User:Bille I like them too. I listened to them cold, ie without reading the design yet, to get a clean first impression.
The first time I thought they sounded a bit Bontempi but that was through the X60's tiny speaker. With desktop speakers they sound good, plenty of breadth to the sounds.
2 observations, forgive me if these are known about:
Could I suggest the maker does an additional 'in' and 'out' sound, slightly lower than the first one, that quality IM clients (Kopete ;)) can play alternately with the first one.
That way you would get a 'conversation' effect, read this from left to right with each char representing one message/SFX:
In: ^_ ^_^_^ ^_^_ ^_
Out: *.*. * *.*.*. and so on.
Bille, thanks for the input :) I was not aware of the distortion in those notes. I created the sounds using headphones and played them a good deal through speakers as well, a few people got a sneak preview of them and no one complained about it, however a dropping a few db's on the sounds overall shouldn't hurt (there might be a discrepancy in volume when you are, say, watching a movie and a system sound is played, but...alas, it's all about compromise).
I really like your idea regarding the IM messages, I will surely implement that.
I'm working on version 2.0 of the sounds, they are going to be totally different but that doesn't invalidate this discussion in anyway. Lessons learned :)