======================== unified (from filesystem) ========================
                                         'bitrate'  '128.0'
                                        'duration'  '242'
                                          'artist'  'The Aquabats'
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                                         'release'  'Myths, Legends, and Other Amazing Adventures, Volume 2'
                                           'title'  'I Fell Asleep on My Arm!'
                                           'quals'  "['q-bass-3', 'q-drums-4', 'q-other-3', 'q-piano-1', 'q-vocals-3']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '06'
                                      'tracktotal'  ''
                                            'date'  ''
                                        'comments'  ''
                                           'genre'  'rock,amusing'
                                             'bpm'  '139.7'
                                             'key'  '7A'
                                        'acoustid'  ''
rest: ''

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

'TALB' (Album/Movie/Show title)                     'Myths, Legends, and Other Amazing Adventures, Volume 2'
'TBPM' (BPM (beats per minute))                     '139.7'
'TCON' (Content type, a.k.a. Genre)                 'rock,amusing'
'TIT2' (Title/songname/content description)         'I Fell Asleep on My Arm!'
'TKEY' (Initial key)                                '7A'
'TPE1' (Lead performer(s)/Soloist(s))               'The Aquabats'
'TPE2' (Band/orchestra/accompaniment)               'The Aquabats'
'TRCK' (Track number/Position in set)               '06'
'TXXX:q-bass'                                       '3'
'TXXX:q-drums'                                      '4'
'TXXX:q-other'                                      '3'
'TXXX:q-piano'                                      '1'
'TXXX:q-vocals'                                     '3'
'TXXX:replaygain_track_gain'                        '-0.17 dB'
'TXXX:replaygain_track_peak'                        '0.406403'

========================== row from database ==========================
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                                            'path'  /data/Music/Other/PrevSet/[9amusing]/Aquabats/I Fell Asleep on My Arm!.mp3
                                         'working'  None
                                         'bitrate'  128
                                    'duration_sec'  242
                                           'genre'  rock,amusing
                                        'filesize'  3889370
                                           'mtime'  1662800445
                                   'redo_metaread'  0
                                        'rest_str'   PrevSet [9amusing] rock,amusing
                                      'tag_artist'  The Aquabats
                                     'tag_release'  Myths, Legends, and Other Amazing Adventures, Volume 2
                                       'tag_title'  I Fell Asleep on My Arm!
                                             'bpm'  139.7
                                    'search_title'  'arm':6 'asleep':3 'fell':2 'i':1 'my':5 'on':4
                                   'search_artist'  'aquabats':2 'the':1
                                  'search_release'  '2':11 'adventures':8,9 'amazing':7 'and':5 'legends':3,4 'myths':1,2 'other':6 'volume':10
                                     'search_rest'  '9amusing':2,3 'amusing':5,7 'prev':8 'prevset':1 'rock':4,6 'set':9
                                    'search_combo'  '2':19C '9amusing':21,22 'adventures':16C,17C 'amazing':15C 'amusing':24,26 'and':13C 'aquabats':8B 'arm':6A 'asleep':3A 'fell':2A 'i':1A 'legends':11C,12C 'my':5A 'myths':9C,10C 'on':4A 'other':14C 'prev':27 'prevset':20 'rock':23,25 'set':28 'the':7B 'volume':18C
                                    'tag_tracknum'  6
                                      'num_images'  0
                                             'key'  7A
                                           'quals'  ['q-bass-3', 'q-drums-4', 'q-other-3', 'q-piano-1', 'q-vocals-3']
                                      'lastfmtags'  []
                                        'tag_date'  
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1662800444.5922618  (2022-09-10 11:00:44)
                             'size'  3889370