======================== unified (from filesystem) ========================
                                         'bitrate'  '200.462'
                                        'duration'  '186'
                                          'artist'  'Johnny Cash'
                                     'text_people'  'Johnny Cash'
                                         'release'  'Ring Of Fire (The Legend Of Johnny Cash)'
                                           'title'  'San Quentin (Live)'
                                           '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', "
 "'q-mixbeat-1']")
                                      'lastfmtags'  "['country', 'singer songwritergdchill', 'cover', 'singer songwriter']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '12'
                                      'tracktotal'  ''
                                            'date'  '2005'
                                        'comments'  ''
                                           'genre'  'loc-namerica-country'
                                             'bpm'  '84.315'
                                             'key'  '6B'
                                        'acoustid'  ''
rest: ''

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

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'TALB' (Album/Movie/Show title)                     'Ring Of Fire (The Legend Of Johnny Cash)'
'TBPM' (BPM (beats per minute))                     '84.315'
'TCOM' (Composer)                                   'Johnny Cash'
'TCON' (Content type, a.k.a. Genre)                 'loc-namerica-country'
'TDRC' (Recording time)                             '2005'
'TIT2' (Title/songname/content description)         'San Quentin (Live)'
'TKEY' (Initial key)                                '6B'
'TLAN' (Language(s))                                'eng'
'TPE1' (Lead performer(s)/Soloist(s))               'Johnny Cash'
'TPE2' (Band/orchestra/accompaniment)               'Johnny Cash'
'TPUB' (Publisher)                                  'Universal'
'TRCK' (Track number/Position in set)               '12'
'TSSE' (Software/Hardware and settings used for encoding)  'LAME v3.90.3 --alt-preset standard'
'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:Release type'                                 'Normal release'
'TXXX:Rip date'                                     '2006-01-08'
'TXXX:Source'                                       'CD'
'TXXX:lastfmtags'                                   ['country', 'singer songwritergdchill', 'cover', 'singer songwriter']
'TXXX:q-bass'                                       '3'
'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'                        '+0.21 dB'
'TXXX:replaygain_track_peak'                        '0.395617'

========================== row from database ==========================
                                              'id'  1494578
                                            'path'  /data/Music/Bulk/00localcharacter/Johnny Cash - Johnny_Cash-Ring_Of_Fire_(The_Legend_Of_Johnny_Cash)-2005/12-johnny_cash-san_quentin_(live).mp3
                                         'working'  None
                                         'bitrate'  200
                                    'duration_sec'  186
                                           'genre'  loc-namerica-country
                                        'filesize'  4685694
                                           'mtime'  1621629726
                                   'redo_metaread'  0
                                        'rest_str'   00localcharacter Johnny_Cash Ring_Of_Fire_(The_Legend_Of_Johnny_Cash) 2005 12 johnny_cash san_quentin_(live) loc namerica country
                                      'tag_artist'  Johnny Cash
                                     'tag_release'  Ring Of Fire (The Legend Of Johnny Cash)
                                       'tag_title'  San Quentin (Live)
                                             'bpm'  84.315
                                    'search_title'  'live':3,4 'quentin':2 'san':1
                                   'search_artist'  'cash':2 'johnny':1
                                  'search_release'  'cash':8,9 'fire':3 'johnny':7 'legend':6 'of':2 'ring':1 'the':4,5
                                     'search_rest'  '2005':19 'cash':2,10,18 'country':28 'fire':5,13 'johnny':1,9,17 'legend':7,15 'live':22,25 'loc':26 'namerica':27 'of':4,8,12,16 'quentin':21,24 'ring':3,11 'san':20,23 'the':6,14
                                    'search_combo'  '2005':34 'cash':6B,14C,15C,17,25,33 'country':43 'fire':9C,20,28 'johnny':5B,13C,16,24,32 'legend':12C,22,30 'live':3A,4A,37,40 'loc':41 'namerica':42 'of':8C,19,23,27,31 'quentin':2A,36,39 'ring':7C,18,26 'san':1A,35,38 'the':10C,11C,21,29
                                    'tag_tracknum'  12
                                      'num_images'  0
                                             'key'  6B
                                           '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-3', 'q-grit-2']
                                      'lastfmtags'  ['country', 'singer songwritergdchill', 'cover', 'singer songwriter']
                                        'tag_date'  2005
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1621629726.2634676  (2021-05-21 22:42:06)
                             'size'  4685694