======================== unified (from filesystem) ========================
                                         'bitrate'  '128.0'
                                        'duration'  '79'
                                          'artist'  'Shirley & Spinoza'
                                     'text_people'  ''
                                         'release'  'Shirley & Spinoza'
                                           'title'  'Optigan PromoTape1972 01 BigBand'
                                           'quals'  ("['Q-JZFKS-1', 'Q-LOCALNESS-1', 'Q-UNU-2', 'Q-OLDST-2', 'Q-HHRNBTT-1', "
 "'q-syn-2', 'q-bass-2', 'q-busy-3', 'q-grit-2', 'q-play-3', 'q-chart-1', "
 "'q-drums-1', 'q-other-3', 'q-piano-1', 'q-vocals-4', 'q-mixbeat-1']")
                                      'lastfmtags'  "['eclectic', 'collage music', 'tape music', 'avant garde', 'oldies']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  ''
                                      'tracktotal'  ''
                                            'date'  '1972'
                                        'comments'  ''
                                           'genre'  'set-pl-shirleyspinoza;set-pl-mor'
                                             'bpm'  '142.008'
                                             'key'  '1A'
                                        'acoustid'  ''
rest: ''

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

'TALB' (Album/Movie/Show title)                     'Shirley & Spinoza'
'TBPM' (BPM (beats per minute))                     '142.008'
'TCON' (Content type, a.k.a. Genre)                 ['set-pl-shirleyspinoza', 'set-pl-mor']
'TDRC' (Recording time)                             '1972'
'TIT2' (Title/songname/content description)         'Optigan PromoTape1972 01 BigBand'
'TKEY' (Initial key)                                '1A'
'TPE1' (Lead performer(s)/Soloist(s))               'Shirley & Spinoza'
'TPE2' (Band/orchestra/accompaniment)               'Various Artists'
'TXXX:Mp3gain_minmax'                               '031,206'
'TXXX:Mp3gain_undo'                                 '+004,+004,N'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '1'
'TXXX:Q-LOCALNESS'                                  '1'
'TXXX:Q-OLDST'                                      '2'
'TXXX:Q-UNU'                                        '2'
'TXXX:Sortunder'                                    'o'
'TXXX:lastfmtags'                                   ['eclectic', 'collage music', 'tape music', 'avant garde', 'oldies']
'TXXX:q-bass'                                       '2'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '1'
'TXXX:q-drums'                                      '1'
'TXXX:q-grit'                                       '2'
'TXXX:q-mixbeat'                                    '1'
'TXXX:q-other'                                      '3'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '3'
'TXXX:q-syn'                                        '2'
'TXXX:q-vocals'                                     '4'
'TXXX:replaygain_track_gain'                        '+0.29 dB'
'TXXX:replaygain_track_peak'                        '0.500151'

========================== row from database ==========================
                                              'id'  896902
                                            'path'  /data/Music/Bulk/sns/Optigan_PromoTape1972_01_BigBand_0002.mp3
                                         'working'  None
                                         'bitrate'  128
                                    'duration_sec'  79
                                           'genre'  set-pl-shirleyspinoza;set-pl-mor
                                        'filesize'  1272088
                                           'mtime'  1620356918
                                   'redo_metaread'  0
                                        'rest_str'   sns Optigan_PromoTape1972_01_BigBand_0002 set pl shirleyspinoza;set pl mor
                                      'tag_artist'  Shirley & Spinoza
                                     'tag_release'  Shirley & Spinoza
                                       'tag_title'  Optigan PromoTape1972 01 BigBand
                                             'bpm'  142.008
                                    'search_title'  'band':7 'big':6 'bigband':3 'optigan':1 'promo':4 'promotape1972':2 'tape1972':5
                                   'search_artist'  'shirley':1 'spinoza':2
                                  'search_release'  'shirley':1 'spinoza':2
                                     'search_rest'  '0002':6,20 '01':4,17 'band':19 'big':18 'bigband':5 'mor':13 'optigan':2,14 'pl':8 'promo':15 'promotape1972':3 'set':7,10,12 'shirleyspinoza':9,11 'sns':1 'tape1972':16
                                    'search_combo'  '0002':17,31 '01':15,28 'band':7A,30 'big':6A,29 'bigband':3A,16 'mor':24 'optigan':1A,13,25 'pl':19 'promo':4A,26 'promotape1972':2A,14 'set':18,21,23 'shirley':8B,10C 'shirleyspinoza':20,22 'sns':12 'spinoza':9B,11C 'tape1972':5A,27
                                    'tag_tracknum'  None
                                      'num_images'  0
                                             'key'  1A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-4', 'Q-LOCALNESS-1', 'q-piano-1', 'q-mixbeat-1', 'q-play-3', 'Q-OLDST-2', 'Q-UNU-2', 'Q-JZFKS-1', 'q-busy-3', 'q-drums-1', 'q-syn-2', 'q-chart-1', 'q-other-3', 'q-bass-2', 'q-grit-2']
                                      'lastfmtags'  ['eclectic', 'collage music', 'tape music', 'avant garde', 'oldies']
                                        'tag_date'  1972
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1620356917.9102795  (2021-05-07 05:08:37)
                             'size'  1272088