======================== unified (from filesystem) ========================
                                         'bitrate'  '192.0'
                                        'duration'  '205'
                                          'artist'  'The Mountain Goats'
                                     'text_people'  ''
                                         'release'  'Bitter Melon Farm'
                                           'title'  "No, I Can't"
                                           'quals'  ("['Q-HAP-2', 'Q-UNU-1', 'Q-OLDST-3', 'Q-LOCALNESS-1', 'Q-JZFKS-1', "
 "'Q-HHRNBTT-1', 'q-syn-2', 'q-bass-1', 'q-busy-3', 'q-grit-2', 'q-play-2', "
 "'q-chart-3', 'q-drums-1', 'q-other-4', 'q-piano-1', 'q-vocals-3', "
 "'q-mixbeat-1']")
                                      'lastfmtags'  "['indie', 'acoustic', 'lo fi', 'folk', 'pxs: loved']"
                                     'discogstags'  "['rock', 'folk, world, & country', 'alternative rock', 'lo-fi', 'indie rock']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '7'
                                      'tracktotal'  ''
                                            'date'  '1999'
                                        'comments'  ''
                                           'genre'  'ifs-songwriter-indie-unsorted'
                                             'bpm'  '117.9'
                                             'key'  '4A'
                                        'acoustid'  ''
rest: ''

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

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'TALB' (Album/Movie/Show title)                     'Bitter Melon Farm'
'TBPM' (BPM (beats per minute))                     '117.9'
'TCON' (Content type, a.k.a. Genre)                 'ifs-songwriter-indie-unsorted'
'TDRC' (Recording time)                             '1999'
'TIT2' (Title/songname/content description)         "No, I Can't"
'TKEY' (Initial key)                                '4A'
'TPE1' (Lead performer(s)/Soloist(s))               'The Mountain Goats'
'TRCK' (Track number/Position in set)               '7'
'TXXX:Q-HAP'                                        '2'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '1'
'TXXX:Q-LOCALNESS'                                  '1'
'TXXX:Q-OLDST'                                      '3'
'TXXX:Q-UNU'                                        '1'
'TXXX:discogstags'                                  ['rock', 'folk, world, & country', 'alternative rock', 'lo-fi', 'indie rock']
'TXXX:lastfmtags'                                   ['indie', 'acoustic', 'lo fi', 'folk', 'pxs: loved']
'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'                                      '4'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '2'
'TXXX:q-syn'                                        '2'
'TXXX:q-vocals'                                     '3'
'TXXX:replaygain_track_gain'                        '+1.26 dB'
'TXXX:replaygain_track_peak'                        '0.562865'

========================== row from database ==========================
                                              'id'  1512596
                                            'path'  /data/Music/Bulk/00poprockelectronic/The Mountain Goats/Bitter Melon Farm/07 no, i can_t.mp3
                                         'working'  None
                                         'bitrate'  192
                                    'duration_sec'  205
                                           'genre'  ifs-songwriter-indie-unsorted
                                        'filesize'  4936572
                                           'mtime'  1636402037
                                   'redo_metaread'  0
                                        'rest_str'   00poprockelectronic 07 no, can_t ifs songwriter indie unsorted
                                      'tag_artist'  The Mountain Goats
                                     'tag_release'  Bitter Melon Farm
                                       'tag_title'  No, I Can't
                                             'bpm'  117.9
                                    'search_title'  'can':4 'cant':6 'i':3 'no':1,2 't':5
                                   'search_artist'  'goats':3 'mountain':2 'the':1
                                  'search_release'  'bitter':1 'farm':3 'melon':2
                                     'search_rest'  '00poprockelectronic':1 'can':4 'ifs':6 'indie':8 'no':2,3 'songwriter':7 't':5 'unsorted':9
                                    'search_combo'  '00poprockelectronic':13 'bitter':10C 'can':4A,16 'cant':6A 'farm':12C 'goats':9B 'i':3A 'ifs':18 'indie':20 'melon':11C 'mountain':8B 'no':1A,2A,14,15 'songwriter':19 't':5A,17 'the':7B 'unsorted':21
                                    'tag_tracknum'  7
                                      'num_images'  0
                                             'key'  4A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-3', 'Q-LOCALNESS-1', 'q-piano-1', 'q-mixbeat-1', 'q-play-2', 'Q-OLDST-3', 'Q-UNU-1', 'Q-JZFKS-1', 'q-busy-3', 'q-drums-1', 'q-syn-2', 'q-chart-3', 'q-other-4', 'Q-HAP-2', 'q-bass-1', 'q-grit-2']
                                      'lastfmtags'  ['indie', 'acoustic', 'lo fi', 'folk', 'pxs: loved']
                                        'tag_date'  1999
                                     'discogstags'  ['rock', 'folk, world, & country', 'alternative rock', 'lo-fi', 'indie rock']

============================== file details ==============================
                                           'mtime'  1636402037.2635393  (2021-11-08 21:07:17)
                             'size'  4936572