======================== unified (from filesystem) ========================
                                         'bitrate'  '174.333'
                                        'duration'  '476'
                                          'artist'  'Janis Joplin'
                                     'text_people'  ''
                                         'release'  'Greatest Hits'
                                           'title'  'Ball and Chain'
                                           'quals'  ("['Q-HAP-3', 'Q-JZFKS-1', 'Q-UNU-1', 'Q-LOCALNESS-1', 'Q-HHRNBTT-1', "
 "'Q-OLDST-2', 'q-syn-2', 'q-bass-3', 'q-busy-3', 'q-grit-3', 'q-play-3', "
 "'q-chart-3', 'q-drums-2', 'q-other-3', 'q-piano-1', 'q-vocals-3', "
 "'q-mixbeat-2']")
                                      'lastfmtags'  "['blues', 'rock', 'female vocalists', '60s', 'classic rock']"
                                     'discogstags'  "['rock']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '10'
                                      'tracktotal'  '12'
                                            'date'  '1989'
                                        'comments'  ''
                                           'genre'  'rock-early-blues;rock-cppex-progressive;set-pl-progspace'
                                             'bpm'  '143.0'
                                             'key'  '6A'
                                        'acoustid'  ''
rest: ''

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

'COMM:CDDB Disc ID:XXX'                             'A50B080C'
'TALB' (Album/Movie/Show title)                     'Greatest Hits'
'TBPM' (BPM (beats per minute))                     '143.0'
'TCON' (Content type, a.k.a. Genre)                 ['rock-early-blues', 'rock-cppex-progressive', 'set-pl-progspace']
'TDRC' (Recording time)                             '1989'
'TIT2' (Title/songname/content description)         'Ball and Chain'
'TKEY' (Initial key)                                '6A'
'TPE1' (Lead performer(s)/Soloist(s))               'Janis Joplin'
'TRCK' (Track number/Position in set)               '10/12'
'TSSE' (Software/Hardware and settings used for encoding)  'Audiograbber 1.80, LAME dll 3.92, VBR 3, Stereo, High quality'
'TXXX:Q-HAP'                                        '3'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '1'
'TXXX:Q-LOCALNESS'                                  '1'
'TXXX:Q-OLDST'                                      '2'
'TXXX:Q-UNU'                                        '1'
'TXXX:discogstags'                                  'rock'
'TXXX:lastfmtags'                                   ['blues', 'rock', 'female vocalists', '60s', 'classic rock']
'TXXX:q-bass'                                       '3'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '3'
'TXXX:q-drums'                                      '2'
'TXXX:q-grit'                                       '3'
'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'                        '+0.68 dB'
'TXXX:replaygain_track_peak'                        '0.527374'

========================== row from database ==========================
                                              'id'  1274547
                                            'path'  /data/Music/Bulk/00singer-songwriter-eos/Janis Joplin/Greatest Hits/Janis Joplin - 10 Ball and Chain - 10.mp3
                                         'working'  None
                                         'bitrate'  174
                                    'duration_sec'  476
                                           'genre'  rock-early-blues;rock-cppex-progressive;set-pl-progspace
                                        'filesize'  10391857
                                           'mtime'  1620737832
                                   'redo_metaread'  0
                                        'rest_str'   00singer songwriter eos 10 10 rock early blues;rock cppex progressive;set progspace
                                      'tag_artist'  Janis Joplin
                                     'tag_release'  Greatest Hits
                                       'tag_title'  Ball and Chain
                                             'bpm'  143.0
                                    'search_title'  'and':2 'ball':1 'chain':3
                                   'search_artist'  'janis':1 'joplin':2
                                  'search_release'  'greatest':1 'hits':2
                                     'search_rest'  '00singer':1 'blues':6,8 'cppex':10 'early':5 'eos':3 'progressive':11,13 'progspace':15 'rock':4,7,9 'set':12,14 'songwriter':2
                                    'search_combo'  '00singer':8 'and':2A 'ball':1A 'blues':13,15 'chain':3A 'cppex':17 'early':12 'eos':10 'greatest':6C 'hits':7C 'janis':4B 'joplin':5B 'progressive':18,20 'progspace':22 'rock':11,14,16 'set':19,21 'songwriter':9
                                    'tag_tracknum'  10
                                      '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-2', 'Q-UNU-1', 'Q-JZFKS-1', 'q-busy-3', 'q-drums-2', 'q-syn-2', 'q-chart-3', 'q-other-3', 'Q-HAP-3', 'q-bass-3', 'q-grit-3']
                                      'lastfmtags'  ['blues', 'rock', 'female vocalists', '60s', 'classic rock']
                                        'tag_date'  1989
                                     'discogstags'  ['rock']

============================== file details ==============================
                                           'mtime'  1620737832.395641  (2021-05-11 14:57:12)
                             'size'  10391857