======================== unified (from filesystem) ========================
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                                        'duration'  '252'
                                          'artist'  'Hawkwind'
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                                           'title'  'Silver Machine'
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                                      'lastfmtags'  "['progressive rock', 'space rock', 'psychedelic rock', 'psychedelic', 'rock']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
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                                     'tracknumber'  '16'
                                      'tracktotal'  '20'
                                            'date'  '2008'
                                        'comments'  ''
                                           'genre'  'electronic-experimental-psych;set-pl-mor'
                                             'bpm'  '87.5'
                                             'key'  '3A'
                                        'acoustid'  ''
rest: ''

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

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'TBPM' (BPM (beats per minute))                     '87.5'
'TCON' (Content type, a.k.a. Genre)                 ['electronic-experimental-psych', 'set-pl-mor']
'TDRC' (Recording time)                             '2008'
'TENC' (Encoded by)                                 'iTunes 8.0.1.11'
'TIT2' (Title/songname/content description)         'Silver Machine'
'TKEY' (Initial key)                                '3A'
'TPE1' (Lead performer(s)/Soloist(s))               'Hawkwind'
'TPE2' (Band/orchestra/accompaniment)               'Various Artists'
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'TXXX:Q-UNU'                                        '1'
'TXXX:lastfmtags'                                   ['progressive rock', 'space rock', 'psychedelic rock', 'psychedelic', 'rock']
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'TXXX:replaygain_track_peak'                        '0.614328'

========================== row from database ==========================
                                              'id'  1375058
                                            'path'  /data/Music/Bulk/00exnnpjpsprgttidm/Donovan - a monstrous psychedelic bubble exloding/2-16 silver machine.mp3
                                         'working'  None
                                         'bitrate'  160
                                    'duration_sec'  252
                                           'genre'  electronic-experimental-psych;set-pl-mor
                                        'filesize'  5046540
                                           'mtime'  1637329383
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                                        'rest_str'   00exnnpjpsprgttidm Donovan monstrous psychedelic bubble exloding 2 16 silver machine electronic experimental psych;set pl mor
                                      'tag_artist'  Hawkwind
                                     'tag_release'  A Monstrous Psychedelic Bubble Exloding In Your Mind Vol.1 - Cosmic Space Music
                                       'tag_title'  Silver Machine
                                             'bpm'  87.5
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                                   'search_artist'  'hawkwind':1
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                                     'search_rest'  '2':6 'bubble':4 'donovan':1 'electronic':9 'exloding':5 'experimental':10 'machine':8 'monstrous':2 'mor':16 'pl':15 'psych':11,13 'psychedelic':3 'set':12,14 'silver':7
                                    'search_combo'  '1':13C '2':23 'a':4C 'bubble':7C,21 'cosmic':15C 'donovan':18 'electronic':26 'exloding':8C,22 'experimental':27 'hawkwind':3B 'in':9C 'machine':2A,25 'mind':11C 'monstrous':5C,19 'mor':33 'music':17C 'pl':32 'psych':28,30 'psychedelic':6C,20 'set':29,31 'silver':1A,24 'space':16C 'vol':12C 'vol1':14C 'your':10C
                                    'tag_tracknum'  16
                                      'num_images'  0
                                             'key'  3A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-2', 'Q-LOCALNESS-1', 'q-piano-1', 'q-mixbeat-2', 'q-play-3', 'Q-OLDST-3', 'Q-UNU-1', 'Q-JZFKS-1', 'q-busy-3', 'q-drums-3', 'q-syn-2', 'q-chart-1', 'q-other-3', 'Q-HAP-2', 'q-bass-3', 'q-grit-3']
                                      'lastfmtags'  ['progressive rock', 'space rock', 'psychedelic rock', 'psychedelic', 'rock']
                                        'tag_date'  2008
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1637329383.147172  (2021-11-19 14:43:03)
                             'size'  5046540