======================== unified (from filesystem) ========================
                                         'bitrate'  '160.0'
                                        'duration'  '211'
                                          'artist'  'Harry Roy'
                                     'text_people'  ''
                                         'release'  'Parlophone F  932'
                                           'title'  "Harry Roy Stage Show Part 4 - Black Eyes & That's A Plenty"
                                           'quals'  ("['Q-HAP-3', 'Q-LOCALNESS-1', 'Q-UNU-1', 'Q-JZFKS-1', 'Q-HHRNBTT-1', "
 "'Q-OLDST-1', 'q-syn-1', 'Q-PLAY-2', 'q-bass-2', 'q-busy-3', 'q-grit-1', "
 "'Q-PIANO-2', 'q-chart-1', 'q-drums-1', 'q-other-4', 'q-vocals-2', "
 "'q-mixbeat-1']")
                                      'lastfmtags'  "['jazz', 'big band', 'british', 'swing']"
                                     'discogstags'  "['jazz']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  ''
                                      'tracktotal'  ''
                                            'date'  '1937'
                                        'comments'  ''
                                           'genre'  'prerock-band'
                                             'bpm'  '125.315'
                                             'key'  '7A'
                                        'acoustid'  ''
rest: ''

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

'TALB' (Album/Movie/Show title)                     'Parlophone F  932'
'TBPM' (BPM (beats per minute))                     '125.315'
'TCON' (Content type, a.k.a. Genre)                 'prerock-band'
'TDRC' (Recording time)                             '1937'
'TIT2' (Title/songname/content description)         "Harry Roy Stage Show Part 4 - Black Eyes & That's A Plenty"
'TKEY' (Initial key)                                '7A'
'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-PIANO'                                      '2'
'TXXX:Q-PLAY'                                       '2'
'TXXX:Q-UNU'                                        '1'
'TXXX:discogstags'                                  'jazz'
'TXXX:lastfmtags'                                   ['jazz', 'big band', 'british', 'swing']
'TXXX:q-bass'                                       '2'
'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-syn'                                        '1'
'TXXX:q-vocals'                                     '2'
'TXXX:replaygain_track_gain'                        '+2.82 dB'
'TXXX:replaygain_track_peak'                        '0.389200'

========================== row from database ==========================
                                              'id'  1507135
                                            'path'  /data/Music/Bulk/00blues-jazz-exotica-oldies-country/00oldiepop/1937/Harry Roy - Harry Roy Stage Show Part 4 - Black Eyes & That_s A Plenty 2-9-1937.mp3
                                         'working'  None
                                         'bitrate'  160
                                    'duration_sec'  211
                                           'genre'  prerock-band
                                        'filesize'  4236978
                                           'mtime'  1620560539
                                   'redo_metaread'  0
                                        'rest_str'   00blues jazz exotica oldies country 00oldiepop 1937 That_s 1937 prerock band
                                      'tag_artist'  Harry Roy
                                     'tag_release'  Parlophone F  932
                                       'tag_title'  Harry Roy Stage Show Part 4 - Black Eyes & That's A Plenty
                                             'bpm'  125.315
                                    'search_title'  '4':6 'a':12 'black':7 'eyes':8 'harry':1 'part':5 'plenty':13 'roy':2 's':10 'show':4 'stage':3 'that':9 'thats':11
                                   'search_artist'  'harry':1 'roy':2
                                  'search_release'  '932':3 'f':2 'parlophone':1
                                     'search_rest'  '00oldiepop':5 '1937':6 'band':10 'country':4 'exotica':2 'jazz':1 'oldies':3 'prerock':9 's':8 'that':7
                                    'search_combo'  '00oldiepop':23 '1937':24 '4':6A '932':18C 'a':12A 'band':28 'black':7A 'country':22 'exotica':20 'eyes':8A 'f':17C 'harry':1A,14B 'jazz':19 'oldies':21 'parlophone':16C 'part':5A 'plenty':13A 'prerock':27 'roy':2A,15B 's':10A,26 'show':4A 'stage':3A 'that':9A,25 'thats':11A
                                    'tag_tracknum'  None
                                      'num_images'  0
                                             'key'  7A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-2', 'Q-LOCALNESS-1', 'q-mixbeat-1', 'Q-PIANO-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-PLAY-2', 'q-bass-2', 'q-grit-1']
                                      'lastfmtags'  ['jazz', 'big band', 'british', 'swing']
                                        'tag_date'  1937
                                     'discogstags'  ['jazz']

============================== file details ==============================
                                           'mtime'  1620560539.351236  (2021-05-09 13:42:19)
                             'size'  4236978