======================== unified (from filesystem) ========================
                                         'bitrate'  '128.0'
                                        'duration'  '175'
                                          'artist'  'Ben Selvin'
                                     'text_people'  ''
                                         'release'  '20s and 30s popular'
                                           'title'  'MY SIN'
                                           'quals'  ("['Q-HAP-3', 'Q-LOCALNESS-1', 'Q-JZFKS-1', 'Q-UNU-1', 'Q-HHRNBTT-1', "
 "'Q-OLDST-1', 'q-syn-1', 'q-bass-2', 'q-busy-3', 'q-grit-1', 'q-play-2', "
 "'q-chart-2', 'q-drums-1', 'q-other-4', 'q-piano-1', 'q-vocals-3', "
 "'q-mixbeat-1']")
                                      'lastfmtags'  "['jazz classics', 'all', 'swing', 'oldies', 'big band swing']"
                                     'discogstags'  "['jazz']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  ''
                                      'tracktotal'  ''
                                            'date'  '1929'
                                        'comments'  ''
                                           'genre'  'prerock-band'
                                             'bpm'  '94.813'
                                             'key'  '8A'
                                        'acoustid'  ''
rest: ''

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

'APIC:'                                             type PictureType.COVER_FRONT (Cover (front)) b''
                                     
'PRIV:AverageLevel:\x02\x1b\x00\x00'                PRIV(owner='AverageLevel', data=b'\x02\x1b\x00\x00')
'PRIV:PeakValue:þ\x7f\x00\x00'                      PRIV(owner='PeakValue', data=b'\xfe\x7f\x00\x00')
'TALB' (Album/Movie/Show title)                     '20s and 30s popular'
'TBPM' (BPM (beats per minute))                     '94.813'
'TCON' (Content type, a.k.a. Genre)                 'prerock-band'
'TDRC' (Recording time)                             '1929'
'TIT2' (Title/songname/content description)         'MY SIN'
'TKEY' (Initial key)                                '8A'
'TLEN' (Length)                                     '175393'
'TPE1' (Lead performer(s)/Soloist(s))               'Ben Selvin'
'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 classics', 'all', 'swing', 'oldies', 'big band swing']
'TXXX:q-bass'                                       '2'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '2'
'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'                        '+1.49 dB'
'TXXX:replaygain_track_peak'                        '0.355168'

========================== row from database ==========================
                                              'id'  1496308
                                            'path'  /data/Music/Bulk/00blues-jazz-exotica-oldies-country/00oldiepop/1920s and 1930s popular/Ben Selvin_s Knickerbockers - My Sin (1929) (Columbia 1800 D).mp3
                                         'working'  None
                                         'bitrate'  128
                                    'duration_sec'  175
                                           'genre'  prerock-band
                                        'filesize'  2820096
                                           'mtime'  1620559754
                                   'redo_metaread'  0
                                        'rest_str'   00blues jazz exotica oldies country 00oldiepop 1920s 1930s Selvin_s Knickerbockers My Sin (1929) (Columbia 1800 D) prerock band
                                      'tag_artist'  Ben Selvin
                                     'tag_release'  20s and 30s popular
                                       'tag_title'  MY SIN
                                             'bpm'  94.813
                                    'search_title'  'my':1 'sin':2
                                   'search_artist'  'ben':1 'selvin':2
                                  'search_release'  '20s':1 '30s':3 'and':2 'popular':4
                                     'search_rest'  '00oldiepop':5 '1800':17 '1920s':6 '1929':13,14 '1930s':7 'band':21 'columbia':15,16 'country':4 'd':18,19 'exotica':2 'jazz':1 'knickerbockers':10 'my':11 'oldies':3 'prerock':20 's':9 'selvin':8 'sin':12
                                    'search_combo'  '00oldiepop':13 '1800':25 '1920s':14 '1929':21,22 '1930s':15 '20s':5C '30s':7C 'and':6C 'band':29 'ben':3B 'columbia':23,24 'country':12 'd':26,27 'exotica':10 'jazz':9 'knickerbockers':18 'my':1A,19 'oldies':11 'popular':8C 'prerock':28 's':17 'selvin':4B,16 'sin':2A,20
                                    'tag_tracknum'  None
                                      'num_images'  1
                                             'key'  8A
                                           '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-2', 'q-other-4', 'Q-HAP-3', 'q-bass-2', 'q-grit-1']
                                      'lastfmtags'  ['jazz classics', 'all', 'swing', 'oldies', 'big band swing']
                                        'tag_date'  1929
                                     'discogstags'  ['jazz']

============================== file details ==============================
                                           'mtime'  1620559753.627322  (2021-05-09 13:29:13)
                             'size'  2820096