As much as it is believed that 64kbps is "more than enough" for quality audio calls, 128 would change the face of V-Mix Call. Audio-Only producers would be able to migrate from high quality applications to V-Mix Call and have an incredible amount of added flexibility. 64 unfortunately creates an abundance of audio artifacts into the stream, and it makes it sound no better than Zoom an many cases. Please amp up the quality for V-Mix Call!!