This question was raised in the ‘Want to maximise your product design? See how a custom ASIC can help?' webinar, view all the questions in the round-up blog post.
Yes, Cortex-M CPUs are used extensively in signal processing applications. The CPU required will depend on the application. Some Cortex-M CPUs (Cortex-M4, Cortex-M7 and Cortex-M33) also offer DSP and floating point capabilities, and it is this combination of control processing and DSP processing within the same CPU that make them an ideal choice.