Can I upload and use my own audio files? iKnow! Support Updated February 06, 2021 06:32 Follow As long as the audio files are in the mp3 format and less than 2MB, you can upload and use them in your custom courses. Related articles Why is the Start button not visible on my custom course? How many items can you register in a course? Price change for iKnow! Pro membership (October 1, 2019) Any Japanese grammar/JLPT related courses? How come parts of speech of some Japanese words do not match the ones in example sentences or translations? Comments 0 comments Article is closed for comments.