======================== unified (from filesystem) ========================
                                         'bitrate'  '192.0'
                                        'duration'  '159'
                                          'artist'  'Johnny Cash'
                                     'text_people'  ''
                                         'release'  'The Very Best Of'
                                           'title'  "When It's Springtime In Alaska"
                                           'quals'  ("['Q-HAP-3', 'Q-JZFKS-1', 'Q-UNU-1', 'Q-OLDST-3', 'Q-HHRNBTT-1', "
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 "'q-chart-4', 'q-drums-1', 'q-other-3', 'q-piano-1', 'q-vocals-4', "
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                                      'lastfmtags'  "['country', 'singer songwritergdchill', 'cover', 'singer songwriter']"
                                     'discogstags'  "['rock', 'blues', 'folk, world, & country']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '13'
                                      'tracktotal'  ''
                                            'date'  '2001'
                                        'comments'  ''
                                           'genre'  'loc-namerica-country'
                                             'bpm'  '91.1'
                                             'key'  '12B'
                                        'acoustid'  ''
rest: ''

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

'TALB' (Album/Movie/Show title)                     'The Very Best Of'
'TBPM' (BPM (beats per minute))                     '91.1'
'TCON' (Content type, a.k.a. Genre)                 'loc-namerica-country'
'TDRC' (Recording time)                             '2001'
'TIT2' (Title/songname/content description)         "When It's Springtime In Alaska"
'TKEY' (Initial key)                                '12B'
'TPE1' (Lead performer(s)/Soloist(s))               'Johnny Cash'
'TRCK' (Track number/Position in set)               '13'
'TXXX:Q-HAP'                                        '3'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '1'
'TXXX:Q-LOCALNESS'                                  '3'
'TXXX:Q-OLDST'                                      '3'
'TXXX:Q-UNU'                                        '1'
'TXXX:discogstags'                                  ['rock', 'blues', 'folk, world, & country']
'TXXX:lastfmtags'                                   ['country', 'singer songwritergdchill', 'cover', 'singer songwriter']
'TXXX:q-bass'                                       '1'
'TXXX:q-busy'                                       '2'
'TXXX:q-chart'                                      '4'
'TXXX:q-drums'                                      '1'
'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'                                     '4'
'TXXX:replaygain_track_gain'                        '+1.84 dB'
'TXXX:replaygain_track_peak'                        '0.468231'

========================== row from database ==========================
                                              'id'  1508655
                                            'path'  /data/Music/Bulk/00singer-songwriter-eos/Johnny Cash_/Man In Black (The Very Best Of)/Cd 1/13 - When It_s Springtime In Alaska.mp3
                                         'working'  None
                                         'bitrate'  192
                                    'duration_sec'  159
                                           'genre'  loc-namerica-country
                                        'filesize'  3831897
                                           'mtime'  1621630286
                                   'redo_metaread'  0
                                        'rest_str'   00singer songwriter eos Cash_ Man Black (The Of) Cd 1 13 It_s loc namerica country
                                      'tag_artist'  Johnny Cash
                                     'tag_release'  The Very Best Of
                                       'tag_title'  When It's Springtime In Alaska
                                             'bpm'  91.1
                                    'search_title'  'alaska':7 'in':6 'it':2 'its':4 's':3 'springtime':5 'when':1
                                   'search_artist'  'cash':2 'johnny':1
                                  'search_release'  'best':3 'of':4 'the':1 'very':2
                                     'search_rest'  '00singer':1 '1':12 'black':6 'cash':4 'cd':11 'country':17 'eos':3 'it':13 'loc':15 'man':5 'namerica':16 'of':9,10 's':14 'songwriter':2 'the':7,8
                                    'search_combo'  '00singer':14 '1':25 'alaska':7A 'best':12C 'black':19 'cash':9B,17 'cd':24 'country':30 'eos':16 'in':6A 'it':2A,26 'its':4A 'johnny':8B 'loc':28 'man':18 'namerica':29 'of':13C,22,23 's':3A,27 'songwriter':15 'springtime':5A 'the':10C,20,21 'very':11C 'when':1A
                                    'tag_tracknum'  13
                                      'num_images'  0
                                             'key'  12B
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-4', 'Q-LOCALNESS-3', 'q-piano-1', 'q-mixbeat-1', 'q-play-3', 'Q-OLDST-3', 'Q-UNU-1', 'Q-JZFKS-1', 'q-busy-2', 'q-drums-1', 'q-syn-1', 'q-chart-4', 'q-other-3', 'Q-HAP-3', 'q-bass-1', 'q-grit-2']
                                      'lastfmtags'  ['country', 'singer songwritergdchill', 'cover', 'singer songwriter']
                                        'tag_date'  2001
                                     'discogstags'  ['rock', 'blues', 'folk, world, & country']

============================== file details ==============================
                                           'mtime'  1621630286.4161007  (2021-05-21 22:51:26)
                             'size'  3831897