======================== unified (from filesystem) ========================
                                         'bitrate'  '128.0'
                                        'duration'  '137'
                                          'artist'  'the soggy bottom boys'
                                     'text_people'  ''
                                         'release'  'oh brother where art thou'
                                           'title'  'candy mountain'
                                           'quals'  ("['Q-UNU-1', 'Q-JZFKS-1', 'Q-HHRNBTT-1', 'Q-LOCALNESS-2', 'Q-OLDST-1', "
 "'q-syn-2', 'q-bass-1', 'q-busy-3', 'q-grit-2', 'q-play-2', 'q-chart-3', "
 "'q-drums-1', 'q-other-3', 'q-piano-1', 'q-vocals-4', 'q-mixbeat-1']")
                                      'lastfmtags'  "['soundtrack', 'country', 'bluegrass', 'americana', 'folk']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  ''
                                      'tracktotal'  ''
                                            'date'  ''
                                        'comments'  ''
                                           'genre'  'ifs-unsorted'
                                             'bpm'  '92.985'
                                             'key'  '8A'
                                        'acoustid'  ''
rest: ''

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

'COMM:ID3v1 Comment:XXX'                            ' 00000274 00000265 0000233C 00'
'COMM:iTunNORM:eng'                                 (' 00000274 00000265 0000233C 0000231E 0000447B 0000447B 00007E10 00007D49 '
 '000160BE 0001B95C')
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'TALB' (Album/Movie/Show title)                     'oh brother where art thou'
'TBPM' (BPM (beats per minute))                     '92.985'
'TCON' (Content type, a.k.a. Genre)                 'ifs-unsorted'
'TIT2' (Title/songname/content description)         'candy mountain'
'TKEY' (Initial key)                                '8A'
'TPE1' (Lead performer(s)/Soloist(s))               'the soggy bottom boys'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '1'
'TXXX:Q-LOCALNESS'                                  '2'
'TXXX:Q-OLDST'                                      '1'
'TXXX:Q-UNU'                                        '1'
'TXXX:lastfmtags'                                   ['soundtrack', 'country', 'bluegrass', 'americana', 'folk']
'TXXX:q-bass'                                       '1'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '3'
'TXXX:q-drums'                                      '1'
'TXXX:q-grit'                                       '2'
'TXXX:q-mixbeat'                                    '1'
'TXXX:q-other'                                      '3'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '2'
'TXXX:q-syn'                                        '2'
'TXXX:q-vocals'                                     '4'
'TXXX:replaygain_track_gain'                        '+2.83 dB'
'TXXX:replaygain_track_peak'                        '0.585610'

========================== row from database ==========================
                                              'id'  1306986
                                            'path'  /data/Music/Bulk/00poprockelectronic/Unsorted/[loose files]/the soggy bottom boys - oh brother where art thou - big rock candy mountain.mp3
                                         'working'  None
                                         'bitrate'  128
                                    'duration_sec'  137
                                           'genre'  ifs-unsorted
                                        'filesize'  2209523
                                           'mtime'  1620573222
                                   'redo_metaread'  0
                                        'rest_str'   00poprockelectronic Unsorted [loose files] big rock ifs unsorted
                                      'tag_artist'  the soggy bottom boys
                                     'tag_release'  oh brother where art thou
                                       'tag_title'  candy mountain
                                             'bpm'  92.985
                                    'search_title'  'candy':1 'mountain':2
                                   'search_artist'  'bottom':3 'boys':4 'soggy':2 'the':1
                                  'search_release'  'art':4 'brother':2 'oh':1 'thou':5 'where':3
                                     'search_rest'  '00poprockelectronic':1 'big':7 'files':5,6 'ifs':9 'loose':3,4 'rock':8 'unsorted':2
                                    'search_combo'  '00poprockelectronic':12 'art':10C 'big':18 'bottom':5B 'boys':6B 'brother':8C 'candy':1A 'files':16,17 'ifs':20 'loose':14,15 'mountain':2A 'oh':7C 'rock':19 'soggy':4B 'the':3B 'thou':11C 'unsorted':13 'where':9C
                                    'tag_tracknum'  None
                                      'num_images'  0
                                             'key'  8A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-4', 'Q-LOCALNESS-2', '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-2', 'q-chart-3', 'q-other-3', 'q-bass-1', 'q-grit-2']
                                      'lastfmtags'  ['soundtrack', 'country', 'bluegrass', 'americana', 'folk']
                                        'tag_date'  
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1620573221.9699147  (2021-05-09 17:13:41)
                             'size'  2209523