The Actor feat states (PHB, p. 165):
You can mimic the speech of another person or the sounds made by other creatures. You must have heard the person speaking, or heard the creature make the sound, for at least 1 minute. A successful Wisdom (Insight) check contested by your Charisma (Deception) check allows a listener to determine that the effect is faked.
The Voice of the Chain Master eldritch invocation for warlocks states (emphasis mine):
You can communicate telepathically with your familiar and perceive through your familiar’s senses as long as you are on the same plane of existence. Additionally, while perceiving through your familiar’s senses, you can also speak through your familiar in your own voice, even if your familiar is normally incapable of speech.
In a nutshell: Can I make my familiar imitate someone else's voice in a way that might fool them?
Basically, I'm hoping for some fun ways to sow discord, confusion, and otherwise mess (or even parley) with my enemies, all from the safety of a distant enough location on the same plane of existence.
Similar questions have been asked here, but they all centered around the ability to cast spells, or use spell-like abilities (you can't).
My gut says that while technically it's not my characters' voice per se, it is my character's voice imitating someone else's in a mundane (non-magical) way, so it should function properly.
Is there an official rule or ruling on whether this works?