Let me tell you my little story about MorphVox.
It all started on release day, I saw it and thought "Neat, I want that." I wishlist it and go about my day on TF2. I come across someone selling it for 4 keys because they decided against it after buying it. I thought it was a steal, so I got it. I hopped off so I could download it. A short time later, I boot it up, configure it, and play with it. I had so much fun with it. Even programmed in a Dalek voice. The voice and effects packs came out, I got them to continue the fun. So much so, I just kept it as my default mic so I wouldn't have to fiddle with configurations when I wanted to change my voice. But that's when everything changed.
Soon, they released some other DLC that was far too expensive for what it was. I thought that since it didn't add any new features that I would use, I wouldn't get it. Around that time, I started using Mumble. I kept getting "Your mic is cutting off at the end." Since it never did that before, I chalked it up to Mumble. I'd restart Mumble, and it'd be fine. Thought nothing of it. One day, while playing TF2 I hear the dreadded "Your mic is cutting out." Now, I was angry. This never use to happen. What had changed? I can tell you what. I had made MorphVox my default mic. It was creating a delay. So when I'd let go of my PTT button, my full sentence wouldn't get through. So I come to Steam to see if anyone else has this issue and if they figured out how to fix it. Click the forums button... No forums. Click the group button... no group. I go to their site. I had to dig for a good 10 minutes before I got an email address. I send an email. Once I got an email back, they suggested I check a few things in the settings. I set them like they suggest. At first, it seems all good. I get in a few days of TF2 before I'm told I'm cutting out again.
I rage quit right there. Tried another mic, still cutting. Different VOIP software. Cutting. They obviously had given up much hope for this program before they thought they could milk a few more dollars out with Steam. This program is an abandoned piece of garbage that doesn't work like it was promised. DO NOT BUY THIS! It will only make you want to pull your hair out.