======================== unified (from filesystem) ========================
                                         'bitrate'  '159.981'
                                        'duration'  '221'
                                          'artist'  'Atb'
                                     'text_people'  ''
                                         'release'  "Movin' Melodies"
                                           'title'  "Don't Stop"
                                           'quals'  ("['Q-HAP-3', 'Q-HHRNBTT-1', 'Q-LOCALNESS-1', 'Q-JZFKS-1', 'Q-UNU-1', "
 "'Q-OLDST-3', 'q-syn-3', 'q-bass-4', 'q-busy-3', 'q-grit-2', 'q-play-2', "
 "'q-chart-3', 'q-drums-4', 'q-other-3', 'q-piano-1', 'q-vocals-1', "
 "'q-mixbeat-3']")
                                      'lastfmtags'  "['dance', 'trance', 'techno', 'electronic', 'vocal trance']"
                                     'discogstags'  "['trance', 'electronic', 'progressive trance']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '8'
                                      'tracktotal'  ''
                                            'date'  '1999'
                                        'comments'  ''
                                           'genre'  'electronic-generic or radio-dance'
                                             'bpm'  '134.288'
                                             'key'  '6B'
                                        'acoustid'  ''
rest: ''

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

'TALB' (Album/Movie/Show title)                     "Movin' Melodies"
'TBPM' (BPM (beats per minute))                     '134.288'
'TCON' (Content type, a.k.a. Genre)                 'electronic-generic or radio-dance'
'TDOR' (Original release time)                      '1999'
'TDRC' (Recording time)                             '1999'
'TIT2' (Title/songname/content description)         "Don't Stop"
'TKEY' (Initial key)                                '6B'
'TPE1' (Lead performer(s)/Soloist(s))               'Atb'
'TRCK' (Track number/Position in set)               '8'
'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:discogstags'                                  ['trance', 'electronic', 'progressive trance']
'TXXX:lastfmtags'                                   ['dance', 'trance', 'techno', 'electronic', 'vocal trance']
'TXXX:q-bass'                                       '4'
'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'                                     '1'
'TXXX:replaygain_track_gain'                        '+1.87 dB'
'TXXX:replaygain_track_peak'                        '0.344888'

========================== row from database ==========================
                                              'id'  1506481
                                            'path'  /data/Music/Bulk/00poprockelectronic/Unsorted/[loose files]/08. Don_t Stop.mp3
                                         'working'  None
                                         'bitrate'  159
                                    'duration_sec'  221
                                           'genre'  electronic-generic or radio-dance
                                        'filesize'  4425416
                                           'mtime'  1621696726
                                   'redo_metaread'  0
                                        'rest_str'   00poprockelectronic Unsorted [loose files] 08. Don_t electronic generic or radio dance
                                      'tag_artist'  Atb
                                     'tag_release'  Movin' Melodies
                                       'tag_title'  Don't Stop
                                             'bpm'  134.288
                                    'search_title'  'don':1 'dont':3 'stop':4 't':2
                                   'search_artist'  'atb':1
                                  'search_release'  'melodies':3 'movin':1,2
                                     'search_rest'  '00poprockelectronic':1 '08':7,8 'dance':15 'don':9 'electronic':11 'files':5,6 'generic':12 'loose':3,4 'or':13 'radio':14 't':10 'unsorted':2
                                    'search_combo'  '00poprockelectronic':9 '08':15,16 'atb':5B 'dance':23 'don':1A,17 'dont':3A 'electronic':19 'files':13,14 'generic':20 'loose':11,12 'melodies':8C 'movin':6C,7C 'or':21 'radio':22 'stop':4A 't':2A,18 'unsorted':10
                                    'tag_tracknum'  8
                                      'num_images'  0
                                             'key'  6B
                                           '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-3', 'q-other-3', 'Q-HAP-3', 'q-bass-4', 'q-grit-2']
                                      'lastfmtags'  ['dance', 'trance', 'techno', 'electronic', 'vocal trance']
                                        'tag_date'  1999
                                     'discogstags'  ['trance', 'electronic', 'progressive trance']

============================== file details ==============================
                                           'mtime'  1621696725.9043946  (2021-05-22 17:18:45)
                             'size'  4425416