======================== unified (from filesystem) ========================
                                         'bitrate'  '128.0'
                                        'duration'  '103'
                                          'artist'  'Blue Man Group'
                                     'text_people'  ''
                                         'release'  ''
                                           'title'  'Big Pipe Drum'
                                           'quals'  ("['Q-JZFKS-1', 'Q-HHRNBTT-1', 'Q-LOCALNESS-1', 'Q-OLDST-3', 'Q-UNU-1', "
 "'q-syn-3', 'q-bass-1', 'q-busy-3', 'q-grit-2', 'q-play-2', 'q-chart-3', "
 "'q-drums-3', 'q-other-4', 'q-piano-1', 'q-vocals-1', 'q-mixbeat-3']")
                                      'lastfmtags'  "['instrumental', 'electronica', 'electronic', 'experimental', 'rock']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  ''
                                      'tracktotal'  ''
                                            'date'  '2000'
                                        'comments'  ''
                                           'genre'  'electronic-generic or radio-dance'
                                             'bpm'  '120.614'
                                             'key'  '1A'
                                        'acoustid'  ''
rest: ''

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

'TBPM' (BPM (beats per minute))                     '120.614'
'TCON' (Content type, a.k.a. Genre)                 'electronic-generic or radio-dance'
'TDRC' (Recording time)                             '2000'
'TIT2' (Title/songname/content description)         'Big Pipe Drum'
'TKEY' (Initial key)                                '1A'
'TPE1' (Lead performer(s)/Soloist(s))               'Blue Man Group'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '1'
'TXXX:Q-LOCALNESS'                                  '1'
'TXXX:Q-OLDST'                                      '3'
'TXXX:Q-UNU'                                        '1'
'TXXX:lastfmtags'                                   ['instrumental', 'electronica', 'electronic', 'experimental', 'rock']
'TXXX:q-bass'                                       '1'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '3'
'TXXX:q-drums'                                      '3'
'TXXX:q-grit'                                       '2'
'TXXX:q-mixbeat'                                    '3'
'TXXX:q-other'                                      '4'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '2'
'TXXX:q-syn'                                        '3'
'TXXX:q-vocals'                                     '1'
'TXXX:replaygain_track_gain'                        '+1.34 dB'
'TXXX:replaygain_track_peak'                        '0.459649'

========================== row from database ==========================
                                              'id'  1456615
                                            'path'  /data/Music/Bulk/00poprockelectronic-generic-dance-trapbeat/00mixable/Blue Man Group/Blue Man Group - Pipe Drum.mp3
                                         'working'  None
                                         'bitrate'  128
                                    'duration_sec'  103
                                           'genre'  electronic-generic or radio-dance
                                        'filesize'  1657693
                                           'mtime'  1620558218
                                   'redo_metaread'  0
                                        'rest_str'   00poprockelectronic generic dance trapbeat 00mixable electronic generic or radio dance
                                      'tag_artist'  Blue Man Group
                                     'tag_release'  None
                                       'tag_title'  Big Pipe Drum
                                             'bpm'  120.614
                                    'search_title'  'big':1 'drum':3 'pipe':2
                                   'search_artist'  'blue':1 'group':3 'man':2
                                  'search_release'  
                                     'search_rest'  '00mixable':5 '00poprockelectronic':1 'dance':3 'electronic':6 'generic':2 'or':7 'radio':8 'trapbeat':4
                                    'search_combo'  '00mixable':11 '00poprockelectronic':7 'big':1A 'blue':4B 'dance':9 'drum':3A 'electronic':12 'generic':8 'group':6B 'man':5B 'or':13 'pipe':2A 'radio':14 'trapbeat':10
                                    'tag_tracknum'  None
                                      'num_images'  0
                                             'key'  1A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-1', 'Q-LOCALNESS-1', 'q-piano-1', 'q-mixbeat-3', 'q-play-2', 'Q-OLDST-3', 'Q-UNU-1', 'Q-JZFKS-1', 'q-busy-3', 'q-drums-3', 'q-syn-3', 'q-chart-3', 'q-other-4', 'q-bass-1', 'q-grit-2']
                                      'lastfmtags'  ['instrumental', 'electronica', 'electronic', 'experimental', 'rock']
                                        'tag_date'  2000
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1620558217.8058565  (2021-05-09 13:03:37)
                             'size'  1657693