLDST-1', 'Q-UNU-1', 'Q-JZFKS-2', 'q-busy-3', 'q-drums-1', 'q-syn-1', 'q-chart-1', 'q-other-4', 'Q-HAP-3', 'q-bass-1', 'q-grit-1']
                                      'lastfmtags'  []
                                        'tag_date'  1924
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1620559914.8722463  (2021-05-09 13:31:54)
                             'size'  4122396