SoX - Mix original signal with effected signal

Is there an option in SoX effects processing to mix the wet and dry signals instead of only outputting the wet? For example, say my effects chain is overdrive into pitch shift: sox in.wav out.wav overdrive 0.5 gain -0.5 pitch 700 Except I don't want the final file to be _just_ the shifted signal. I want a mix of the distorted, shifted signal and the distorted, unshifted signal. Does SoX support this somehow?