Blending Two Audio Samples about nvdsp HOT 1 CLOSED

Just use the overall gain with 0.8 and 0.2 for 80% and 20% respectively. Then play them both at the same time. The audio buffer is just an array of floats, so you could also loop or find a vDSP (in the apple docs) to add the floats. So if cat = [a1, a2, a3] and dog = [b1, b2, b3] then result = [a1+b1, a2+b2, a3+a3]. But if you play the samples at the same time (which is like sending them to the master track) the underlying audio engine will do this for you.

from nvdsp.