======================== unified (from filesystem) ========================
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'TKEY' (Initial key)                                '9A'
'TPE1' (Lead performer(s)/Soloist(s))               'The Hafler Trio'
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'TXXX:lastfmtags'                                   ['electronic', 'industrial', 'avant garde', 'experimental', 'ambient']
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'TXXX:q-mixbeat'                                    '2'
'TXXX:q-other'                                      '4'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '3'
'TXXX:q-syn'                                        '3'
'TXXX:q-vocals'                                     '1'
'TXXX:replaygain_track_gain'                        '-1.93 dB'
'TXXX:replaygain_track_peak'                        '0.510576'

========================== row from database ==========================
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                                            'path'  /data/Music/Bulk/00poprockelectronic/00drone/The Hafler Trio - Extracts From  _just_ Physiological Intonation  - 1  Plan I.E., 2  Shortfall, 3  The Fifthmantra, 4  Three.mp3
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                                    'duration_sec'  194
                                           'genre'  electronic-drone
                                        'filesize'  3893122
                                           'mtime'  1636913424
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                                        'rest_str'   00poprockelectronic 00drone _just_ electronic drone
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                                     'tag_release'  None
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                                             'bpm'  145.2
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                                    'tag_tracknum'  None
                                      'num_images'  0
                                             'key'  9A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-1', 'Q-LOCALNESS-1', 'q-piano-1', 'q-mixbeat-2', 'q-play-3', 'Q-OLDST-3', 'Q-UNU-1', 'Q-JZFKS-1', 'q-busy-2', 'q-drums-2', 'q-syn-3', 'q-chart-1', 'q-other-4', 'Q-HAP-2', 'q-bass-1', 'q-grit-3']
                                      'lastfmtags'  ['electronic', 'industrial', 'avant garde', 'experimental', 'ambient']
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============================== file details ==============================
                                           'mtime'  1636913423.9954977  (2021-11-14 19:10:23)
                             'size'  3893122