Commits
- 680ecb5: Improve constness of the filters (Chris Robinson)
- 1338b4c: Simplify creating NFC filters (Chris Robinson)
- 5841ffe: Use simplified types for contexts (Chris Robinson)
- c7800c5: Ensure dual biquad filters interpolate correctly (Chris Robinson)
- e206d76: Slightly simplify the NFC filter structure (Chris Robinson)