Some samples upload. Some do not and give me an “Error: Audio file is empty” notice. Are there instructions somewhere that aren’t buried in a video? I can’t seem to figure out what the issue is, because the “empty” files work just fine everywhere else.
Care to elaborate a bit more? What’s the duration of the samples? What is the file type you are trying to upload? Usual guideline for samples is using a CD type sample rate (44.1kHz, 16 bit stereo WAV/MP3/OGG files) - that should work fine.