PSP have updated the PSP MixPack to v1.8.3, including Audio Units versions for OS X and RTAS for OS X and Windows. The update is free for current owners of the PSP MixPack v1.7, and any one who bought any version of the MixPack after 1st January 2004.

Upgrades for users of older versions of the MixPack is $29 USD.

Changes:

Audio processing:

• PSP MixBass, PSP MixPressor and PSP MixTreble produce 1023 samples of internal latency at all sample rates. This latency is compensated in most of modern audio applications.

GUI:

• Integrated factory and A/B preset bar.

Compatibility:

• VST, DX and new RTAS (for Mac OSX and PC) and AudioUnit (for Mac OSX) versions included.
• Several VST compatibility and other bugs removed.

Known problems:

• Presets written with previous versions of the MixPack plug-ins will not properly load in v1.7 and v1.8 because a stereo-mono switch was removed from parameter list and preset system was changed.
• Some audio applications including Protools LE doesn't compensate internal plug-ins' latency.