======================== unified (from filesystem) ========================
                                         'bitrate'  '192.0'
                                        'duration'  '167'
                                          'artist'  'Faithless'
                                     'text_people'  ''
                                         'release'  ''
                                           'title'  'Mushrooms'
                                           'quals'  ("['Q-HAP-3', 'Q-UNU-1', 'Q-JZFKS-1', 'Q-LOCALNESS-1', 'Q-HHRNBTT-1', "
 "'Q-OLDST-3', 'q-syn-2', 'q-bass-4', 'q-busy-3', 'q-grit-2', 'q-play-3', "
 "'q-chart-4', 'q-drums-4', 'q-other-1', 'q-piano-1', 'q-vocals-1', "
 "'q-mixbeat-2']")
                                      'lastfmtags'  "['dance', 'trip hop', 'electronica', 'electronic', 'house']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '04'
                                      'tracktotal'  ''
                                            'date'  '2002'
                                        'comments'  ''
                                           'genre'  'electronic-trip hop or downtempo or acid jazz'
                                             'bpm'  '118.221'
                                             'key'  '8A'
                                        'acoustid'  ''
rest: ''

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

'TBPM' (BPM (beats per minute))                     '118.221'
'TCON' (Content type, a.k.a. Genre)                 'electronic-trip hop or downtempo or acid jazz'
'TDRC' (Recording time)                             '2002'
'TIT2' (Title/songname/content description)         'Mushrooms'
'TKEY' (Initial key)                                '8A'
'TPE1' (Lead performer(s)/Soloist(s))               'Faithless'
'TRCK' (Track number/Position in set)               '04'
'TXXX:Mp3gain_minmax'                               '141,189'
'TXXX:Mp3gain_undo'                                 '+001,+001,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', 'trip hop', 'electronica', 'electronic', 'house']
'TXXX:q-bass'                                       '4'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '4'
'TXXX:q-drums'                                      '4'
'TXXX:q-grit'                                       '2'
'TXXX:q-mixbeat'                                    '2'
'TXXX:q-other'                                      '1'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '3'
'TXXX:q-syn'                                        '2'
'TXXX:q-vocals'                                     '1'
'TXXX:replaygain_track_gain'                        '+0.98 dB'
'TXXX:replaygain_track_peak'                        '0.655340'

========================== row from database ==========================
                                              'id'  1349532
                                            'path'  /data/Music/Bulk/00poprockelectronic/Faithless/2002.feb.20 Back To Mine/04 - Mushrooms.mp3
                                         'working'  None
                                         'bitrate'  192
                                    'duration_sec'  167
                                           'genre'  electronic-trip hop or downtempo or acid jazz
                                        'filesize'  4011347
                                           'mtime'  1636911243
                                   'redo_metaread'  0
                                        'rest_str'   00poprockelectronic 2002.feb.20 Back To Mine 04 electronic trip hop or downtempo or acid jazz
                                      'tag_artist'  Faithless
                                     'tag_release'  None
                                       'tag_title'  Mushrooms
                                             'bpm'  118.221
                                    'search_title'  'mushrooms':1
                                   'search_artist'  'faithless':1
                                  'search_release'  
                                     'search_rest'  '00poprockelectronic':1 '20':4 '2002':2 '2002feb20':5 'acid':14 'back':6 'downtempo':13 'electronic':9 'feb':3 'hop':11 'jazz':15 'mine':8 'or':12 'to':7 'trip':10
                                    'search_combo'  '00poprockelectronic':3 '20':6 '2002':4 '2002feb20':7 'acid':16 'back':8 'downtempo':15 'electronic':11 'faithless':2B 'feb':5 'hop':13 'jazz':17 'mine':10 'mushrooms':1A 'or':14 'to':9 'trip':12
                                    'tag_tracknum'  4
                                      'num_images'  0
                                             'key'  8A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-1', 'Q-LOCALNESS-1', 'q-piano-1', 'q-mixbeat-2', 'q-play-3', 'Q-OLDST-3', 'Q-UNU-1', 'Q-JZFKS-1', 'q-busy-3', 'q-drums-4', 'q-syn-2', 'q-chart-4', 'q-other-1', 'Q-HAP-3', 'q-bass-4', 'q-grit-2']
                                      'lastfmtags'  ['dance', 'trip hop', 'electronica', 'electronic', 'house']
                                        'tag_date'  2002
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1636911242.923077  (2021-11-14 18:34:02)
                             'size'  4011347