======================== unified (from filesystem) ========================
                                         'bitrate'  '256.0'
                                        'duration'  '28'
                                          'artist'  "2 many dj's"
                                     'text_people'  ''
                                         'release'  ''
                                           'title'  'marrs - pump up the volume'
                                           'quals'  ("['Q-HAP-3', 'Q-JZFKS-1', 'Q-HHRNBTT-1', 'Q-LOCALNESS-1', 'Q-OLDST-3', "
 "'Q-UNU-1', 'q-syn-3', 'q-bass-4', 'q-busy-3', 'q-grit-2', 'q-play-2', "
 "'q-chart-2', 'q-drums-4', 'q-other-2', 'q-piano-1', 'q-vocals-1', "
 "'q-mixbeat-3']")
                                      'lastfmtags'  "['dance', 'electronica', 'mashup', 'electro', 'electronic']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  ''
                                      'tracktotal'  ''
                                            'date'  '2000'
                                        'comments'  ''
                                           'genre'  'electronic-generic or radio-dance'
                                             'bpm'  '116.924'
                                             'key'  '9A'
                                        'acoustid'  ''
rest: ''

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

'TBPM' (BPM (beats per minute))                     '116.924'
'TCON' (Content type, a.k.a. Genre)                 'electronic-generic or radio-dance'
'TDRC' (Recording time)                             '2000'
'TIT2' (Title/songname/content description)         'marrs - pump up the volume'
'TKEY' (Initial key)                                '9A'
'TPE1' (Lead performer(s)/Soloist(s))               "2 many dj's"
'TXXX:Mp3gain_minmax'                               '134,185'
'TXXX:Mp3gain_undo'                                 '+006,+006,N'
'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:lastfmtags'                                   ['dance', 'electronica', 'mashup', 'electro', 'electronic']
'TXXX:q-bass'                                       '4'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '2'
'TXXX:q-drums'                                      '4'
'TXXX:q-grit'                                       '2'
'TXXX:q-mixbeat'                                    '3'
'TXXX:q-other'                                      '2'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '2'
'TXXX:q-syn'                                        '3'
'TXXX:q-vocals'                                     '1'
'TXXX:replaygain_track_gain'                        '-0.48 dB'
'TXXX:replaygain_track_peak'                        '0.372690'

========================== row from database ==========================
                                              'id'  1530723
                                            'path'  /data/Music/Bulk/00poprockelectronic-generic-dance-trapbeat/2 Many DJ_s/2 many dj_s - marrs - pump up the volume.mp3
                                         'working'  None
                                         'bitrate'  256
                                    'duration_sec'  28
                                           'genre'  electronic-generic or radio-dance
                                        'filesize'  923554
                                           'mtime'  1621695821
                                   'redo_metaread'  0
                                        'rest_str'   00poprockelectronic generic dance trapbeat Many DJ_s dj_s electronic generic or radio dance
                                      'tag_artist'  2 many dj's
                                     'tag_release'  None
                                       'tag_title'  marrs - pump up the volume
                                             'bpm'  116.924
                                    'search_title'  'marrs':1 'pump':2 'the':4 'up':3 'volume':5
                                   'search_artist'  '2':1 'dj':3 'djs':5 'many':2 's':4
                                  'search_release'  
                                     'search_rest'  '00poprockelectronic':1 'dance':3 'dj':6 'electronic':8 'generic':2 'many':5 'or':9 'radio':10 's':7 'trapbeat':4
                                    'search_combo'  '00poprockelectronic':11 '2':6B 'dance':13 'dj':8B,16 'djs':10B 'electronic':18 'generic':12 'many':7B,15 'marrs':1A 'or':19 'pump':2A 'radio':20 's':9B,17 'the':4A 'trapbeat':14 'up':3A 'volume':5A
                                    'tag_tracknum'  None
                                      'num_images'  0
                                             'key'  9A
                                           '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-4', 'q-syn-3', 'q-chart-2', 'q-other-2', 'Q-HAP-3', 'q-bass-4', 'q-grit-2']
                                      'lastfmtags'  ['dance', 'electronica', 'mashup', 'electro', 'electronic']
                                        'tag_date'  2000
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1621695820.5306296  (2021-05-22 17:03:40)
                             'size'  923554