There are many recordings of the voice of Samael Aun Weor. Actually, all the lectures that he gave and were recorded were written on paper and gathered under the title The Fifth Gospel / El Quinto Evangelio / a Cincea Evanghelie - available- here - in Spanish language.
You can find below some examples of recordings and you can hear the feel the voice of Samael Aun Weor:
Om Mani Padme Yum
Mantras - for Astral
Mantras - for healing
Mantras - for defence
MESSAGE - one of the last recording -
I AM WITH YOU !
Moses - simbology
Matter and spirit
HYMN of the Avatara
About Copyright - Samael Aun Weor renounced -for his books- to copyright