Convert aac to txw

What is the difference between .aac and .txw?

Developer: Bell Labs, Fraunhofer Institute, Dolby Labs, Sony and Nokia; Yamaha

Description: Compressed audio file similar to an .MP3 file, but offers several performance improvements; examples include a higher coding efficiency for both stationary and transient signals, a simpler filterbank, and better handling of frequencies above 16 kHz; maintains quality nearly indistinguishable from the original audio source.; The TXW file format is associated with the Yamaha TX16W, a digital sampling keyboard produced in the late 1980s. These TXW files contain audio data that is specifically formatted for use with the TX16W sampler. Essentially, a TXW file stores a sample or a collection of samples, including their associated parameters such as loop points, velocity layers, and other settings that are necessary for the sampler to correctly playback the sounds. The format is proprietary to Yamaha.