Welcome Adroit,
My husband was on a trach and vent for 8 years. For approx 6 of those, he was able to speak with the trach. He did not have a speaking valve. The way we worked it, as directed by his physician, is the cuff on the trach was deflated and he was able to talk around it. The cuff, in case you medical team has not advised you, is a ballon around the bottom that is inside his trachea. With the air left of out the balloon, the air can get around the trach and up past the vocal cords. We never opted for a speaking valve, because eventually he would not be able to use his arms and that would be needed for the valve.
I hope I have explained this in a way you can understand.
Hugs and best of luck,