======================== unified (from filesystem) ========================
                                         'bitrate'  '123.837'
                                        'duration'  '143'
                                          'artist'  'YOUR OLD LOVE LETTERS'
                                     'text_people'  ''
                                         'release'  '2Ufrom south sea island JIM'
                                           'title'  '1959 by Jim Reeves'
                                           'quals'  ("['Q-HAP-3', 'Q-JZFKS-1', 'Q-UNU-2', 'Q-HHRNBTT-1', 'Q-LOCALNESS-3', "
 "'Q-OLDST-1', 'q-syn-1', 'q-bass-3', 'q-busy-2', 'q-grit-2', 'q-play-2', "
 "'q-chart-2', 'q-drums-1', 'q-other-2', 'q-piano-1', 'q-vocals-4', "
 "'q-mixbeat-1']")
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  ''
                                      'tracktotal'  ''
                                            'date'  '1945'
                                        'comments'  ''
                                           'genre'  'loc-namerica-country'
                                             'bpm'  '144.233'
                                             'key'  '11B'
                                        'acoustid'  ''
rest: ''

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

'TALB' (Album/Movie/Show title)                     '2Ufrom south sea island JIM'
'TBPM' (BPM (beats per minute))                     '144.233'
'TCON' (Content type, a.k.a. Genre)                 'loc-namerica-country'
'TDRC' (Recording time)                             '1945'
'TIT2' (Title/songname/content description)         '1959 by Jim Reeves'
'TKEY' (Initial key)                                '11B'
'TPE1' (Lead performer(s)/Soloist(s))               'YOUR OLD LOVE LETTERS'
'TSSE' (Software/Hardware and settings used for encoding)  'Lavf56.40.101'
'TXXX:DeviceConformanceTemplate'                    'L1'
'TXXX:IsVBR'                                        '1'
'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:q-bass'                                       '3'
'TXXX:q-busy'                                       '2'
'TXXX:q-chart'                                      '2'
'TXXX:q-drums'                                      '1'
'TXXX:q-grit'                                       '2'
'TXXX:q-mixbeat'                                    '1'
'TXXX:q-other'                                      '2'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '2'
'TXXX:q-syn'                                        '1'
'TXXX:q-vocals'                                     '4'
'TXXX:replaygain_track_gain'                        '+0.33 dB'
'TXXX:replaygain_track_peak'                        '0.580097'

========================== row from database ==========================
                                              'id'  967350
                                            'path'  /data/Music/Bulk/00blues-jazz-exotica-oldies-country/Old Country Music/Jim Reeves - YOUR OLD LOVE LETTERS 1959.wma.mp3
                                         'working'  None
                                         'bitrate'  123
                                    'duration_sec'  143
                                           'genre'  loc-namerica-country
                                        'filesize'  2224557
                                           'mtime'  1621628191
                                   'redo_metaread'  0
                                        'rest_str'   00blues jazz exotica oldies country Old Country Music 1959.wma loc namerica country
                                      'tag_artist'  YOUR OLD LOVE LETTERS
                                     'tag_release'  2Ufrom south sea island JIM
                                       'tag_title'  1959 by Jim Reeves
                                             'bpm'  144.233
                                    'search_title'  '1959':1 'by':2 'jim':3 'reeves':4
                                   'search_artist'  'letters':4 'love':3 'old':2 'your':1
                                  'search_release'  '2ufrom':1 'island':4 'jim':5 'sea':3 'south':2
                                     'search_rest'  '1959':7 '1959wma':9 'country':4 'exotica':2 'jazz':1 'loc':10 'music':6 'namerica':11 'old':5 'oldies':3 'wma':8
                                    'search_combo'  '1959':1A,20 '1959wma':22 '2ufrom':9C 'by':2A 'country':17 'exotica':15 'island':12C 'jazz':14 'jim':3A,13C 'letters':8B 'loc':23 'love':7B 'music':19 'namerica':24 'old':6B,18 'oldies':16 'reeves':4A 'sea':11C 'south':10C 'wma':21 'your':5B
                                    'tag_tracknum'  None
                                      'num_images'  0
                                             'key'  11B
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-4', 'Q-LOCALNESS-3', 'q-piano-1', 'q-mixbeat-1', 'q-play-2', 'Q-OLDST-1', 'Q-UNU-2', 'Q-JZFKS-1', 'q-busy-2', 'q-drums-1', 'q-syn-1', 'q-chart-2', 'q-other-2', 'Q-HAP-3', 'q-bass-3', 'q-grit-2']
                                      'lastfmtags'  []
                                        'tag_date'  1945
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1621628190.8344572  (2021-05-21 22:16:30)
                             'size'  2224557