Matching two audio inputs (signals) [duplicate]

1. How do you compare similarity of two signals?
2. How do you mix two audio signals?
3. How do you know if two signals are correlated?

How do you compare similarity of two signals?

For measuring the similarity between two temporal signals, you can try using Dynamic Time Warping (DTW). DTW constructs a distance matrix between the two signals and tries to find minimum distance the two signals. If the two signals are identical, then distance is zero.

How do you mix two audio signals?

Step 2: Mixing the Signals

The easiest way to do this is to combine them together using resistors. If you connect each respective left channels to a 1K resistor, and the other end of each resistor together, then you have effectively mixed the left channels together. The right channels can be mixed in identical fashion.

How do you know if two signals are correlated?

In words, we compute a correlation by multiplying two signals together and then summing the product. The result is a single number that indicates the similarity between the signals x[n] and y[n]. What values can C(x, y) take on, and what does this tell us about the signals x[n] and y[n]?