I'm not sure if this is the correct place to post.
But as i was doing my research to encode my music I found out that the included fdkaac.exe that comes in fdkaac addon is outdated, the version installed was 0.2.0 the current version is 0.6.2.
Correction, the current version which i had found 0.2.0 came from https://www.dbpoweramp.com/codec-central-m4a.htm,
but there is a newer version in another topic here which for some reason i didn't find before.