could not display uploaded data

[james20141606]

Hi, thanks for the great tool! I really love it.
I am trying to label our research data and i found that the audio files from mine could not be displayed after uploading. While the example audio file could always be displayed correctly.
I try to change the duration or sampling rate of my data and the example audio. turns out that the example audio could always work but none of mine could be played or displayed.
Are there any specific requirements for the uplpded audios?

[felixbur]

if that helps, the audio was really only displayed (even for admin) after being assigned to a user (while uploading)