ตัวแปลงไฟล์ออนไลน์ฟรี RA เป็น HTK

RA is an audio format developed by RealNetworks to use in its RealPlayer for streaming audio which means that it can be played while downloading. It uses several audio codecs, they range from the ones for delivering high-fidelity sound to those for recording low bitrate audio data. Although, the format was pretty popular and was used by many radio station to stream online, now it is technically inferior to other newer formats.

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