I'm trying to render a video. But after rendering it doesn't have sound. Does someone know how to fix this? I'm pretty sure I didn't mute anything.
if you're not muting any of the audio channels then it could be a codec problem. I wouldn't know since I don't use crap codecs like WMV. Often when the playback device isn't a computer, it can only handle very specific bitrates and sample rates, and using anything thats not officially supported by the device generally won't work.
the audio codec is dictated by the video codec. When a device encounters a file that uses a specific video codec, it expects the audio to also use a specific, associated codec. If it uses a different one then the results may be unpredictable and it could well not work at all.