Anybody got any idea why I wouldn’t be able to add a key to the graph of a low pass filter? When I right click the graph, it gives me the option to Add Key, but clicking it just makes a gray line appear at the bottom of the graph with a gray key that I can’t select, and the low pass graph line remains unchanged.
Any thoughts?
I’d love to help you, but the lowpass filter costs $1500. 
Heh… fair enough. It’s just very strange - I can adjust curves on the items built into the 3D Sound section, but if I try to add filters, I can’t edit the graphs for any of them. Seems buggy, but I’m hoping I’m just doing something wrong.
Also, I tested this on mac and windows and I get the exact same thing on both.
A little more information on what’s going on:
When I try to add a key to the right half of the low pass curve (yeah, only on the right side), it creates what appears to be a partial curve at the bottom left of the graph.
If I try to move the Key on that graph, I get this message:
Edit: To add to the weirdness - It looks like the low pass curve is actually representing the Cuttoff Frequency, when (going from the videos) it looks like it’s supposed to be representing the intensity of the effect. What’s going on here?
Is anybody else having this problem?
To what videos are you referring?
There are only two parameters. Either one could be considered “intensity of the effect”. But cutoffFrequency is generally a much more obvious change, and so if anything were called “intensity”, that’s the one I’d pick.
I figure the reason you’re having a problem is that you’re trying to key values between zero and one, which are totally useless for either parameter of that filter. Regardless, the error message is poor, and I think Unity should prevent you from trying to key anything outside of the usable values of the parameters.
I think that the 0.0 to 1.0 ratio is supposed to be a multiplier for the cutoff frequency - where 0.0 is no cutoff, and 1.0 is your set value.
Here’s the video I’m talking about - right around the 2:35 mark:
Just installed 3.1 and still no luck with this. I’ve tried this on 4 different computers and they all have the same problem.
Is anybody else having this issue? I want to know if I’m doing something wrong…
for me, adding keys works fine, but a similar IndexOutOfRangeException appears in “Play”-mode if I have selected any audiosource with effects on it. Additionally, some random values of the audiosource are set to zero… This problem only appears for me when the audiosource is selected in the inspector, so it seems to be a gui issue.
Actually. I think I found it…
Try double clicking somewhere on the purple line instead or right click → add key.
I can’t understand what right clicking → add key is supposed to do either, I get the same behaviour as you. I think it’s a bug.
Yeah… that’s exactly what I’m describing. Weird. It’s been a bug since beta and they haven’t fixed it yet.
It definitely worked at one point during the beta testing, but not anymore.
I’m still having this issue in 3.3, it it working for anybody else?
Even in the inspector, I can’t change the frequency for any Low pass filter. High pass works fine.