Here you will find a set of ABX tests allowing you to compare lossless and lossy compression in a variety of formats and bitrates. This site is still in its infancy, and the number of tests available will probably grow over time.

Currently we offer the following tests:

The statistically valid Tidal test remake

The Spotify HQ test

(oggenc -q 9)

The Spotify standard test

(oggenc -q 5)

The iTunes test

(iTunes AAC 256kbps encoding)

The Lame MP3 tests (available in 96-320kbps)

(varies)

The FAAC 320kbps test

(faac -b 320)

The OPUS 160kbps test

(opusenc --bitrate 160)

The text on each is mostly identical because they are a rapid expansion from the original Tidal-test-remake page created 25th Nov 2014. That will change with time.