Dash audio download with N_m3u8DL-RE, but file is not playable

[cpr0]

I managed to download an audio file using N_m3u8DL-RE, but the file cannot be played. I have tried with several players (Media player, PotPlayer, VLC) but none of them open it. I am attaching the log, maybe I am wrong somewhere. Thanks.

LOG 2024/12/27
Save Path: C:\DASH download\N\Logs
Task Start: 2024/12/27 01:08:52
Task CommandLine: N_m3u8DL-RE.exe https://westeurope.av.mk.io/default-mediakind-production/67314a29-94f8-4892-8154-88af2...ncryption=cenc) --save-name nef
01:08:52.846 INFO : N_m3u8DL-RE (Beta version) 20241201
01:08:52.857 EXTRA: ffmpeg => C:\DASH download\N\ffmpeg.exe
01:08:52.857 INFO : Loading URL: https://westeurope.av.mk.io/default-mediakind-production/67314a29-94f8-4892-8154-88af2...ncryption=cenc)
01:08:53.112 INFO : Content Matched: Dynamic Adaptive Streaming over HTTP
01:08:53.112 INFO : Parsing streams...
01:08:53.118 WARN : Writing meta json
01:08:53.121 INFO : Extracted, there are 1 streams, with 0 basic streams, 1 audio streams, 0 subtitle streams
01:08:53.122 INFO : Aud *CENC audioname_197000 | 197 Kbps | mp4a.40.2 | und | 2CH | 675 Segments | Main | ~22m29s
01:08:53.123 INFO : Parsing streams...
01:08:53.125 INFO : Selected streams:
01:08:53.125 INFO : Aud *CENC audioname_197000 | 197 Kbps | mp4a.40.2 | und | 2CH | 675 Segments | Main | ~22m29s
01:08:53.126 WARN : Writing meta json
01:08:53.128 INFO : Save Name: nef
01:08:53.130 INFO : Start downloading...Aud audioname_197000 | 197 Kbps | mp4a.40.2 | und | 2CH | Main
01:08:53.130 WARN : When CENC encryption is detected, binary merging is automatically enabled
01:08:53.166 WARN : Type: cenc
01:08:53.167 WARN : PSSH(WV): CAESEG/Tb9tXQksuLnN21tF3OkAaCW1lZGlha2luZCIkNjczMTRhMjktO TRmOC00ODkyLTgxNTQtODhhZjI2MTkxMWZhMgA=
01:08:53.168 WARN : KID: 6fd36fdb57424b2e2e7376d6d1773a40
01:08:53.168 WARN : Reading media info...
01:08:53.202 INFO : [0x1]: Audio, aac (mp4a)
01:08:59.563 INFO : Binary merging...
01:08:59.704 INFO : Done

[sarvo99]

the audio is encrypted u need to provide a valid key to nm3u8dlre so that it can be decrypted after download

[cpr0]

the audio is encrypted u need to provide a valid key to nm3u8dlre so that it can be decrypted after download

Where can I find that key?
Thanks.

[sarvo99]

use widevine proxy 2 extension