Fifth generation home console systems also developed specialised streaming formats and containers for compressed audio playback. Games would take full advantage of this ability, sometimes with highly praised results (""). Games ported from arcade machines, which continued to use FM synthesis, often saw superior pre-recorded music streams on their home console counterparts ("Street Fighter Alpha 2"). Even though the game systems were capable of "CD quality" sound, these compressed audio tracks were not true "CD quality." Many of them had lower sampling rates, but not so significant that most consumers would notice. Using a compressed stream allowed game designers to play back streamed music and still be able to access other data on the disc without interruption of the music, at the cost of CPU power used to render the audio stream. Manipulating the stream any further would require a far more significant level of CPU power available in the 5th generation.