======================== unified (from filesystem) ========================
                                         'bitrate'  '128.0'
                                        'duration'  '169'
                                          'artist'  'George Gershwin'
                                     'text_people'  ''
                                         'release'  "From Gershwin's Time: The Original Sounds of George Gershwin 1920-1945"
                                           'title'  "It Ain't Necessarily So"
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                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '23'
                                      'tracktotal'  '25'
                                            'date'  '1935'
                                        'comments'  ''
                                           'genre'  'prerock-swing'
                                             'bpm'  '123.106'
                                             'key'  '6A'
                                        'acoustid'  '1d036027-d541-4e1a-9d4a-871cb1b54f2e'
rest: ''

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'TALB' (Album/Movie/Show title)                     "From Gershwin's Time: The Original Sounds of George Gershwin 1920-1945"
'TBPM' (BPM (beats per minute))                     '123.106'
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'TCON' (Content type, a.k.a. Genre)                 'prerock-swing'
'TDOR' (Original release time)                      '1998'
'TDRC' (Recording time)                             '1935'
'TIT2' (Title/songname/content description)         "It Ain't Necessarily So"
'TKEY' (Initial key)                                '6A'
'TMED' (Media type)                                 'CD'
'TPE1' (Lead performer(s)/Soloist(s))               'Leo Reisman & His Orchestra'
'TPE2' (Band/orchestra/accompaniment)               'George Gershwin'
'TPOS' (Part of a set)                              '1/2'
'TPUB' (Publisher)                                  'Sony Classical'
'TRCK' (Track number/Position in set)               '23/25'
'TSO2'                                              'Gershwin, George'
'TSOP' (Performer sort order)                       'Reisman, Leo & His Orchestra'
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'TXXX:Acoustid Id'                                  '1d036027-d541-4e1a-9d4a-871cb1b54f2e'
'TXXX:BARCODE'                                      '074646064825'
'TXXX:CATALOGNUMBER'                                'MH2K 60648'
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'TXXX:Q-LOCALNESS'                                  '1'
'TXXX:Q-OLDST'                                      '1'
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'TXXX:lastfmtags'                                   ['composers', 'piano', 'jazz', 'composer', 'classical']
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========================== row from database ==========================
                                              'id'  1518955
                                            'path'  /data/Music/Bulk/00blues-jazz-exotica-oldies-country/00oldiepop/1920s and 1930s popular/Leo Reisman & His Casino Royal Orchestra - It Ain_t Necessary So 1935.mp3
                                         'working'  None
                                         'bitrate'  128
                                    'duration_sec'  169
                                           'genre'  prerock-swing
                                        'filesize'  2787569
                                           'mtime'  1620559657
                                   'redo_metaread'  0
                                        'rest_str'   00blues jazz exotica oldies country 00oldiepop 1920s and 1930s popular Leo Reisman & His Casino Royal Orchestra Ain_t Necessary 1935 prerock swing
                                      'tag_artist'  George Gershwin
                                     'tag_release'  From Gershwin's Time: The Original Sounds of George Gershwin 1920-1945
                                       'tag_title'  It Ain't Necessarily So
                                             'bpm'  123.106
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                                   'search_artist'  'george':1 'gershwin':2
                                  'search_release'  '1920':13 '19201945':15 '1945':14 'from':1 'george':11 'gershwin':2,12 'gershwins':4 'of':10 'original':8 's':3 'sounds':9 'the':7 'time':5,6
                                     'search_rest'  '00oldiepop':5 '1920s':6 '1930s':8 '1935':19 'ain':16 'and':7 'casino':13 'country':4 'exotica':2 'his':12 'jazz':1 'leo':10 'necessary':18 'oldies':3 'orchestra':15 'popular':9 'prerock':20 'reisman':11 'royal':14 'swing':21 't':17
                                    'search_combo'  '00oldiepop':28 '1920':21C '19201945':23C '1920s':29 '1930s':31 '1935':42 '1945':22C 'ain':2A,39 'aint':4A 'and':30 'casino':36 'country':27 'exotica':25 'from':9C 'george':7B,19C 'gershwin':8B,10C,20C 'gershwins':12C 'his':35 'it':1A 'jazz':24 'leo':33 'necessarily':5A 'necessary':41 'of':18C 'oldies':26 'orchestra':38 'original':16C 'popular':32 'prerock':43 'reisman':34 'royal':37 's':11C 'so':6A 'sounds':17C 'swing':44 't':3A,40 'the':15C 'time':13C,14C
                                    'tag_tracknum'  23
                                      'num_images'  1
                                             'key'  6A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-4', 'Q-LOCALNESS-1', 'q-piano-1', 'q-mixbeat-1', 'q-play-2', 'Q-OLDST-1', 'Q-UNU-1', 'Q-JZFKS-2', 'q-busy-2', 'q-drums-1', 'q-syn-1', 'q-chart-2', 'q-other-2', 'Q-HAP-3', 'q-bass-2', 'q-grit-1']
                                      'lastfmtags'  ['composers', 'piano', 'jazz', 'composer', 'classical']
                                        'tag_date'  1935
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1620559657.0401084  (2021-05-09 13:27:37)
                             'size'  2787569