there is a way a lot easier..
Youtube support only video files (ex..mov, mpeg4, wmv etc..)
All you need is to create the "right" video file according to youtube specifications, in this way you will don't lose quality.
You will need a video editing software to do the job.
Here are the settings (I use Sony Vegas Pro to do this):
Export from "Fruity Loop" a .wav file 44.1 kHz 16 bit.
Import the audio in Sony Vegas or other video editing software.
Create your video with slides, video files, all what you want.
Go to "export video" or "render as" and change settings:
- the file format should be a ".mp4" or "Sony AVC"
- audio settings should be AAC - 48 kHz - 128 or 384 kbps
- video framerate 25 fps or better 30 fps
- video resolution 640 x 480 (if you want you can set in HD)
thats it ! Your video software will make the audio conversion from original .wav to the AAC according to Youtube settings..
So the resulting file will be a .mp4 ready to upload on youtube, but the audio inside is decoded in AAC format..No audible quality loss !