FLAC is short for Free Lossless Audio Compression. Since FLAC was already mentioned, I'll just recommend you attempt Monkey's Audio It is lossless, normally compresses better than FLAC, the source is accessible (undecided what license alth…

Read and write FLAC recordsdata from any application with TwistedFLAC. A number of cool new features and improvements are included and embedded in iPhone Xs, iPhone Xs Max, iPhone Xr, iPhone X, iPhone 8, iPhone 8 Plus, iPad Pro and 4K Appl…