======================== unified (from filesystem) ========================
                                         'bitrate'  '192.0'
                                        'duration'  '172'
                                          'artist'  'Eric Prydz'
                                     'text_people'  ''
                                         'release'  ''
                                           'title'  'Call On Me'
                                           'quals'  ("['Q-HAP-3', 'Q-LOCALNESS-1', 'Q-HHRNBTT-1', 'Q-JZFKS-1', 'Q-UNU-1', "
 "'Q-OLDST-3', 'q-syn-3', 'q-bass-3', 'q-busy-3', 'q-grit-2', 'q-play-2', "
 "'q-chart-3', 'q-drums-4', 'q-other-3', 'q-piano-1', 'q-vocals-2', "
 "'q-mixbeat-3']")
                                      'lastfmtags'  "['dance', 'house', 'techno', 'electronic', 'trance']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  ''
                                      'tracktotal'  ''
                                            'date'  ''
                                        'comments'  ''
                                           'genre'  'electronic-generic or radio-dance;electronic-th-trance'
                                             'bpm'  '126.252'
                                             'key'  '2A'
                                        'acoustid'  ''
rest: ''

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

'TBPM' (BPM (beats per minute))                     '126.252'
'TCON' (Content type, a.k.a. Genre)                 ['electronic-generic or radio-dance', 'electronic-th-trance']
'TIT2' (Title/songname/content description)         'Call On Me'
'TKEY' (Initial key)                                '2A'
'TPE1' (Lead performer(s)/Soloist(s))               'Eric Prydz'
'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', 'house', 'techno', 'electronic', 'trance']
'TXXX:q-bass'                                       '3'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '3'
'TXXX:q-drums'                                      '4'
'TXXX:q-grit'                                       '2'
'TXXX:q-mixbeat'                                    '3'
'TXXX:q-other'                                      '3'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '2'
'TXXX:q-syn'                                        '3'
'TXXX:q-vocals'                                     '2'
'TXXX:replaygain_track_gain'                        '-1.35 dB'
'TXXX:replaygain_track_peak'                        '0.475879'

========================== row from database ==========================
                                              'id'  1297448
                                            'path'  /data/Music/Bulk/00poprockelectronic/set/Eric Prydz - Call On Me.mp3
                                         'working'  None
                                         'bitrate'  192
                                    'duration_sec'  172
                                           'genre'  electronic-generic or radio-dance;electronic-th-trance
                                        'filesize'  4147072
                                           'mtime'  1621696883
                                   'redo_metaread'  0
                                        'rest_str'   00poprockelectronic set electronic generic or radio dance;electronic th trance
                                      'tag_artist'  Eric Prydz
                                     'tag_release'  None
                                       'tag_title'  Call On Me
                                             'bpm'  126.252
                                    'search_title'  'call':1 'me':3 'on':2
                                   'search_artist'  'eric':1 'prydz':2
                                  'search_release'  
                                     'search_rest'  '00poprockelectronic':1 'dance':7,9 'electronic':3,8,10 'generic':4 'or':5 'radio':6 'set':2 'th':11 'trance':12
                                    'search_combo'  '00poprockelectronic':6 'call':1A 'dance':12,14 'electronic':8,13,15 'eric':4B 'generic':9 'me':3A 'on':2A 'or':10 'prydz':5B 'radio':11 'set':7 'th':16 'trance':17
                                    'tag_tracknum'  None
                                      'num_images'  0
                                             'key'  2A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-2', '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-3', 'q-other-3', 'Q-HAP-3', 'q-bass-3', 'q-grit-2']
                                      'lastfmtags'  ['dance', 'house', 'techno', 'electronic', 'trance']
                                        'tag_date'  
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1621696883.383244  (2021-05-22 17:21:23)
                             'size'  4147072