======================== unified (from filesystem) ========================
                                         'bitrate'  '171.489'
                                        'duration'  '211'
                                          'artist'  'Stevie Ray Vaughan'
                                     'text_people'  ''
                                         'release'  'Texas Flood'
                                           'title'  'Mary Had A Little Lamb (Live)'
                                           'quals'  ("['Q-HAP-2', 'Q-JZFKS-3', 'Q-LOCALNESS-1', 'Q-UNU-1', 'Q-HHRNBTT-1', "
 "'Q-OLDST-1', 'q-syn-1', 'q-bass-4', 'q-busy-2', 'q-grit-2', 'q-play-3', "
 "'q-chart-3', 'q-drums-4', 'q-other-3', 'q-piano-1', 'q-vocals-2', "
 "'q-mixbeat-1']")
                                      'lastfmtags'  "['blues rock', 'guitar', 'blues', 'rock', 'classic rock']"
                                     'discogstags'  "['blues rock', 'rock']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '14'
                                      'tracktotal'  '15'
                                            'date'  '1983'
                                        'comments'  ''
                                           'genre'  'prerock-jb-blues-rock;mi-guitar-electric'
                                             'bpm'  '123.708'
                                             'key'  '2A'
                                        'acoustid'  ''
rest: ''

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

'COMM:CDDB Disc ID:XXX'                             'D90DDB0F'
'COMM:ID3v1 Comment:XXX'                            'D90DDB0F'
'TALB' (Album/Movie/Show title)                     'Texas Flood'
'TBPM' (BPM (beats per minute))                     '123.708'
'TCON' (Content type, a.k.a. Genre)                 ['prerock-jb-blues-rock', 'mi-guitar-electric']
'TDRC' (Recording time)                             '1983'
'TIT2' (Title/songname/content description)         'Mary Had A Little Lamb (Live)'
'TKEY' (Initial key)                                '2A'
'TPE1' (Lead performer(s)/Soloist(s))               'Stevie Ray Vaughan'
'TRCK' (Track number/Position in set)               '14/15'
'TSSE' (Software/Hardware and settings used for encoding)  'Audiograbber 1.80, LAME dll 3.89, VBR 3, Stereo, High quality'
'TXXX:Q-HAP'                                        '2'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '3'
'TXXX:Q-LOCALNESS'                                  '1'
'TXXX:Q-OLDST'                                      '1'
'TXXX:Q-UNU'                                        '1'
'TXXX:discogstags'                                  ['blues rock', 'rock']
'TXXX:lastfmtags'                                   ['blues rock', 'guitar', 'blues', 'rock', 'classic rock']
'TXXX:q-bass'                                       '4'
'TXXX:q-busy'                                       '2'
'TXXX:q-chart'                                      '3'
'TXXX:q-drums'                                      '4'
'TXXX:q-grit'                                       '2'
'TXXX:q-mixbeat'                                    '1'
'TXXX:q-other'                                      '3'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '3'
'TXXX:q-syn'                                        '1'
'TXXX:q-vocals'                                     '2'
'TXXX:replaygain_track_gain'                        '+0.28 dB'
'TXXX:replaygain_track_peak'                        '0.640151'

========================== row from database ==========================
                                              'id'  778374
                                            'path'  /data/Music/Bulk/00blues-jazz-exotica-oldies-country/Vaughan, Stevie Ray/Texas Flood/Stevie Ray Vaughan - Mary Had A Little Lamb (Live) - 14.mp3
                                         'working'  None
                                         'bitrate'  171
                                    'duration_sec'  211
                                           'genre'  prerock-jb-blues-rock;mi-guitar-electric
                                        'filesize'  4540288
                                           'mtime'  1674646720
                                   'redo_metaread'  0
                                        'rest_str'   00blues jazz exotica oldies country Vaughan, 14 prerock jb blues rock;mi guitar electric
                                      'tag_artist'  Stevie Ray Vaughan
                                     'tag_release'  Texas Flood
                                       'tag_title'  Mary Had A Little Lamb (Live)
                                             'bpm'  123.708
                                    'search_title'  'a':3 'had':2 'lamb':5 'little':4 'live':6,7 'mary':1
                                   'search_artist'  'ray':2 'stevie':1 'vaughan':3
                                  'search_release'  'flood':2 'texas':1
                                     'search_rest'  'blues':9 'country':4 'electric':15 'exotica':2 'guitar':14 'jazz':1 'jb':8 'mi':11,13 'oldies':3 'prerock':7 'rock':10,12 'vaughan':5,6
                                    'search_combo'  'a':3A 'blues':21 'country':16 'electric':27 'exotica':14 'flood':12C 'guitar':26 'had':2A 'jazz':13 'jb':20 'lamb':5A 'little':4A 'live':6A,7A 'mary':1A 'mi':23,25 'oldies':15 'prerock':19 'ray':9B 'rock':22,24 'stevie':8B 'texas':11C 'vaughan':10B,17,18
                                    'tag_tracknum'  14
                                      'num_images'  0
                                             'key'  2A
                                           'quals'  ['Q-HAP-2', 'Q-JZFKS-3', 'Q-LOCALNESS-1', 'Q-UNU-1', 'Q-HHRNBTT-1', 'Q-OLDST-1', 'q-syn-1', 'q-bass-4', 'q-busy-2', 'q-grit-2', 'q-play-3', 'q-chart-3', 'q-drums-4', 'q-other-3', 'q-piano-1', 'q-vocals-2', 'q-mixbeat-1']
                                      'lastfmtags'  ['blues rock', 'guitar', 'blues', 'rock', 'classic rock']
                                        'tag_date'  1983
                                     'discogstags'  ['blues rock', 'rock']

============================== file details ==============================
                                           'mtime'  1674646720.2501216  (2023-01-25 12:38:40)
                             'size'  4540288