======================== unified (from filesystem) ========================
                                         'bitrate'  '192.0'
                                        'duration'  '222'
                                          'artist'  'Amy Winehouse'
                                     'text_people'  ''
                                         'release'  'Back to Black'
                                           'title'  'Wake Up Alone'
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                                      'lastfmtags'  "['jazz', 'female vocalists', 'soul', 'british', 'singer songwriter']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '8'
                                      'tracktotal'  '11'
                                            'date'  '2006'
                                        'comments'  ''
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======================== rawer (from filesystem) ========================

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'TBPM' (BPM (beats per minute))                     '141.2'
'TCON' (Content type, a.k.a. Genre)                 'ifs-songwriter-jazz'
'TDOR' (Original release time)                      '2006'
'TDRC' (Recording time)                             '2006-10-30'
'TIT2' (Title/songname/content description)         'Wake Up Alone'
'TKEY' (Initial key)                                '9A'
'TMED' (Media type)                                 'Enhanced CD'
'TPE1' (Lead performer(s)/Soloist(s))               'Amy Winehouse'
'TPE2' (Band/orchestra/accompaniment)               'Amy Winehouse'
'TPOS' (Part of a set)                              '1/1'
'TPUB' (Publisher)                                  'Universal Records'
'TRCK' (Track number/Position in set)               '8/11'
'TSO2'                                              'Winehouse, Amy'
'TSOP' (Performer sort order)                       'Winehouse, Amy'
'TSRC' (ISRC (international standard recording code))  'GBUM70603491'
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'TXXX:CATALOGNUMBER'                                '171 304 1'
'TXXX:MusicBrainz Album Artist Id'                  'dfe9a7c4-8cf2-47f4-9dcb-d233c2b86ec3'
'TXXX:MusicBrainz Album Id'                         'bef386f1-3b81-461a-85c6-f97a2e61ac9e'
'TXXX:MusicBrainz Album Release Country'            'GB'
'TXXX:MusicBrainz Album Status'                     'official'
'TXXX:MusicBrainz Album Type'                       'album'
'TXXX:MusicBrainz Artist Id'                        'dfe9a7c4-8cf2-47f4-9dcb-d233c2b86ec3'
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'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '2'
'TXXX:Q-LOCALNESS'                                  '1'
'TXXX:Q-OLDST'                                      '3'
'TXXX:Q-UNU'                                        '1'
'TXXX:SCRIPT'                                       'Latn'
'TXXX:lastfmtags'                                   ['jazz', 'female vocalists', 'soul', 'british', 'singer songwriter']
'TXXX:q-bass'                                       '4'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '4'
'TXXX:q-drums'                                      '2'
'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'                                     '4'
'TXXX:replaygain_track_gain'                        '-1.15 dB'
'TXXX:replaygain_track_peak'                        '0.407745'
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========================== row from database ==========================
                                              'id'  1249322
                                            'path'  /data/Music/Bulk/00singer-songwriter-eos/Amy Winehouse/Back To Black/08  Amy Winehouse - Wake Up Alone.mp3
                                         'working'  None
                                         'bitrate'  192
                                    'duration_sec'  222
                                           'genre'  ifs-songwriter-jazz
                                        'filesize'  5333164
                                           'mtime'  1642256047
                                   'redo_metaread'  0
                                        'rest_str'   00singer songwriter eos To 08 ifs songwriter jazz
                                      'tag_artist'  Amy Winehouse
                                     'tag_release'  Back to Black
                                       'tag_title'  Wake Up Alone
                                             'bpm'  141.2
                                    'search_title'  'alone':3 'up':2 'wake':1
                                   'search_artist'  'amy':1 'winehouse':2
                                  'search_release'  'back':1 'black':3 'to':2
                                     'search_rest'  '00singer':1 'eos':3 'ifs':5 'jazz':6 'songwriter':2 'to':4
                                    'search_combo'  '00singer':9 'alone':3A 'amy':4B 'back':6C 'black':8C 'eos':11 'ifs':13 'jazz':14 'songwriter':10 'to':7C,12 'up':2A 'wake':1A 'winehouse':5B
                                    'tag_tracknum'  8
                                      'num_images'  0
                                             'key'  9A
                                           'quals'  ['Q-HAP-2', 'Q-LOCALNESS-1', 'Q-UNU-1', 'Q-OLDST-3', 'Q-HHRNBTT-1', 'Q-JZFKS-2', 'q-syn-2', 'q-bass-4', 'q-busy-3', 'q-grit-2', 'q-play-3', 'q-chart-4', 'q-drums-2', 'q-other-2', 'q-piano-1', 'q-vocals-4', 'q-mixbeat-1']
                                      'lastfmtags'  ['jazz', 'female vocalists', 'soul', 'british', 'singer songwriter']
                                        'tag_date'  2006
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1642256047.0073173  (2022-01-15 15:14:07)
                             'size'  5333164