======================== unified (from filesystem) ========================
                                         'bitrate'  '320.0'
                                        'duration'  '209'
                                          'artist'  'Shelby Lynne'
                                     'text_people'  'Bill Bottrell/Shelby Lynne'
                                         'release'  'I Am Shelby Lynne'
                                           'title'  "Lookin' Up"
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                                      'lastfmtags'  "['lush', 'country', 'alt country', 'female vocalists', 'singer songwriter']"
                                     'discogstags'  "['blues rock', 'country rock', 'rock']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '7'
                                      'tracktotal'  '16'
                                            'date'  '1999'
                                        'comments'  ''
                                           'genre'  'ifs-songwriter-country'
                                             'bpm'  '137.0'
                                             'key'  '1B'
                                        'acoustid'  ''
rest: ''

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

'APIC:'                                             type PictureType.COVER_FRONT (Cover (front)) b''
                                     
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'COMM:iTunes_CDDB_1:eng'                            'E80E7910+278026+16+150+13363+27811+42680+60343+76791+96282+112000+131024+148348+165059+184385+202048+216270+235175+266597'
'COMM:iTunes_CDDB_TrackNumber:eng'                  '7'
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'TALB' (Album/Movie/Show title)                     'I Am Shelby Lynne'
'TBPM' (BPM (beats per minute))                     '137.0'
'TCOM' (Composer)                                   'Bill Bottrell/Shelby Lynne'
'TCON' (Content type, a.k.a. Genre)                 'ifs-songwriter-country'
'TDRC' (Recording time)                             '1999'
'TENC' (Encoded by)                                 'iTunes 11.4.0.18'
'TIT2' (Title/songname/content description)         "Lookin' Up"
'TKEY' (Initial key)                                '1B'
'TPE1' (Lead performer(s)/Soloist(s))               'Shelby Lynne'
'TPE2' (Band/orchestra/accompaniment)               'Shelby Lynne'
'TPOS' (Part of a set)                              '1/1'
'TPUB' (Publisher)                                  'Mercury'
'TRCK' (Track number/Position in set)               '7/16'
'TSSE' (Software/Hardware and settings used for encoding)  'iTunes 11.4.0.18'
'TXXX:Q-BUSY'                                       '3'
'TXXX:Q-CHART'                                      '2'
'TXXX:Q-GRIT'                                       '1'
'TXXX:Q-HAP'                                        '2'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '1'
'TXXX:Q-LOCALNESS'                                  '1'
'TXXX:Q-MIXBEAT'                                    '2'
'TXXX:Q-OLDST'                                      '3'
'TXXX:Q-PLAY'                                       '2'
'TXXX:Q-SYN'                                        '2'
'TXXX:Q-UNU'                                        '1'
'TXXX:discogstags'                                  ['blues rock', 'country rock', 'rock']
'TXXX:lastfmtags'                                   ['lush', 'country', 'alt country', 'female vocalists', 'singer songwriter']
'TXXX:q-bass'                                       '4'
'TXXX:q-drums'                                      '1'
'TXXX:q-other'                                      '3'
'TXXX:q-piano'                                      '1'
'TXXX:q-vocals'                                     '3'
'TXXX:replaygain_track_gain'                        '+2.21 dB'
'TXXX:replaygain_track_peak'                        '0.566692'

========================== row from database ==========================
                                              'id'  1516992
                                            'path'  /data/Music/Bulk/00blues-jazz-exotica-oldies-country/I Am Shelby Lynne/07 Lookin_ Up.mp3
                                         'working'  None
                                         'bitrate'  320
                                    'duration_sec'  209
                                           'genre'  ifs-songwriter-country
                                        'filesize'  8914086
                                           'mtime'  1638554924
                                   'redo_metaread'  0
                                        'rest_str'   00blues jazz exotica oldies country 07 Lookin_ ifs songwriter country
                                      'tag_artist'  Shelby Lynne
                                     'tag_release'  I Am Shelby Lynne
                                       'tag_title'  Lookin' Up
                                             'bpm'  137.0
                                    'search_title'  'lookin':1,2 'up':3
                                   'search_artist'  'lynne':2 'shelby':1
                                  'search_release'  'am':2 'i':1 'lynne':4 'shelby':3
                                     'search_rest'  'country':4 'exotica':2 'ifs':6 'jazz':1 'lookin':5 'oldies':3 'songwriter':7
                                    'search_combo'  'am':7C 'country':13 'exotica':11 'i':6C 'ifs':15 'jazz':10 'lookin':1A,2A,14 'lynne':5B,9C 'oldies':12 'shelby':4B,8C 'songwriter':16 'up':3A
                                    'tag_tracknum'  7
                                      'num_images'  1
                                             'key'  1B
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-3', 'Q-LOCALNESS-1', 'q-piano-1', 'Q-MIXBEAT-2', 'Q-OLDST-3', 'Q-GRIT-1', 'Q-UNU-1', 'Q-JZFKS-1', 'Q-CHART-2', 'q-drums-1', 'Q-SYN-2', 'q-other-3', 'Q-BUSY-3', 'Q-HAP-2', 'Q-PLAY-2', 'q-bass-4']
                                      'lastfmtags'  ['lush', 'country', 'alt country', 'female vocalists', 'singer songwriter']
                                        'tag_date'  1999
                                     'discogstags'  ['blues rock', 'country rock', 'rock']

============================== file details ==============================
                                           'mtime'  1638554924.0080905  (2021-12-03 19:08:44)
                             'size'  8914086