======================== unified (from filesystem) ========================
                                         'bitrate'  '221.819'
                                        'duration'  '152'
                                          'artist'  'Tom Waits'
                                     'text_people'  ''
                                         'release'  'Rain Dogs'
                                           'title'  'Diamonds and Gold'
                                           'quals'  ("['Q-JZFKS-2', 'Q-HAP-2', 'Q-LOCALNESS-2', 'Q-UNU-2', 'Q-OLDST-3', "
 "'Q-HHRNBTT-1', 'q-syn-2', 'q-bass-3', 'q-busy-3', 'q-grit-2', 'q-play-3', "
 "'q-chart-2', 'q-drums-4', 'q-other-2', 'q-piano-1', 'q-vocals-3', "
 "'q-mixbeat-1']")
                                      'lastfmtags'  "['blues', 'rock', 'alternative', 'experimental', 'singer songwriter']"
                                     'discogstags'  "['rock', 'blues', 'blues rock']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '7'
                                      'tracktotal'  ''
                                            'date'  '1985'
                                        'comments'  ''
                                           'genre'  'ifs-songwriter-eos'
                                             'bpm'  '120.542'
                                             'key'  '6A'
                                        'acoustid'  ''
rest: ''

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

'TALB' (Album/Movie/Show title)                     'Rain Dogs'
'TBPM' (BPM (beats per minute))                     '120.542'
'TCON' (Content type, a.k.a. Genre)                 'ifs-songwriter-eos'
'TDRC' (Recording time)                             '1985'
'TIT2' (Title/songname/content description)         'Diamonds and Gold'
'TKEY' (Initial key)                                '6A'
'TPE1' (Lead performer(s)/Soloist(s))               'Tom Waits'
'TRCK' (Track number/Position in set)               '7'
'TXXX:Q-HAP'                                        '2'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '2'
'TXXX:Q-LOCALNESS'                                  '2'
'TXXX:Q-OLDST'                                      '3'
'TXXX:Q-UNU'                                        '2'
'TXXX:discogstags'                                  ['rock', 'blues', 'blues rock']
'TXXX:lastfmtags'                                   ['blues', 'rock', 'alternative', 'experimental', 'singer songwriter']
'TXXX:q-bass'                                       '3'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '2'
'TXXX:q-drums'                                      '4'
'TXXX:q-grit'                                       '2'
'TXXX:q-mixbeat'                                    '1'
'TXXX:q-other'                                      '2'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '3'
'TXXX:q-syn'                                        '2'
'TXXX:q-vocals'                                     '3'
'TXXX:replaygain_track_gain'                        '-0.61 dB'
'TXXX:replaygain_track_peak'                        '1.027117'

========================== row from database ==========================
                                              'id'  1371563
                                            'path'  /data/Music/Bulk/00singer-songwriter-eos/00songwriter-eos/Tom Waits/1985 - Rain Dogs/MBZ;#Tom Waits;#Rain Dogs;#07;#Diamonds and Gold.mp3
                                         'working'  None
                                         'bitrate'  221
                                    'duration_sec'  152
                                           'genre'  ifs-songwriter-eos
                                        'filesize'  4234776
                                           'mtime'  1639508245
                                   'redo_metaread'  0
                                        'rest_str'   00singer songwriter eos 00songwriter eos 1985 MBZ;#Tom Waits;#Rain Dogs;#07;#Diamonds ifs songwriter eos
                                      'tag_artist'  Tom Waits
                                     'tag_release'  Rain Dogs
                                       'tag_title'  Diamonds and Gold
                                             'bpm'  120.542
                                    'search_title'  'and':2 'diamonds':1 'gold':3
                                   'search_artist'  'tom':1 'waits':2
                                  'search_release'  'dogs':2 'rain':1
                                     'search_rest'  '00singer':1 '00songwriter':4 '07':15,18 '1985':5 'diamonds':16,19 'dogs':14,17 'eos':3 'ifs':20 'mbz':6,8 'rain':11,13 'songwriter':2 'tom':7,9 'waits':10,12
                                    'search_combo'  '00singer':8 '00songwriter':11 '07':22,25 '1985':12 'and':2A 'diamonds':1A,23,26 'dogs':7C,21,24 'eos':10 'gold':3A 'ifs':27 'mbz':13,15 'rain':6C,18,20 'songwriter':9 'tom':4B,14,16 'waits':5B,17,19
                                    'tag_tracknum'  7
                                      'num_images'  0
                                             'key'  6A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-3', 'Q-LOCALNESS-2', 'q-piano-1', 'q-mixbeat-1', 'q-play-3', 'Q-OLDST-3', 'Q-UNU-2', 'Q-JZFKS-2', 'q-busy-3', 'q-drums-4', 'q-syn-2', 'q-chart-2', 'q-other-2', 'Q-HAP-2', 'q-bass-3', 'q-grit-2']
                                      'lastfmtags'  ['blues', 'rock', 'alternative', 'experimental', 'singer songwriter']
                                        'tag_date'  1985
                                     'discogstags'  ['rock', 'blues', 'blues rock']

============================== file details ==============================
                                           'mtime'  1639508245.317061  (2021-12-14 19:57:25)
                             'size'  4234776