ตัวแปลงไฟล์ออนไลน์ฟรี HTK เป็น AAC

Single channel 16-bit PCM format used by HTK, a toolkit for building Hidden Markov Model speech processing tools

This format was originally created as an alternative to mp3. The idea was to achieve a small file size with better sound quality. The first versions weren’t quite successful, but with the development of AAC, it became possible to store sound with less loss of quality, and with the same file sizes as that of mp3.