======================== unified (from filesystem) ========================
                                         'bitrate'  '320.0'
                                        'duration'  '224'
                                          'artist'  'Eric Prydz'
                                     'text_people'  ''
                                         'release'  'Funky House Classics [Disc 01]'
                                           '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'  '18'
                                      'tracktotal'  '20'
                                            'date'  ''
                                        'comments'  ''
                                           'genre'  'electronic-generic or radio-dance;electronic-th-trance'
                                             'bpm'  '128.332'
                                             'key'  '1B'
                                        'acoustid'  ''
rest: ''

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

'APIC:'                                             type PictureType.COVER_FRONT (Cover (front)) b''
                                     
'TALB' (Album/Movie/Show title)                     'Funky House Classics [Disc 01]'
'TBPM' (BPM (beats per minute))                     '128.332'
'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)                                '1B'
'TPE1' (Lead performer(s)/Soloist(s))               'Eric Prydz'
'TPE2' (Band/orchestra/accompaniment)               'Eric Prydz'
'TPOS' (Part of a set)                              '1/3'
'TRCK' (Track number/Position in set)               '18/20'
'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:date'                                         '2010'
'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'                        '-1.22 dB'
'TXXX:replaygain_track_peak'                        '0.434798'

========================== row from database ==========================
                                              'id'  1286399
                                            'path'  /data/Music/Bulk/00poprockelectronic/set/1-18 Eric Prydz - CALL ON ME.mp3
                                         'working'  None
                                         'bitrate'  320
                                    'duration_sec'  224
                                           'genre'  electronic-generic or radio-dance;electronic-th-trance
                                        'filesize'  9070592
                                           'mtime'  1621696883
                                   'redo_metaread'  0
                                        'rest_str'   00poprockelectronic set 18 CALL ON ME electronic generic or radio dance;electronic th trance
                                      'tag_artist'  Eric Prydz
                                     'tag_release'  Funky House Classics [Disc 01]
                                       'tag_title'  Call On Me
                                             'bpm'  128.332
                                    'search_title'  'call':1 'me':3 'on':2
                                   'search_artist'  'eric':1 'prydz':2
                                  'search_release'  '01':6,7 'classics':3 'disc':4,5 'funky':1 'house':2
                                     'search_rest'  '00poprockelectronic':1 '18':3 'call':4 'dance':11,13 'electronic':7,12,14 'generic':8 'me':6 'on':5 'or':9 'radio':10 'set':2 'th':15 'trance':16
                                    'search_combo'  '00poprockelectronic':13 '01':11C,12C '18':15 'call':1A,16 'classics':8C 'dance':23,25 'disc':9C,10C 'electronic':19,24,26 'eric':4B 'funky':6C 'generic':20 'house':7C 'me':3A,18 'on':2A,17 'or':21 'prydz':5B 'radio':22 'set':14 'th':27 'trance':28
                                    'tag_tracknum'  18
                                      'num_images'  1
                                             'key'  1B
                                           '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'  1621696883.0176315  (2021-05-22 17:21:23)
                             'size'  9070592