13. The system of claim 11 , wherein convolutional filter or the frequency domain filter are jointly trained using the neural network.
11. The system of claim 9 , wherein the operations further comprise: generating a convolutional filter with one or more real filter weights; and generating a frequency domain filter with one or more complex filter weights based on the convolutional filter, wherein processing the frequency domain data using complex linear projection comprises applying the frequency domain filter to the audio data.