======================== unified (from filesystem) ========================
                                         'bitrate'  '192.0'
                                        'duration'  '252'
                                          'artist'  'REM'
                                     'text_people'  ''
                                         'release'  'PromoOnly Mainstream Radio-Nov'
                                           'title'  'The Great Beyond'
                                           'quals'  ("['Q-JZFKS-1', 'Q-UNU-1', 'Q-HHRNBTT-1', 'Q-LOCALNESS-1', 'Q-OLDST-3', "
 "'q-syn-2', 'q-bass-4', 'q-busy-3', 'q-grit-2', 'q-play-3', 'q-chart-4', "
 "'q-drums-3', 'q-other-3', 'q-piano-1', 'q-vocals-3', 'q-mixbeat-2']")
                                      'lastfmtags'  "['rock', 'alternative rock', 'alternative', 'indie', '90s']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '15'
                                      'tracktotal'  ''
                                            'date'  '1999'
                                        'comments'  ''
                                           'genre'  'electronic-generic or radio'
                                             'bpm'  '109.408'
                                             'key'  '6A'
                                        'acoustid'  ''
rest: ''

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

'TALB' (Album/Movie/Show title)                     'PromoOnly Mainstream Radio-Nov'
'TBPM' (BPM (beats per minute))                     '109.408'
'TCON' (Content type, a.k.a. Genre)                 'electronic-generic or radio'
'TDRC' (Recording time)                             '1999'
'TIT2' (Title/songname/content description)         'The Great Beyond'
'TKEY' (Initial key)                                '6A'
'TPE1' (Lead performer(s)/Soloist(s))               'REM'
'TRCK' (Track number/Position in set)               '15'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '1'
'TXXX:Q-LOCALNESS'                                  '1'
'TXXX:Q-OLDST'                                      '3'
'TXXX:Q-UNU'                                        '1'
'TXXX:lastfmtags'                                   ['rock', 'alternative rock', 'alternative', 'indie', '90s']
'TXXX:q-bass'                                       '4'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '4'
'TXXX:q-drums'                                      '3'
'TXXX:q-grit'                                       '2'
'TXXX:q-mixbeat'                                    '2'
'TXXX:q-other'                                      '3'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '3'
'TXXX:q-syn'                                        '2'
'TXXX:q-vocals'                                     '3'
'TXXX:replaygain_track_gain'                        '+0.37 dB'
'TXXX:replaygain_track_peak'                        '0.490855'

========================== row from database ==========================
                                              'id'  1339273
                                            'path'  /data/Music/Bulk/00poprockelectronic/R.E.M/REM - the great beyond.mp3
                                         'working'  None
                                         'bitrate'  192
                                    'duration_sec'  252
                                           'genre'  electronic-generic or radio
                                        'filesize'  6072320
                                           'mtime'  1630248924
                                   'redo_metaread'  0
                                        'rest_str'   00poprockelectronic R.E.M the great beyond electronic generic or radio
                                      'tag_artist'  REM
                                     'tag_release'  PromoOnly Mainstream Radio-Nov
                                       'tag_title'  The Great Beyond
                                             'bpm'  109.408
                                    'search_title'  'beyond':3 'great':2 'the':1
                                   'search_artist'  'rem':1
                                  'search_release'  'mainstream':2 'nov':4 'only':7 'promo':6 'promoonly':1 'radio':3 'radionov':5
                                     'search_rest'  '00poprockelectronic':1 'beyond':8 'e':3 'electronic':9 'generic':10 'great':7 'm':4 'or':11 'r':2 'radio':12 'rem':5 'the':6
                                    'search_combo'  '00poprockelectronic':12 'beyond':3A,19 'e':14 'electronic':20 'generic':21 'great':2A,18 'm':15 'mainstream':6C 'nov':8C 'only':11C 'or':22 'promo':10C 'promoonly':5C 'r':13 'radio':7C,23 'radionov':9C 'rem':4B,16 'the':1A,17
                                    'tag_tracknum'  15
                                      'num_images'  0
                                             'key'  6A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-3', '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-3', 'q-syn-2', 'q-chart-4', 'q-other-3', 'q-bass-4', 'q-grit-2']
                                      'lastfmtags'  ['rock', 'alternative rock', 'alternative', 'indie', '90s']
                                        'tag_date'  1999
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1630248924.0658014  (2021-08-29 16:55:24)
                             'size'  6072320