High-resolution audio processing objects. Since all audio is processed at 32-bit in MaxMSP, the hi-res objects use two patchcords to allow for 64-bit signal processing. These objects are obsolete for Max 6 and higher, which uses 64bit precision in all MSP objects. However the Max 5 versions should work in Max 6 if you need them for compatibility purposes.
Latest versions at the links on the right, but old versions can be downloaded below: