======================== unified (from filesystem) ========================
                                         'bitrate'  '128.0'
                                        'duration'  '157'
                                          'artist'  'Grandpa Jones'
                                     'text_people'  ''
                                         'release'  ''
                                           'title'  'Grandpa Boogie'
                                           'quals'  ("['Q-UNU-1', 'Q-JZFKS-1', 'Q-LOCALNESS-2', 'Q-HHRNBTT-1', 'Q-OLDST-1', "
 "'q-syn-1', 'q-bass-1', 'q-busy-3', 'q-grit-2', 'q-play-2', 'q-chart-2', "
 "'q-drums-1', 'q-other-2', 'q-piano-1', 'q-vocals-4', 'q-mixbeat-1']")
                                      'lastfmtags'  "['country', 'bluegrass', 'banjo', 'old timey', 'classic country']"
                                     'discogstags'  "['folk, world, & country']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  ''
                                      'tracktotal'  ''
                                            'date'  ''
                                        'comments'  ''
                                           'genre'  'loc-unsorted'
                                             'bpm'  '119.829'
                                             'key'  '11B'
                                        'acoustid'  ''
rest: ''

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

'TBPM' (BPM (beats per minute))                     '119.829'
'TCON' (Content type, a.k.a. Genre)                 'loc-unsorted'
'TIT2' (Title/songname/content description)         'Grandpa Boogie'
'TKEY' (Initial key)                                '11B'
'TPE1' (Lead performer(s)/Soloist(s))               'Grandpa Jones'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '1'
'TXXX:Q-LOCALNESS'                                  '2'
'TXXX:Q-OLDST'                                      '1'
'TXXX:Q-UNU'                                        '1'
'TXXX:discogstags'                                  'folk, world, & country'
'TXXX:lastfmtags'                                   ['country', 'bluegrass', 'banjo', 'old timey', 'classic country']
'TXXX:q-bass'                                       '1'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '2'
'TXXX:q-drums'                                      '1'
'TXXX:q-grit'                                       '2'
'TXXX:q-mixbeat'                                    '1'
'TXXX:q-other'                                      '2'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '2'
'TXXX:q-syn'                                        '1'
'TXXX:q-vocals'                                     '4'
'TXXX:replaygain_track_gain'                        '+1.30 dB'
'TXXX:replaygain_track_peak'                        '0.391353'

========================== row from database ==========================
                                              'id'  1538976
                                            'path'  /data/Music/Bulk/00localcharacter/00mid-north-europe/Grampa Jones - I_m my own Grandpa.mp3
                                         'working'  None
                                         'bitrate'  128
                                    'duration_sec'  157
                                           'genre'  loc-unsorted
                                        'filesize'  2531320
                                           'mtime'  1620400471
                                   'redo_metaread'  0
                                        'rest_str'   00localcharacter 00mid north europe Grampa I_m my own loc unsorted
                                      'tag_artist'  Grandpa Jones
                                     'tag_release'  None
                                       'tag_title'  Grandpa Boogie
                                             'bpm'  119.829
                                    'search_title'  'boogie':2 'grandpa':1
                                   'search_artist'  'grandpa':1 'jones':2
                                  'search_release'  
                                     'search_rest'  '00mid':1 'europe':3 'grampa':4 'i':5 'loc':9 'm':6 'my':7 'north':2 'own':8 'unsorted':10
                                    'search_combo'  '00mid':5 'boogie':2A 'europe':7 'grampa':8 'grandpa':1A,3B 'i':9 'jones':4B 'loc':13 'm':10 'my':11 'north':6 'own':12 'unsorted':14
                                    'tag_tracknum'  None
                                      'num_images'  0
                                             'key'  11B
                                           'quals'  ['Q-UNU-1', 'Q-JZFKS-1', 'Q-LOCALNESS-2', 'Q-HHRNBTT-1', 'Q-OLDST-1', 'q-syn-1', 'q-bass-1', 'q-busy-3', 'q-grit-2', 'q-play-2', 'q-chart-2', 'q-drums-1', 'q-other-2', 'q-piano-1', 'q-vocals-4', 'q-mixbeat-1']
                                      'lastfmtags'  ['country', 'bluegrass', 'banjo', 'old timey', 'classic country']
                                        'tag_date'  
                                     'discogstags'  ['folk, world, & country']

============================== file details ==============================
                                           'mtime'  1620400471.0966523  (2021-05-07 17:14:31)
                             'size'  2531320