Active Noise Cancelling (ANC)?

I'm sure many of us have a workshop where we make our speakers / amps etc with some very noisy tools. Among those tools in my workshop the worst offenders for noise are the air compressor and the dust extractor.

Given the very cyclic nature of the noise these tools produce it occurs to me that active noise cancelling might be rather effective, especially placed close to the source.

I wondered if anybody has some tips on maybe existing ANC boards, DSPs or micro controller libraries etc.. that could get me testing this idea quickly and easily?

I could just use an inverting opamp and a fader, but I'm sure there are more advanced self tuning dsp systems with suitably low latency.