======================== unified (from filesystem) ========================
                                         'bitrate'  '212.194'
                                        'duration'  '161'
                                          'artist'  'Ernest Tubbs & Loretta Lynn'
                                     'text_people'  ''
                                         'release'  ''
                                           'title'  'Mr, Mrs Used To Be'
                                           'quals'  ("['Q-HAP-3', 'Q-JZFKS-1', 'Q-UNU-1', 'Q-HHRNBTT-1', 'Q-LOCALNESS-3', "
 "'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-3', 'q-piano-1', 'q-vocals-4', "
 "'q-mixbeat-1']")
                                      'lastfmtags'  ("['country', 'female vocalists', 'classic country', 'singer-songwriter', "
 "'americana']")
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  ''
                                      'tracktotal'  ''
                                            'date'  '1945'
                                        'comments'  ''
                                           'genre'  'loc-namerica-country'
                                             'bpm'  '129.730'
                                             'key'  '12B'
                                        'acoustid'  ''
rest: ''

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

'TBPM' (BPM (beats per minute))                     '129.730'
'TCON' (Content type, a.k.a. Genre)                 'loc-namerica-country'
'TDRC' (Recording time)                             '1945'
'TIT2' (Title/songname/content description)         'Mr, Mrs Used To Be'
'TKEY' (Initial key)                                '12B'
'TPE1' (Lead performer(s)/Soloist(s))               'Ernest Tubbs & Loretta Lynn'
'TSSE' (Software/Hardware and settings used for encoding)  'Lavf56.40.101'
'TXXX:DeviceConformanceTemplate'                    'L1'
'TXXX:IsVBR'                                        '1'
'TXXX:Length'                                       '161696'
'TXXX:Q-HAP'                                        '3'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '1'
'TXXX:Q-LOCALNESS'                                  '3'
'TXXX:Q-OLDST'                                      '1'
'TXXX:Q-UNU'                                        '1'
'TXXX:lastfmtags'                                   ['country',
 'female vocalists',
 'classic country',
 'singer-songwriter',
 'americana']
'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'                                      '3'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '2'
'TXXX:q-syn'                                        '1'
'TXXX:q-vocals'                                     '4'
'TXXX:replaygain_track_gain'                        '+0.62 dB'
'TXXX:replaygain_track_peak'                        '0.527592'

========================== row from database ==========================
                                              'id'  968187
                                            'path'  /data/Music/Bulk/00blues-jazz-exotica-oldies-country/Old Country Music/Ernest Tubb & Loretta Lynn - Mr and Mrs Used to Be.wma.mp3
                                         'working'  None
                                         'bitrate'  212
                                    'duration_sec'  161
                                           'genre'  loc-namerica-country
                                        'filesize'  4294656
                                           'mtime'  1621628064
                                   'redo_metaread'  0
                                        'rest_str'   00blues jazz exotica oldies country Old Country Music and to Be.wma loc namerica country
                                      'tag_artist'  Ernest Tubbs & Loretta Lynn
                                     'tag_release'  None
                                       'tag_title'  Mr, Mrs Used To Be
                                             'bpm'  129.73
                                    'search_title'  'be':6 'mr':1,2 'mrs':3 'to':5 'used':4
                                   'search_artist'  'ernest':1 'loretta':3 'lynn':4 'tubbs':2
                                  'search_release'  
                                     'search_rest'  'and':7 'be':9 'bewma':11 'country':4 'exotica':2 'jazz':1 'loc':12 'music':6 'namerica':13 'old':5 'oldies':3 'to':8 'wma':10
                                    'search_combo'  'and':17 'be':6A,19 'bewma':21 'country':14 'ernest':7B 'exotica':12 'jazz':11 'loc':22 'loretta':9B 'lynn':10B 'mr':1A,2A 'mrs':3A 'music':16 'namerica':23 'old':15 'oldies':13 'to':5A,18 'tubbs':8B 'used':4A 'wma':20
                                    'tag_tracknum'  None
                                      'num_images'  0
                                             'key'  12B
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-4', 'Q-LOCALNESS-3', 'q-piano-1', 'q-mixbeat-1', 'q-play-2', 'Q-OLDST-1', 'Q-UNU-1', 'Q-JZFKS-1', 'q-busy-2', 'q-drums-1', 'q-syn-1', 'q-chart-2', 'q-other-3', 'Q-HAP-3', 'q-bass-1', 'q-grit-2']
                                      'lastfmtags'  ['country', 'female vocalists', 'classic country', 'singer-songwriter', 'americana']
                                        'tag_date'  1945
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1621628064.4000547  (2021-05-21 22:14:24)
                             'size'  4294656