======================== unified (from filesystem) ========================
                                         'bitrate'  '160.0'
                                        'duration'  '110'
                                          'artist'  'The Lancasters'
                                     'text_people'  ''
                                         'release'  'Murder on your ears'
                                           'title'  "Satan's Holiday"
                                           'quals'  ("['Q-HAP-3', 'Q-UNU-1', 'Q-JZFKS-1', 'q-syn-2', 'q-bass-4', 'q-busy-3', "
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 "'q-piano-1', 'q-vocals-1', 'Q-HHRNBTT-1', 'q-mixbeat-1', 'Q-LOCALNESS-1']")
                                      'lastfmtags'  "['oi', 'canadian', 'surf', 'surf rock', 'punk']"
                                     'discogstags'  "['surf', 'instrumental', 'rock']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '12'
                                      'tracktotal'  '49'
                                            'date'  ''
                                        'comments'  ''
                                           'genre'  'electronic-experimental-combinations'
                                             'bpm'  '145.8'
                                             'key'  '9B'
                                        'acoustid'  ''
rest: ''

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

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'TBPM' (BPM (beats per minute))                     '145.8'
'TCON' (Content type, a.k.a. Genre)                 'electronic-experimental-combinations'
'TENC' (Encoded by)                                 'iTunes 9.0.2'
'TIT2' (Title/songname/content description)         "Satan's Holiday"
'TKEY' (Initial key)                                '9B'
'TPE1' (Lead performer(s)/Soloist(s))               'The Lancasters'
'TPE2' (Band/orchestra/accompaniment)               'Various Artists'
'TRCK' (Track number/Position in set)               '12/49'
'TXXX:Q-HAP'                                        '3'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '1'
'TXXX:Q-LOCALNESS'                                  '1'
'TXXX:Q-OLDST'                                      '3'
'TXXX:Q-UNU'                                        '1'
'TXXX:discogstags'                                  ['surf', 'instrumental', 'rock']
'TXXX:lastfmtags'                                   ['oi', 'canadian', 'surf', 'surf rock', 'punk']
'TXXX:q-bass'                                       '4'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '2'
'TXXX:q-drums'                                      '3'
'TXXX:q-grit'                                       '2'
'TXXX:q-mixbeat'                                    '1'
'TXXX:q-other'                                      '3'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '2'
'TXXX:q-syn'                                        '2'
'TXXX:q-vocals'                                     '1'
'TXXX:replaygain_track_gain'                        '-0.93 dB'
'TXXX:replaygain_track_peak'                        '0.382478'

========================== row from database ==========================
                                              'id'  1499079
                                            'path'  /data/Music/Bulk/00exnnpjpsprgttidm/va - J.R. Williams - Murder On Your Ears/12 - The Lancasters - Satan_s Holiday.mp3
                                         'working'  None
                                         'bitrate'  160
                                    'duration_sec'  110
                                           'genre'  electronic-experimental-combinations
                                        'filesize'  2203262
                                           'mtime'  1620586871
                                   'redo_metaread'  0
                                        'rest_str'   00exnnpjpsprgttidm va J.R. Williams On Your Ears 12 Satan_s electronic experimental combinations
                                      'tag_artist'  The Lancasters
                                     'tag_release'  Murder on your ears
                                       'tag_title'  Satan's Holiday
                                             'bpm'  145.8
                                    'search_title'  'holiday':4 's':2 'satan':1 'satans':3
                                   'search_artist'  'lancasters':2 'the':1
                                  'search_release'  'ears':4 'murder':1 'on':2 'your':3
                                     'search_rest'  'combinations':13 'ears':8 'electronic':11 'experimental':12 'j':2 'jr':4 'on':6 'r':3 's':10 'satan':9 'va':1 'williams':5 'your':7
                                    'search_combo'  'combinations':23 'ears':10C,18 'electronic':21 'experimental':22 'holiday':4A 'j':12 'jr':14 'lancasters':6B 'murder':7C 'on':8C,16 'r':13 's':2A,20 'satan':1A,19 'satans':3A 'the':5B 'va':11 'williams':15 'your':9C,17
                                    'tag_tracknum'  12
                                      'num_images'  0
                                             'key'  9B
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-1', '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-3', 'q-syn-2', 'q-chart-2', 'q-other-3', 'Q-HAP-3', 'q-bass-4', 'q-grit-2']
                                      'lastfmtags'  ['oi', 'canadian', 'surf', 'surf rock', 'punk']
                                        'tag_date'  
                                     'discogstags'  ['surf', 'instrumental', 'rock']

============================== file details ==============================
                                           'mtime'  1620586871.0407703  (2021-05-09 21:01:11)
                             'size'  2203262