[akx]

It was actually intuitive to me.

But I'm used to interfaces for VSTs (audio generation/effects plugins) that usually have this exact interaction mode. See http://www.protoolerblog.com/wp-content/uploads/screenshot_O... for an example of one.

(Sometimes VST knobs also have the extra of horizontal movement being a "fine-tune" mode, even, which is very handy.)

[oakwhiz]

I always found it strange that VST knobs were actually sliders in disguise. After a while you get used to it, but I can see how confusing it might be to users.