======================== unified (from filesystem) ========================
                                         'bitrate'  '210.209'
                                        'duration'  '310'
                                          'artist'  'Izmar'
                                     'text_people'  ''
                                         'release'  ''
                                           'title'  'piano5'
                                           'quals'  ("['Q-HAP-3', 'Q-JZFKS-1', 'Q-LOCALNESS-1', 'Q-HHRNBTT-1', 'Q-OLDST-3', "
 "'Q-UNU-1', 'q-syn-3', 'Q-PLAY-2', 'q-bass-4', 'q-busy-2', 'q-grit-2', "
 "'Q-PIANO-2', 'q-chart-1', 'q-drums-3', 'q-other-3', 'q-vocals-1', "
 "'q-mixbeat-2']")
                                      'lastfmtags'  "['electronic', 'downtempo', 'drjazzmrfunkmusic', 'chillout', 'ambient']"
                                     'discogstags'  "['electronic']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '4'
                                      'tracktotal'  ''
                                            'date'  '2000'
                                        'comments'  ''
                                           'genre'  'electronic-generic or radio-beats'
                                             'bpm'  '122.068'
                                             'key'  '3A'
                                        'acoustid'  ''
rest: ''

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

'TBPM' (BPM (beats per minute))                     '122.068'
'TCON' (Content type, a.k.a. Genre)                 'electronic-generic or radio-beats'
'TDRC' (Recording time)                             '2000'
'TIT2' (Title/songname/content description)         'piano5'
'TKEY' (Initial key)                                '3A'
'TPE1' (Lead performer(s)/Soloist(s))               'Izmar'
'TRCK' (Track number/Position in set)               '4'
'TXXX:Q-HAP'                                        '3'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '1'
'TXXX:Q-LOCALNESS'                                  '1'
'TXXX:Q-OLDST'                                      '3'
'TXXX:Q-PIANO'                                      '2'
'TXXX:Q-PLAY'                                       '2'
'TXXX:Q-UNU'                                        '1'
'TXXX:discogstags'                                  'electronic'
'TXXX:lastfmtags'                                   ['electronic', 'downtempo', 'drjazzmrfunkmusic', 'chillout', 'ambient']
'TXXX:q-bass'                                       '4'
'TXXX:q-busy'                                       '2'
'TXXX:q-chart'                                      '1'
'TXXX:q-drums'                                      '3'
'TXXX:q-grit'                                       '2'
'TXXX:q-mixbeat'                                    '2'
'TXXX:q-other'                                      '3'
'TXXX:q-syn'                                        '3'
'TXXX:q-vocals'                                     '1'
'TXXX:replaygain_track_gain'                        '+2.76 dB'
'TXXX:replaygain_track_peak'                        '0.303851'

========================== row from database ==========================
                                              'id'  141720
                                            'path'  /data/Music/Bulk/00exnnpjpsprgttidm/monotonik/monotonik-archives-vol-2/mtk135-izmar-04-piano5.mp3
                                         'working'  None
                                         'bitrate'  210
                                    'duration_sec'  310
                                           'genre'  electronic-generic or radio-beats
                                        'filesize'  8171112
                                           'mtime'  1620543951
                                   'redo_metaread'  0
                                        'rest_str'   00exnnpjpsprgttidm monotonik monotonik archives vol 2 mtk135 izmar 04 electronic generic or radio beats
                                      'tag_artist'  Izmar
                                     'tag_release'  None
                                       'tag_title'  piano5
                                             'bpm'  122.068
                                    'search_title'  'piano5':1
                                   'search_artist'  'izmar':1
                                  'search_release'  
                                     'search_rest'  '2':4 'archives':2 'beats':11 'electronic':7 'generic':8 'izmar':6 'monotonik':1 'mtk135':5 'or':9 'radio':10 'vol':3
                                    'search_combo'  '2':6 'archives':4 'beats':13 'electronic':9 'generic':10 'izmar':2B,8 'monotonik':3 'mtk135':7 'or':11 'piano5':1A 'radio':12 'vol':5
                                    'tag_tracknum'  4
                                      'num_images'  0
                                             'key'  3A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-1', 'Q-LOCALNESS-1', 'q-mixbeat-2', 'Q-PIANO-2', 'Q-OLDST-3', 'Q-UNU-1', 'Q-JZFKS-1', 'q-busy-2', 'q-drums-3', 'q-syn-3', 'q-chart-1', 'q-other-3', 'Q-HAP-3', 'Q-PLAY-2', 'q-bass-4', 'q-grit-2']
                                      'lastfmtags'  ['electronic', 'downtempo', 'drjazzmrfunkmusic', 'chillout', 'ambient']
                                        'tag_date'  2000
                                     'discogstags'  ['electronic']

============================== file details ==============================
                                           'mtime'  1620543950.888419  (2021-05-09 09:05:50)
                             'size'  8171112