======================== unified (from filesystem) ========================
                                         'bitrate'  '192.0'
                                        'duration'  '288'
                                          'artist'  'The Avett Brothers'
                                     'text_people'  ''
                                         'release'  'I And Love And You'
                                           'title'  'Head Full Of Doubt/Road Full O'
                                           'quals'  ("['Q-UNU-1', 'Q-JZFKS-1', 'Q-HHRNBTT-1', 'Q-LOCALNESS-2', 'Q-OLDST-1', "
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 "'q-chart-2', 'q-drums-3', 'q-other-2', 'q-vocals-3', 'q-mixbeat-2']")
                                      'lastfmtags'  "['americana', 'indie', 'country', 'bluegrass', 'alt country', 'folk']"
                                     'discogstags'  "['folk, world, & country', 'folk']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '3'
                                      'tracktotal'  ''
                                            'date'  '2009'
                                        'comments'  ''
                                           'genre'  'ifs-unsorted'
                                             'bpm'  '116.253'
                                             'key'  '9B'
                                        'acoustid'  ''
rest: ''

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

'COMM:ID3v1 Comment:XXX'                            '0'
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'TBPM' (BPM (beats per minute))                     '116.253'
'TCON' (Content type, a.k.a. Genre)                 'ifs-unsorted'
'TDRC' (Recording time)                             '2009'
'TIT2' (Title/songname/content description)         'Head Full Of Doubt/Road Full O'
'TKEY' (Initial key)                                '9B'
'TPE1' (Lead performer(s)/Soloist(s))               'The Avett Brothers'
'TRCK' (Track number/Position in set)               '3'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '1'
'TXXX:Q-LOCALNESS'                                  '2'
'TXXX:Q-OLDST'                                      '1'
'TXXX:Q-PIANO'                                      '3'
'TXXX:Q-UNU'                                        '1'
'TXXX:discogstags'                                  ['folk, world, & country', 'folk']
'TXXX:lastfmtags'                                   ['americana', 'indie', 'country', 'bluegrass', 'alt country', 'folk']
'TXXX:q-bass'                                       '3'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '2'
'TXXX:q-drums'                                      '3'
'TXXX:q-grit'                                       '2'
'TXXX:q-mixbeat'                                    '2'
'TXXX:q-other'                                      '2'
'TXXX:q-play'                                       '2'
'TXXX:q-syn'                                        '2'
'TXXX:q-vocals'                                     '3'
'TXXX:replaygain_track_gain'                        '+0.97 dB'
'TXXX:replaygain_track_peak'                        '0.389038'

========================== row from database ==========================
                                              'id'  1286332
                                            'path'  /data/Music/Bulk/00poprockelectronic/The Avett Brothers/03 Head Full Of Doubt_Road Full Of P.mp3
                                         'working'  None
                                         'bitrate'  192
                                    'duration_sec'  288
                                           'genre'  ifs-unsorted
                                        'filesize'  6915533
                                           'mtime'  1620572196
                                   'redo_metaread'  0
                                        'rest_str'   00poprockelectronic 03 Doubt_Road P ifs unsorted
                                      'tag_artist'  The Avett Brothers
                                     'tag_release'  I And Love And You
                                       'tag_title'  Head Full Of Doubt/Road Full O
                                             'bpm'  116.253
                                    'search_title'  'doubt':4 'doubtroad':6 'full':2 'head':1 'o':7 'of':3 'road':5
                                   'search_artist'  'avett':2 'brothers':3 'the':1
                                  'search_release'  'and':2 'i':1 'love':3 'you':4
                                     'search_rest'  '00poprockelectronic':1 'doubt':2 'ifs':5 'p':4 'road':3 'unsorted':6
                                    'search_combo'  '00poprockelectronic':15 'and':12C 'avett':9B 'brothers':10B 'doubt':4A,16 'doubtroad':6A 'full':2A 'head':1A 'i':11C 'ifs':19 'love':13C 'o':7A 'of':3A 'p':18 'road':5A,17 'the':8B 'unsorted':20 'you':14C
                                    'tag_tracknum'  3
                                      'num_images'  0
                                             'key'  9B
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-3', 'Q-LOCALNESS-2', 'q-mixbeat-2', 'Q-PIANO-3', 'q-play-2', 'Q-OLDST-1', 'Q-UNU-1', 'Q-JZFKS-1', 'q-busy-3', 'q-drums-3', 'q-syn-2', 'q-chart-2', 'q-other-2', 'q-bass-3', 'q-grit-2']
                                      'lastfmtags'  ['americana', 'indie', 'country', 'bluegrass', 'alt country', 'folk']
                                        'tag_date'  2009
                                     'discogstags'  ['folk, world, & country', 'folk']

============================== file details ==============================
                                           'mtime'  1620572196.370393  (2021-05-09 16:56:36)
                             'size'  6915533