======================== unified (from filesystem) ========================
                                         'bitrate'  '160.0'
                                        'duration'  '183'
                                          'artist'  'Harry Roy'
                                     'text_people'  ''
                                         'release'  ''
                                           'title'  "Elmer's Tune (vocal - Harry Roy)"
                                           'quals'  ("['Q-HAP-3', 'Q-LOCALNESS-1', 'Q-UNU-1', 'Q-JZFKS-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-3', "
 "'q-mixbeat-1']")
                                      'lastfmtags'  "['jazz', 'big band', 'british', 'swing']"
                                     'discogstags'  "['jazz']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  ''
                                      'tracktotal'  ''
                                            'date'  '1942'
                                        'comments'  ''
                                           'genre'  'prerock-band'
                                             'bpm'  '145.1'
                                             'key'  '7A'
                                        '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))                     '145.1'
'TCON' (Content type, a.k.a. Genre)                 'prerock-band'
'TDRC' (Recording time)                             '1942-02-16'
'TIT2' (Title/songname/content description)         "Elmer's Tune (vocal - Harry Roy)"
'TKEY' (Initial key)                                '7A'
'TLEN' (Length)                                     '183000'
'TPE1' (Lead performer(s)/Soloist(s))               'Harry Roy'
'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:discogstags'                                  'jazz'
'TXXX:lastfmtags'                                   ['jazz', 'big band', 'british', 'swing']
'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'                                     '3'
'TXXX:replaygain_track_gain'                        '-0.08 dB'
'TXXX:replaygain_track_peak'                        '0.653797'

========================== row from database ==========================
                                              'id'  1503324
                                            'path'  /data/Music/Bulk/00blues-jazz-exotica-oldies-country/00oldiepop/1942/Harry Roy - Elmer_s Tune (vocal - Harry Roy) 16-2-1942.mp3
                                         'working'  None
                                         'bitrate'  160
                                    'duration_sec'  183
                                           'genre'  prerock-band
                                        'filesize'  3701119
                                           'mtime'  1620561019
                                   'redo_metaread'  0
                                        'rest_str'   00blues jazz exotica oldies country 00oldiepop 1942 Elmer_s 16 2 1942 prerock band
                                      'tag_artist'  Harry Roy
                                     'tag_release'  None
                                       'tag_title'  Elmer's Tune (vocal - Harry Roy)
                                             'bpm'  145.1
                                    'search_title'  'elmer':1 'elmers':3 'harry':7 'roy':8,9 's':2 'tune':4 'vocal':5,6
                                   'search_artist'  'harry':1 'roy':2
                                  'search_release'  
                                     'search_rest'  '00oldiepop':5 '1942':6 '2':9 'band':11 'country':4 'elmer':7 'exotica':2 'jazz':1 'oldies':3 'prerock':10 's':8
                                    'search_combo'  '00oldiepop':16 '1942':17 '2':20 'band':22 'country':15 'elmer':1A,18 'elmers':3A 'exotica':13 'harry':7A,10B 'jazz':12 'oldies':14 'prerock':21 'roy':8A,9A,11B 's':2A,19 'tune':4A 'vocal':5A,6A
                                    'tag_tracknum'  None
                                      'num_images'  1
                                             'key'  7A
                                           '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-3', 'q-drums-1', 'q-syn-1', 'q-chart-1', 'q-other-4', 'Q-HAP-3', 'q-bass-1', 'q-grit-1']
                                      'lastfmtags'  ['jazz', 'big band', 'british', 'swing']
                                        'tag_date'  1942
                                     'discogstags'  ['jazz']

============================== file details ==============================
                                           'mtime'  1620561018.7036636  (2021-05-09 13:50:18)
                             'size'  3701119