As usual, I ignore the simple thing of actually browsing through the forum to see if this has already been suggested - or that it in fact IS a part or Renoise that I have not discovered.
Nonetheless, ignoring all that, I would personally love to be able to copy a waveform (either a whole file, or from your audio editing program) to memory, then enter Renoise and paste it straight in to the Renoise sample editor.
I could guess I am not alone wanting a feature such as that one.
Okay, so here is the deal - I use Cool Edit 2000 (lame, I know, but it suits my needs perfectly) and when I have edited or created an instrument, I sometimes dont feel the need to save it, except USE it. But I still need to save it (duh!) and then look it up in Renoise.
If you do this often, it can be a a VERY tedious task… To create/modify, then save, then browse for the sample at hand, for each sample.
Alot of you most likely dont see the “problem” in this, but that is because it is such a natural way to do buisness.
Here is an alternative version/example
Here you are, in your favourite audio editing (note, audio, not music) program. In there, you create/edit, then save your work at a specific location, then you go in to Renoise, look the file up (among >all< the other wave-forms), only to discover that it is out of tune with the rest of the instruments, then, when you create more, you need to tune it again and again.
It would be easier to “just sneak it in there”, then put another one in as you gauge the audio frequency to find a “zero” to align the rest of your created wave-forms to… That is if you are sloppy about “standards” wink
So, would’nt it be easier to just copy your waveforms to memory, just after you created it or edited it, then paste it directly in to Renoise?
–
Now, for the tricky part… Giving suggestions is easy. Fullfilling them is an entirely different undertaking…
Even from a laymans perspective , I know that such a thing would mean a lot of coding.
First, you would have to get Renoise to “recognize a wave-form” when it is in memory, what type it is, bitrate, khz, header, that sort of thing.
Second, and with different “handles” from each set of programs that people use.
Third, it would have to be edited, and gauged for each platform and their programs and way of handling things in memory.
Fourth, you would have to make a tricky key combintions to bypass Renoise own working enviroment and memory handling.
Go figure…
But! would it not be a VERY handy tool for Retro-Musicians as well as more modern ones? Samples that you dont even need to save after you created and/or edited them. You could just press ALT+A or drag the mouse across it and then paste it in Renoise. Very handy!
Oh. I know that some of my suggestions rather hasty and a bit lame at times- not to mention a lot of reading and repeating for rather small bits of info 
- but I think that such a feature would be very useful indeed!
Hope you like it, in its jumbled mess. 