======================== unified (from filesystem) ========================
                                         'bitrate'  '320.0'
                                        'duration'  '62'
                                          'artist'  'The Nazz'
                                     'text_people'  ''
                                         'release'  'Psychedelic Promos Radio Spots Vol. 1'
                                           'title'  'Band Promo Spot # 2 (Tommy Truckdriver)'
                                           'quals'  ("['Q-HAP-3', 'Q-UNU-1', 'Q-LOCALNESS-1', 'Q-JZFKS-1', 'Q-HHRNBTT-1', "
 "'Q-OLDST-2', 'q-syn-2', 'q-bass-3', 'q-busy-3', 'q-grit-1', 'q-play-2', "
 "'q-chart-1', 'q-drums-2', 'q-other-3', 'q-piano-1', 'q-vocals-4', "
 "'q-mixbeat-1']")
                                      'lastfmtags'  "['garage rock', 'psychedelic rock', 'psychedelic', '60s', 'garage']"
                                     'discogstags'  "['garage rock', 'rock']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  ''
                                      'tracktotal'  ''
                                            'date'  '1970'
                                        'comments'  ''
                                           'genre'  'nonmusic-commercials'
                                             'bpm'  '137.292'
                                             'key'  '12B'
                                        'acoustid'  ''
rest: ''

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

'TALB' (Album/Movie/Show title)                     'Psychedelic Promos Radio Spots Vol. 1'
'TBPM' (BPM (beats per minute))                     '137.292'
'TCON' (Content type, a.k.a. Genre)                 'nonmusic-commercials'
'TDRC' (Recording time)                             '1970'
'TIT2' (Title/songname/content description)         'Band Promo Spot # 2 (Tommy Truckdriver)'
'TKEY' (Initial key)                                '12B'
'TPE1' (Lead performer(s)/Soloist(s))               'The Nazz'
'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:discogstags'                                  ['garage rock', 'rock']
'TXXX:lastfmtags'                                   ['garage rock', 'psychedelic rock', 'psychedelic', '60s', 'garage']
'TXXX:q-bass'                                       '3'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '1'
'TXXX:q-drums'                                      '2'
'TXXX:q-grit'                                       '1'
'TXXX:q-mixbeat'                                    '1'
'TXXX:q-other'                                      '3'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '2'
'TXXX:q-syn'                                        '2'
'TXXX:q-vocals'                                     '4'
'TXXX:replaygain_track_gain'                        '-0.80 dB'
'TXXX:replaygain_track_peak'                        '0.504096'
'TXXX:tracknum'                                     '32'

========================== row from database ==========================
                                              'id'  483019
                                            'path'  /data/Music/Bulk/0nonmusic/PsychedelicPromosRadioSpotsVol.1/32. The Nazz - Band Promo Spot # 2 (Tommy Truckdriver).mp3
                                         'working'  None
                                         'bitrate'  320
                                    'duration_sec'  62
                                           'genre'  nonmusic-commercials
                                        'filesize'  2493256
                                           'mtime'  1620525598
                                   'redo_metaread'  0
                                        'rest_str'   0nonmusic PsychedelicPromosRadioSpotsVol.1 32. nonmusic commercials
                                      'tag_artist'  The Nazz
                                     'tag_release'  Psychedelic Promos Radio Spots Vol. 1
                                       'tag_title'  Band Promo Spot # 2 (Tommy Truckdriver)
                                             'bpm'  137.292
                                    'search_title'  '2':4 'band':1 'promo':2 'spot':3 'tommy':5,6 'truckdriver':7,8
                                   'search_artist'  'nazz':2 'the':1
                                  'search_release'  '1':7 'promos':2 'psychedelic':1 'radio':3 'spots':4 'vol':5,6
                                     'search_rest'  '0nonmusic':1 '1':3,14 '32':5,6 'commercials':8 'nonmusic':7 'promos':10 'psychedelic':9 'psychedelicpromosradiospotsvol':2 'psychedelicpromosradiospotsvol1':4 'radio':11 'spots':12 'vol':13 'vol1':15
                                    'search_combo'  '0nonmusic':18 '1':17C,20,31 '2':4A '32':22,23 'band':1A 'commercials':25 'nazz':10B 'nonmusic':24 'promo':2A 'promos':12C,27 'psychedelic':11C,26 'psychedelicpromosradiospotsvol':19 'psychedelicpromosradiospotsvol1':21 'radio':13C,28 'spot':3A 'spots':14C,29 'the':9B 'tommy':5A,6A 'truckdriver':7A,8A 'vol':15C,16C,30 'vol1':32
                                    'tag_tracknum'  None
                                      'num_images'  0
                                             'key'  12B
                                           '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-3', 'Q-HAP-3', 'q-bass-3', 'q-grit-1']
                                      'lastfmtags'  ['garage rock', 'psychedelic rock', 'psychedelic', '60s', 'garage']
                                        'tag_date'  1970
                                     'discogstags'  ['garage rock', 'rock']

============================== file details ==============================
                                           'mtime'  1620525597.507741  (2021-05-09 03:59:57)
                             'size'  2493256