======================== unified (from filesystem) ========================
                                         'bitrate'  '171.958'
                                        'duration'  '207'
                                          'artist'  'Art Lessing'
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                                         'release'  'Lectures'
                                           'title'  'When It Ends'
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                                      'lastfmtags'  "['funky', 'trippy', 'bizarre', 'experimental', 'minimal']"
                                     'discogstags'  "['rock']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
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                                      'tracktotal'  '18'
                                            'date'  '2010'
                                        'comments'  ''
                                           'genre'  'electronic-experimental-psych'
                                             'bpm'  '126.8'
                                             'key'  '4A'
                                        'acoustid'  ''
rest: ''

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

'APIC:'                                             type PictureType.COVER_FRONT (Cover (front)) b''
                                     
'TALB' (Album/Movie/Show title)                     'Lectures'
'TBPM' (BPM (beats per minute))                     '126.8'
'TCON' (Content type, a.k.a. Genre)                 'electronic-experimental-psych'
'TDRC' (Recording time)                             '2010'
'TIT2' (Title/songname/content description)         'When It Ends'
'TKEY' (Initial key)                                '4A'
'TPE1' (Lead performer(s)/Soloist(s))               'Art Lessing'
'TPE2' (Band/orchestra/accompaniment)               'Art Lessing'
'TPOS' (Part of a set)                              '1/1'
'TRCK' (Track number/Position in set)               '6/18'
'TXXX:Encoding Params'                              'vers'
'TXXX:Q-HAP'                                        '2'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '2'
'TXXX:Q-LOCALNESS'                                  '2'
'TXXX:Q-OLDST'                                      '2'
'TXXX:Q-UNU'                                        '2'
'TXXX:UFIDhttp://www.cddb.com/id3/taginfo1.html'    '3CD3N18Q204454377U1181945198F87635FDA033560586FD7F7A7P0'
'TXXX:discogstags'                                  'rock'
'TXXX:iTunes_CDDB_IDs'                              '18++'
'TXXX:lastfmtags'                                   ['funky', 'trippy', 'bizarre', 'experimental', 'minimal']
'TXXX:q-bass'                                       '2'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '1'
'TXXX:q-drums'                                      '3'
'TXXX:q-grit'                                       '2'
'TXXX:q-mixbeat'                                    '2'
'TXXX:q-other'                                      '4'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '2'
'TXXX:q-syn'                                        '2'
'TXXX:q-vocals'                                     '1'
'TXXX:replaygain_track_gain'                        '-0.89 dB'
'TXXX:replaygain_track_peak'                        '0.528266'
'TXXX:tempo'                                        '00000 BPM'

========================== row from database ==========================
                                              'id'  1372884
                                            'path'  /data/Music/Bulk/00exnnpjpsprgttidm/Art Lessing - Lectures/06 When It Ends.mp3
                                         'working'  None
                                         'bitrate'  172
                                    'duration_sec'  207
                                           'genre'  electronic-experimental-psych
                                        'filesize'  6730428
                                           'mtime'  1637329299
                                   'redo_metaread'  0
                                        'rest_str'   00exnnpjpsprgttidm 06 electronic experimental psych
                                      'tag_artist'  Art Lessing
                                     'tag_release'  Lectures
                                       'tag_title'  When It Ends
                                             'bpm'  126.8
                                    'search_title'  'ends':3 'it':2 'when':1
                                   'search_artist'  'art':1 'lessing':2
                                  'search_release'  'lectures':1
                                     'search_rest'  'electronic':1 'experimental':2 'psych':3
                                    'search_combo'  'art':4B 'electronic':7 'ends':3A 'experimental':8 'it':2A 'lectures':6C 'lessing':5B 'psych':9 'when':1A
                                    'tag_tracknum'  6
                                      'num_images'  1
                                             'key'  4A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-1', 'Q-LOCALNESS-2', 'q-piano-1', 'q-mixbeat-2', 'q-play-2', 'Q-OLDST-2', 'Q-UNU-2', 'Q-JZFKS-2', 'q-busy-3', 'q-drums-3', 'q-syn-2', 'q-chart-1', 'q-other-4', 'Q-HAP-2', 'q-bass-2', 'q-grit-2']
                                      'lastfmtags'  ['funky', 'trippy', 'bizarre', 'experimental', 'minimal']
                                        'tag_date'  2010
                                     'discogstags'  ['rock']

============================== file details ==============================
                                           'mtime'  1637329299.395529  (2021-11-19 14:41:39)
                             'size'  6730428