jersmi Yup, and by having 16 sequential sine waves you should have 16 upwards pointing peaks, and 16 pointing downwards. From your image it seems like you have 32 peaks pointing upwards with something in between. As this is also repeating, it will be beneficial to "zoom" in on just one half-cycle of the main sine which would be 1/32 of the full image. By the looks of the wave it seems like the frequency of the part I'd expect to be at the negative range is quite a bit higher. Can you also try with a sine wave from the link I posted with the parameters I provided? Then you can check if the composition works as intended with the expected source material to see if it is the input that differs or if it is the composition that does something funky.
I'm afraid the questions have to be answered by VDMX, and I don't think they hang much around in the Vuo forums. I would try contacting them at firstname.lastname@example.org instead to get a response through their official support line. Facebook groups and forums can often be hard to get a response through since it's mostly community driven, and the companies won't have the time to follow every thread there scanning for- and replying to issues. I suspect you will have better luck via email :)
Jean Marie Yup, I don't think my thoughts around how such a node should/could work is complete or backed by enough knowledge about how to deal with it yet either. I've read a bit more on the RIFF format/spec, and it gets even worse. The WAVE spec does not specify a distinct order of the chunks, meaning that you can stumble across something that place the DATA chunk before the FORMAT/FMT chunk. Not good practice, but not disallowed either.
jersmi can you cut the length of your data down to one cycle to see what's happening and post the pic of that? You have 32 sine-like peaks in there with something in between (might be because of the scaling). Dividing your data byte count by 32 should place you somewhere around one cycle depending on the stuff at the end.
I will have to double check (not at a mac atm), but I'm pretty sure I deleted the input string and dragged the file in again to check for file placement issues after closing the file and re-opening from the modules folder. It might be that the parent folder location isn't updated though (linking to desktop instead of /user modules), but I can't quite understand how that would function conceptually.