Merge pull request #161 from sp-nitech/zerodf [skip ci]

Improve computational efficiency of FIR

fix doc [skip ci]

revert [skip ci]

bump version [skip ci]

update readme [skip ci]

fix link [skip ci]

Merge pull request #125 from sp-nitech/mdct

Add learnable option to MDCT

Merge pull request #124 from sp-nitech/release

Prepare release

fix

fix doc [skip ci]