======================== unified (from filesystem) ========================
                                         'bitrate'  '320.0'
                                        'duration'  '84'
                                          'artist'  'The In Sound With Roger McGuinn'
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                                           'title'  'The In Sound With Roger McGuinn'
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                                            'date'  '1970'
                                        'comments'  ''
                                           'genre'  'nonmusic-commercials'
                                             'bpm'  '134.645'
                                             'key'  '9A'
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rest: ''

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

'TALB' (Album/Movie/Show title)                     'Psychedelic Promos Radio Spots Vol. 2'
'TBPM' (BPM (beats per minute))                     '134.645'
'TCON' (Content type, a.k.a. Genre)                 'nonmusic-commercials'
'TDRC' (Recording time)                             '1970'
'TIT2' (Title/songname/content description)         'The In Sound With Roger McGuinn'
'TKEY' (Initial key)                                '9A'
'TPE1' (Lead performer(s)/Soloist(s))               'The In Sound With Roger McGuinn'
'TXXX:Q-HAP'                                        '3'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '1'
'TXXX:Q-LOCALNESS'                                  '1'
'TXXX:Q-OLDST'                                      '2'
'TXXX:Q-UNU'                                        '1'
'TXXX:q-bass'                                       '4'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '1'
'TXXX:q-drums'                                      '2'
'TXXX:q-grit'                                       '1'
'TXXX:q-mixbeat'                                    '1'
'TXXX:q-other'                                      '2'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '2'
'TXXX:q-syn'                                        '2'
'TXXX:q-vocals'                                     '4'
'TXXX:replaygain_track_gain'                        '+1.08 dB'
'TXXX:replaygain_track_peak'                        '0.494941'
'TXXX:tracknum'                                     '27'

========================== row from database ==========================
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                                            'path'  /data/Music/Bulk/0nonmusic/PsychedelicPromosRadioSpotsVol.2/27. The In Sound With Roger McGuinn.mp3
                                         'working'  None
                                         'bitrate'  320
                                    'duration_sec'  84
                                           'genre'  nonmusic-commercials
                                        'filesize'  3378238
                                           'mtime'  1620525658
                                   'redo_metaread'  0
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                                     'tag_release'  Psychedelic Promos Radio Spots Vol. 2
                                       'tag_title'  The In Sound With Roger McGuinn
                                             'bpm'  134.645
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                                     'search_rest'  '0nonmusic':1 '2':3,14 '27':5,6 'commercials':8 'nonmusic':7 'promos':10 'psychedelic':9 'psychedelicpromosradiospotsvol':2 'psychedelicpromosradiospotsvol2':4 'radio':11 'spots':12 'vol':13 'vol2':15
                                    'search_combo'  '0nonmusic':24 '2':23C,26,37 '27':28,29 'commercials':31 'guinn':8A,16B 'in':2A,10B 'mc':7A,15B 'mcguinn':6A,14B 'nonmusic':30 'promos':18C,33 'psychedelic':17C,32 'psychedelicpromosradiospotsvol':25 'psychedelicpromosradiospotsvol2':27 'radio':19C,34 'roger':5A,13B 'sound':3A,11B 'spots':20C,35 'the':1A,9B 'vol':21C,22C,36 'vol2':38 'with':4A,12B
                                    'tag_tracknum'  None
                                      'num_images'  0
                                             'key'  9A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-4', 'Q-LOCALNESS-1', 'q-piano-1', 'q-mixbeat-1', 'q-play-2', 'Q-OLDST-2', 'Q-UNU-1', 'Q-JZFKS-1', 'q-busy-3', 'q-drums-2', 'q-syn-2', 'q-chart-1', 'q-other-2', 'Q-HAP-3', 'q-bass-4', 'q-grit-1']
                                      'lastfmtags'  []
                                        'tag_date'  1970
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1620525657.8917146  (2021-05-09 04:00:57)
                             'size'  3378238