> What is preserved when it is "LOSSLESS" Just like any general purpose compression: everything - flac could be used just like zip/zlib/gzip as a general purpo

> What is preserved when it is "LOSSLESS" Just like any general purpose compression: everything - flac could be used just like zip/zlib/gzip as a general purpose compressor it just wouldn’t compress as well on most data that isn’t audio. > dropped when "LOSS" occurs? Lossy compression generally employs some type of perceptual coding where data is reorganized such that the signal data is sorted or localized according to its perceptual importance. This does partly involve removing or reducing the density of signal in the higher frequencies but it also exploits things such as masking both in time - inability to perceive signals occurring close in time of similar frequency. And frequency masking - our inability to hear quieter signals that are close in frequency to a louder one.