======================== unified (from filesystem) ========================
                                         'bitrate'  '192.0'
                                        'duration'  '179'
                                          'artist'  'Arne M. Sølvberg'
                                     'text_people'  ''
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                                           'title'  'Fossegrimhallingen'
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                                      'lastfmtags'  "['folk']"
                                     'discogstags'  "['folk, world, & country']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '12'
                                      'tracktotal'  '17'
                                            'date'  '1998'
                                        'comments'  ''
                                           'genre'  'loc-eur-northern-norway'
                                             'bpm'  '108'
                                             'key'  '1B'
                                        'acoustid'  '3d6539eb-95a4-49f5-b7fa-90e117c0d59d'
rest: ''

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

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'COMM:ID3v1 Comment:XXX'                            'E00C0111+3075+17+150+8102+17'
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'COMM:SoundJam_CDDB_TrackNumber:eng'                '12'
'COMM:iTunNORM:eng'                                 (' 000002B5 00000303 00000731 000009E3 00013897 00009C57 00002DE1 00002AAB '
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'TALB' (Album/Movie/Show title)                     "Devil's Tune"
'TBPM' (BPM (beats per minute))                     '108'
'TCMP'                                              '1'
'TCON' (Content type, a.k.a. Genre)                 'loc-eur-northern-norway'
'TDOR' (Original release time)                      '1998'
'TDRC' (Recording time)                             '1998'
'TENC' (Encoded by)                                 'SoundJam v2.5.1'
'TIT2' (Title/songname/content description)         'Fossegrimhallingen'
'TKEY' (Initial key)                                '1B'
'TMED' (Media type)                                 'CD'
'TPE1' (Lead performer(s)/Soloist(s))               'Arne M. Sølvberg'
'TPE2' (Band/orchestra/accompaniment)               'Various Artists'
'TPOS' (Part of a set)                              '1/1'
'TPUB' (Publisher)                                  'Heilo'
'TRCK' (Track number/Position in set)               '12/17'
'TSO2'                                              'Various Artists'
'TSOP' (Performer sort order)                       'Sølvberg, Arne M.'
'TXXX:ASIN'                                         'B0002N8BRY'
'TXXX:Acoustid Id'                                  '3d6539eb-95a4-49f5-b7fa-90e117c0d59d'
'TXXX:Artists'                                      'Arne M. Sølvberg'
'TXXX:CATALOGNUMBER'                                'HCD 7139'
'TXXX:MusicBrainz Album Artist Id'                  '89ad4ac3-39f7-470e-963a-56509c546377'
'TXXX:MusicBrainz Album Id'                         '1f82732f-0074-4ae0-b000-1d908b1ab417'
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'TXXX:MusicBrainz Album Type'                       'album/compilation'
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'TXXX:Q-JZFKS'                                      '2'
'TXXX:Q-LOCALNESS'                                  '3'
'TXXX:Q-OLDST'                                      '2'
'TXXX:Q-UNU'                                        '2'
'TXXX:SCRIPT'                                       'Latn'
'TXXX:discogstags'                                  'folk, world, & country'
'TXXX:lastfmtags'                                   'folk'
'TXXX:mood'                                         'Acoustic/Relaxed/Happy/Not party/Not aggressive/Not electronic/Sad'
'TXXX:originalyear'                                 '1998'
'TXXX:q-bass'                                       '1'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '1'
'TXXX:q-drums'                                      '1'
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'TXXX:q-mixbeat'                                    '1'
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'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '2'
'TXXX:q-syn'                                        '1'
'TXXX:q-vocals'                                     '1'
'TXXX:replaygain_track_gain'                        '+2.14 dB'
'TXXX:replaygain_track_peak'                        '0.697771'
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========================== row from database ==========================
                                              'id'  1528213
                                            'path'  /data/Music/Bulk/00dwimp/Hardanger Fiddle (Norway)/Devil_s Tune/12 Fossegrimhallingen (The Waterfall Wizard_s Halling Tune) (Trad.).mp3
                                         'working'  None
                                         'bitrate'  192
                                    'duration_sec'  179
                                           'genre'  loc-eur-northern-norway
                                        'filesize'  4378942
                                           'mtime'  1621628504
                                   'redo_metaread'  0
                                        'rest_str'   00dwimp Hardanger Fiddle (Norway) Devil_s 12 (The Waterfall Wizard_s Halling Tune) (Trad.) loc eur northern norway
                                      'tag_artist'  Arne M. Sølvberg
                                     'tag_release'  Devil's Tune
                                       'tag_title'  Fossegrimhallingen
                                             'bpm'  108.0
                                    'search_title'  'fossegrimhallingen':1
                                   'search_artist'  'arne':1 'm':2,3 'solvberg':5 'sølvberg':4
                                  'search_release'  'devil':1 'devils':3 's':2 'tune':4
                                     'search_rest'  '00dwimp':1 'devil':6 'eur':19 'fiddle':3 'halling':13 'hardanger':2 'loc':18 'northern':20 'norway':4,5 's':7,12 'the':8,9 'trad':16,17 'tune':14,15 'waterfall':10 'wizard':11
                                    'search_combo'  '00dwimp':11 'arne':2B 'devil':7C,16 'devils':9C 'eur':29 'fiddle':13 'fossegrimhallingen':1A 'halling':23 'hardanger':12 'loc':28 'm':3B,4B 'northern':30 'norway':14,15 's':8C,17,22 'solvberg':6B 'sølvberg':5B 'the':18,19 'trad':26,27 'tune':10C,24,25 'waterfall':20 'wizard':21
                                    'tag_tracknum'  12
                                      'num_images'  1
                                             'key'  1B
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-1', 'Q-LOCALNESS-3', 'q-piano-1', 'q-mixbeat-1', 'q-play-2', 'Q-OLDST-2', 'Q-UNU-2', 'Q-JZFKS-2', 'q-busy-3', 'q-drums-1', 'q-syn-1', 'q-chart-1', 'q-other-4', 'Q-HAP-3', 'q-bass-1', 'q-grit-2']
                                      'lastfmtags'  ['folk']
                                        'tag_date'  1998
                                     'discogstags'  ['folk, world, & country']

============================== file details ==============================
                                           'mtime'  1621628503.5824862  (2021-05-21 22:21:43)
                             'size'  4378942