======================== unified (from filesystem) ========================
                                         'bitrate'  '127.706'
                                        'duration'  '165'
                                          'artist'  'Arthur Fields, University Six'
                                     'text_people'  ''
                                         'release'  '20s and 30s popular'
                                           'title'  'C-O-N-S-T-A-N-T-I-N-O-P-L-E 1928'
                                           'quals'  ("['Q-HAP-3', 'Q-JZFKS-1', 'Q-LOCALNESS-1', 'Q-UNU-1', 'Q-HHRNBTT-1', "
 "'Q-OLDST-1', 'q-syn-1', 'Q-PLAY-2', 'q-bass-1', 'q-busy-2', 'q-grit-1', "
 "'Q-PIANO-2', 'q-chart-2', 'q-drums-1', 'q-other-4', 'q-vocals-3', "
 "'q-mixbeat-1']")
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  ''
                                      'tracktotal'  ''
                                            'date'  '1928'
                                        'comments'  ''
                                           'genre'  'prerock-unsorted'
                                             'bpm'  '123.032'
                                             'key'  '8A'
                                        'acoustid'  ''
rest: ''

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

'APIC:'                                             type PictureType.COVER_FRONT (Cover (front)) b''
                                     
'PRIV:AverageLevel:R\x13\x00\x00'                   PRIV(owner='AverageLevel', data=b'R\x13\x00\x00')
'PRIV:PeakValue:sz\x00\x00'                         PRIV(owner='PeakValue', data=b'sz\x00\x00')
'TALB' (Album/Movie/Show title)                     '20s and 30s popular'
'TBPM' (BPM (beats per minute))                     '123.032'
'TCON' (Content type, a.k.a. Genre)                 'prerock-unsorted'
'TDRC' (Recording time)                             '1928'
'TIT2' (Title/songname/content description)         'C-O-N-S-T-A-N-T-I-N-O-P-L-E 1928'
'TKEY' (Initial key)                                '8A'
'TPE1' (Lead performer(s)/Soloist(s))               'Arthur Fields, University Six'
'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:q-bass'                                       '1'
'TXXX:q-busy'                                       '2'
'TXXX:q-chart'                                      '2'
'TXXX:q-drums'                                      '1'
'TXXX:q-grit'                                       '1'
'TXXX:q-mixbeat'                                    '1'
'TXXX:q-other'                                      '4'
'TXXX:q-syn'                                        '1'
'TXXX:q-vocals'                                     '3'
'TXXX:replaygain_track_gain'                        '+1.27 dB'
'TXXX:replaygain_track_peak'                        '0.478329'

========================== row from database ==========================
                                              'id'  1142939
                                            'path'  /data/Music/Bulk/00blues-jazz-exotica-oldies-country/00oldiepop/1920s and 1930s popular/Arthur Fields, University Six - C-O-N-S-T-A-N-T-I-N-O-P-L-E 1928.mp3
                                         'working'  None
                                         'bitrate'  127
                                    'duration_sec'  165
                                           'genre'  prerock-unsorted
                                        'filesize'  2650493
                                           'mtime'  1621697845
                                   'redo_metaread'  0
                                        'rest_str'   00blues jazz exotica oldies country 00oldiepop 1920s 1930s prerock unsorted
                                      'tag_artist'  Arthur Fields, University Six
                                     'tag_release'  20s and 30s popular
                                       'tag_title'  C-O-N-S-T-A-N-T-I-N-O-P-L-E 1928
                                             'bpm'  123.032
                                    'search_title'  '1928':16 'a':6 'c':1 'constantinople':15 'e':14 'i':9 'l':13 'n':3,7,10 'o':2,11 'p':12 's':4 't':5,8
                                   'search_artist'  'arthur':1 'fields':2,3 'six':5 'university':4
                                  'search_release'  '20s':1 '30s':3 'and':2 'popular':4
                                     'search_rest'  '00oldiepop':5 '1920s':6 '1930s':7 'country':4 'exotica':2 'jazz':1 'oldies':3 'prerock':8 'unsorted':9
                                    'search_combo'  '00oldiepop':30 '1920s':31 '1928':16A '1930s':32 '20s':22C '30s':24C 'a':6A 'and':23C 'arthur':17B 'c':1A 'constantinople':15A 'country':29 'e':14A 'exotica':27 'fields':18B,19B 'i':9A 'jazz':26 'l':13A 'n':3A,7A,10A 'o':2A,11A 'oldies':28 'p':12A 'popular':25C 'prerock':33 's':4A 'six':21B 't':5A,8A 'university':20B 'unsorted':34
                                    'tag_tracknum'  None
                                      'num_images'  1
                                             'key'  8A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-3', 'Q-LOCALNESS-1', 'q-mixbeat-1', 'Q-PIANO-2', 'Q-OLDST-1', 'Q-UNU-1', 'Q-JZFKS-1', 'q-busy-2', 'q-drums-1', 'q-syn-1', 'q-chart-2', 'q-other-4', 'Q-HAP-3', 'Q-PLAY-2', 'q-bass-1', 'q-grit-1']
                                      'lastfmtags'  []
                                        'tag_date'  1928
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1621697844.8897188  (2021-05-22 17:37:24)
                             'size'  2650493