MP3 を VTT (ウェブビデオテキストトラック *.vtt) に変換

The MP3 Audio File description is in English:
MP3 files are one of the most common audio file formats. Almost every player on any platform can open an mp3 file. The MP3 file format is a compressed file format with an intentional loss of audio quality. However, the loss should be negligible for the typical user. It was developed by the Moving Picture Experts Group (MPEG) and uses ‘Layer 3’ audio compression. The audio compression preserves the audio within a normal human’s hearing range, while discarding unnecessary information outside of that range. MP3 files are usually used to store music and audiobooks with ‘near-CD quality sound’ (aka Stereo at 16-bit), but due to the great compression algorithm, the file size is around 1/10th of the WAV or AIF file equivalent. The quality of an MP3 file depends largely on the compression bit rate. Common bit rates are 128, 160, 192, and 256 kbps. And higher bit rates result in higher quality files that also require more disk space. MP3 files are easily handled and transcribed by Sonix, please try to upload higher bitrate quality audio files which will improve your transcript’s accuracy.

はい、Sonixは自動的に audio ファイルをaで転記します。 MP3 ファイル拡張子。 Sonixは、 audio からテキストへのオンラインコンバーターです。 ソフトウェアをインストールしなくても、あらゆるオーディオ ( mp3, m4a, wav,...) またはビデオ ( mp4, mov, avi,...) ファイルをテキストに変換できます！ Sonixは迅速かつ正確に文字起こしします*。 MP3 ファイルを作成し、 vtt 形式のテキストに変換します。

MP3 を vtt に変換する最善の方法である Sonix について教えていただければ幸いです。