Song sound is excellent because Cricket uses cutting edge compression technology to create the perfect balance between file size and audio quality. This allows consumers to fit a large amount of music on their phone (up to 3,000 tracks), download new songs significantly faster than any other service (as fast as 10 seconds) and have it all in glorious High-Quality Stereo. Licensed from Orban, a leader in world-class professional broadcast technology, the Muve Music library is encoded in HE-AAC v2.

Source:
How good is the fidelity of the music? | Cricket Wireless