======================== unified (from filesystem) ========================
                                         'bitrate'  '144.597'
                                        'duration'  '99'
                                          'artist'  'artist'
                                     'text_people'  ''
                                         'release'  ''
                                           'title'  ''
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 "'Q-OLDST-1', 'q-syn-1', 'q-bass-1', 'q-busy-2', 'q-grit-2', 'q-play-2', "
 "'q-chart-2', 'q-drums-1', 'q-other-1', 'q-piano-1', 'q-vocals-4', "
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                                      'lastfmtags'  "['80s', 'aor', 'rock']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '4'
                                      'tracktotal'  ''
                                            'date'  '1945'
                                        'comments'  ''
                                           'genre'  'loc-namerica-country'
                                             'bpm'  '145.685'
                                             'key'  '5B'
                                        'acoustid'  ''
rest: ''

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

'TBPM' (BPM (beats per minute))                     '145.685'
'TCON' (Content type, a.k.a. Genre)                 'loc-namerica-country'
'TDRC' (Recording time)                             '1945'
'TKEY' (Initial key)                                '5B'
'TPE2' (Band/orchestra/accompaniment)               'artist'
'TRCK' (Track number/Position in set)               '4'
'TSSE' (Software/Hardware and settings used for encoding)  'Lavf56.40.101'
'TXXX:DeviceConformanceTemplate'                    'L1'
'TXXX:IsVBR'                                        '1'
'TXXX:Length'                                       '99813'
'TXXX:Q-HAP'                                        '3'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '1'
'TXXX:Q-LOCALNESS'                                  '3'
'TXXX:Q-OLDST'                                      '1'
'TXXX:Q-UNU'                                        '2'
'TXXX:WM/OriginalReleaseTime'                       '1950'
'TXXX:lastfmtags'                                   ['80s', 'aor', 'rock']
'TXXX:q-bass'                                       '1'
'TXXX:q-busy'                                       '2'
'TXXX:q-chart'                                      '2'
'TXXX:q-drums'                                      '1'
'TXXX:q-grit'                                       '2'
'TXXX:q-mixbeat'                                    '1'
'TXXX:q-other'                                      '1'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '2'
'TXXX:q-syn'                                        '1'
'TXXX:q-vocals'                                     '4'
'TXXX:replaygain_track_gain'                        '-0.47 dB'
'TXXX:replaygain_track_peak'                        '0.500018'

========================== row from database ==========================
                                              'id'  967756
                                            'path'  /data/Music/Bulk/00blues-jazz-exotica-oldies-country/Old Country Music/Eddy Dean - SONG OF THE TRAIL 1950.wma.mp3
                                         'working'  None
                                         'bitrate'  144
                                    'duration_sec'  99
                                           'genre'  loc-namerica-country
                                        'filesize'  1808503
                                           'mtime'  1621628064
                                   'redo_metaread'  0
                                        'rest_str'   00blues jazz exotica oldies country Old Country Music Eddy Dean SONG OF THE TRAIL 1950.wma loc namerica country
                                      'tag_artist'  artist
                                     'tag_release'  None
                                       'tag_title'  Eddy Dean - SONG OF THE TRAIL 1950
                                             'bpm'  145.685
                                    'search_title'  '1950':7 'dean':2 'eddy':1 'of':4 'song':3 'the':5 'trail':6
                                   'search_artist'  'artist':1
                                  'search_release'  
                                     'search_rest'  '1950':13 '1950wma':15 'country':4 'dean':8 'eddy':7 'exotica':2 'jazz':1 'loc':16 'music':6 'namerica':17 'of':10 'old':5 'oldies':3 'song':9 'the':11 'trail':12 'wma':14
                                    'search_combo'  '1950':14 '1950wma':16 'artist':1B 'country':5 'dean':9 'eddy':8 'exotica':3 'jazz':2 'loc':17 'music':7 'namerica':18 'of':11 'old':6 'oldies':4 'song':10 'the':12 'trail':13 'wma':15
                                    'tag_tracknum'  4
                                      'num_images'  0
                                             'key'  5B
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-4', 'Q-LOCALNESS-3', 'q-mixbeat-1', 'q-play-2', 'Q-OLDST-1', 'Q-UNU-2', 'Q-JZFKS-1', 'q-busy-2', 'q-drums-1', 'q-piano-1', 'q-syn-1', 'q-chart-2', 'q-other-1', 'Q-HAP-3', 'q-bass-1', 'q-grit-2']
                                      'lastfmtags'  ['80s', 'aor', 'rock']
                                        'tag_date'  1945
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1621628064.396721  (2021-05-21 22:14:24)
                             'size'  1808503