======================== unified (from filesystem) ========================
                                         'bitrate'  '160.0'
                                        'duration'  '217'
                                          'artist'  'Rare Earth'
                                     'text_people'  ''
                                         'release'  'Billboard Top Pop Singles of 1970'
                                           'title'  "(I Know) I'm Losing You"
                                           'quals'  ("['Q-LOCALNESS-1', 'Q-HHRNBTT-1', 'Q-JZFKS-3', 'Q-UNU-1', 'Q-OLDST-2', "
 "'q-syn-2', 'q-bass-4', 'q-busy-3', 'q-grit-2', 'q-play-2', 'q-chart-3', "
 "'q-drums-3', 'q-other-2', 'q-piano-1', 'q-vocals-3', 'q-mixbeat-2']")
                                      'lastfmtags'  "['60s', 'motown', 'soul', 'rock', 'funk', 'classic rock']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '55'
                                      'tracktotal'  ''
                                            'date'  '1970'
                                        'comments'  ''
                                           'genre'  'electronic-generic or radio-unsorted;rock-cppex;set-pl-billboard'
                                             'bpm'  '133.844'
                                             'key'  '12A'
                                        'acoustid'  ''
rest: ''

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

'COMM:ID3v1 Comment:XXX'                            'Billboard'
'TALB' (Album/Movie/Show title)                     'Billboard Top Pop Singles of 1970'
'TBPM' (BPM (beats per minute))                     '133.844'
'TCON' (Content type, a.k.a. Genre)                 ['electronic-generic or radio-unsorted', 'rock-cppex', 'set-pl-billboard']
'TDRC' (Recording time)                             '1970'
'TIT2' (Title/songname/content description)         "(I Know) I'm Losing You"
'TKEY' (Initial key)                                '12A'
'TPE1' (Lead performer(s)/Soloist(s))               'Rare Earth'
'TPE2' (Band/orchestra/accompaniment)               'Various Artists'
'TRCK' (Track number/Position in set)               '55'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '3'
'TXXX:Q-LOCALNESS'                                  '1'
'TXXX:Q-OLDST'                                      '2'
'TXXX:Q-UNU'                                        '1'
'TXXX:lastfmtags'                                   ['60s', 'motown', 'soul', 'rock', 'funk', 'classic rock']
'TXXX:q-bass'                                       '4'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '3'
'TXXX:q-drums'                                      '3'
'TXXX:q-grit'                                       '2'
'TXXX:q-mixbeat'                                    '2'
'TXXX:q-other'                                      '2'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '2'
'TXXX:q-syn'                                        '2'
'TXXX:q-vocals'                                     '3'
'TXXX:replaygain_track_gain'                        '+0.16 dB'
'TXXX:replaygain_track_peak'                        '0.498180'

========================== row from database ==========================
                                              'id'  1510289
                                            'path'  /data/Music/Bulk/00poprockelectronic/Billboard/Billboard Top100/1970/055 - Rare Earth - (I Know) I_m Losing You.mp3
                                         'working'  None
                                         'bitrate'  160
                                    'duration_sec'  217
                                           'genre'  electronic-generic or radio-unsorted;rock-cppex;set-pl-billboard
                                        'filesize'  4357173
                                           'mtime'  1620737067
                                   'redo_metaread'  0
                                        'rest_str'   00poprockelectronic Top100 055 I_m electronic generic or radio unsorted;rock cppex;set pl billboard
                                      'tag_artist'  Rare Earth
                                     'tag_release'  Billboard Top Pop Singles of 1970
                                       'tag_title'  (I Know) I'm Losing You
                                             'bpm'  133.844
                                    'search_title'  'i':1,2,5 'im':7 'know':3,4 'losing':8 'm':6 'you':9
                                   'search_artist'  'earth':2 'rare':1
                                  'search_release'  '1970':6 'billboard':1 'of':5 'pop':3 'singles':4 'top':2
                                     'search_rest'  '00poprockelectronic':1 'billboard':18 'cppex':13,15 'electronic':5 'generic':6 'i':3 'm':4 'or':7 'pl':17 'radio':8 'rock':10,12 'set':14,16 'top100':2 'unsorted':9,11
                                    'search_combo'  '00poprockelectronic':18 '1970':17C 'billboard':12C,35 'cppex':30,32 'earth':11B 'electronic':22 'generic':23 'i':1A,2A,5A,20 'im':7A 'know':3A,4A 'losing':8A 'm':6A,21 'of':16C 'or':24 'pl':34 'pop':14C 'radio':25 'rare':10B 'rock':27,29 'set':31,33 'singles':15C 'top':13C 'top100':19 'unsorted':26,28 'you':9A
                                    'tag_tracknum'  55
                                      'num_images'  0
                                             'key'  12A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-3', 'Q-LOCALNESS-1', 'q-piano-1', 'q-mixbeat-2', 'q-play-2', 'Q-OLDST-2', 'Q-UNU-1', 'Q-JZFKS-3', 'q-busy-3', 'q-drums-3', 'q-syn-2', 'q-chart-3', 'q-other-2', 'q-bass-4', 'q-grit-2']
                                      'lastfmtags'  ['60s', 'motown', 'soul', 'rock', 'funk', 'classic rock']
                                        'tag_date'  1970
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1620737066.7660637  (2021-05-11 14:44:26)
                             'size'  4357173