Klax is a port of an arcade puzzle game to the Nintendo Entertainment System. The Japanese release was licensed by Nintendo while the American release wasn't. Klax was released in North America by Tengen as one of the many unlicensed NES titles.

Tengen's NES port of Klax has a unique soundtrack driven by heavy sample use. However, it was discovered in 2020 that the samples suffered from a common encoding issue known as bit-reversal. This hack corrects these samples to what the composers likely intended. Various sample parameters have also been tweaked to improve the audio experience.

Details:
- All samples have been fixed
- Unnecessary IRQ & loop flags have been cleared
- Sample offset parameter has been tweaked for the snare samples to minimise delay
- Sample length parameter has been tweaked (E.g. no more buzz at the end of the kick sample)
- Initial delta value for samples has been tweaked (E.g. less distortion/clicks on voice samples)

Database match: Klax (USA) (Unl)
Database: No-Intro: Nintendo Entertainment System (v. 20210216-231042)
File SHA-1: 80A2EA6E52B96506613912FF9A15657A29C9684A
File CRC32: 755CF043
ROM SHA-1: 579FBA48D99F9181EA39C42ACCFD430125F2614E
ROM CRC32: 93F3A490