Add LFO-style routing system to envelopes

[SilverWolf32]

We can route LFOs to all sorts of different things. It would be nice if we could do the same for envelopes, for example to make a gradual tremolo effect.

_{(Also, I accidentally created the issue before I finished the title. Is there some way to remove the title change from the history?)}

[analogcode]

Yes. Is that something you want to take the lead on? If so, I'd recommend creating a separate branch. Thanks!

[SilverWolf32]

I might be able to do that. What language is the app written in? I have experience with ObjC and Swift, but not C++.

[analogcode]

C++ is the sound engine. Interface/UI in Swift

[SilverWolf32]

Cool! I'll take a look, then. I should branch off develop, right?

[analogcode]

Yes, thanks for asking. We're using Develop to push to App Store. So, a separate branch off of Develop would be preferable. 👍

[SilverWolf32]

Hm, I'm having trouble getting it to build. I installed the dependencies and replaced the bundle identifier, and I'm still getting some errors.

• No such module 'ChimpKit'
• the [CP] Embed Pods Frameworks PhaseScriptExecution command is failing
• Embedded binary is not signed with the same certificate as the parent app (seems to be the OneSignalNotificationServiceExtension, may resolve after fixing the next one)
• on the OneSignalNotificationServiceExtension, the linker is failing because of framework not found Pods_OneSignalNotificationServiceExtension.

I looked in Pods/ and ChimpKit is there, it just looks like Xcode isn't seeing it.

Also, under the Inter-App Audio capability it says "your account does not have sufficient permissions to modify containers". What does that mean, and do I have to be an administrator?

[SilverWolf32]

I didn't know I was supposed to use AudioKitSynthOne .xcworkspace instead of .xcodeproj. Perhaps we should put something about that in the readme. Also, it turns out I had a problem with my build products path. I fixed both issues and it's building just fine now.

[SilverWolf32]

I went to make space in the ENV panel for the routing settings and discovered that the background is an image.

I found https://github.com/AudioKit/AudioKitGraphics, which looks like it might contain what I need, but I can't open any of the files there since I don't have PaintCode. Does anyone happen to have a .psd, .afphoto, .svg, or similar file of the ENV panel background I could use? Thanks.

[analogcode]

The Swift part and interface is rather trivial. And, is something I can make right away if you get the hard part working: writing the c/c++ code and modifing the kernel to allow envelope modulation per voice (which may need to be adapted custom for every parameter/destination). I’d recommend you just make some simple UI controls as a PoC to test the real work - writing the C++. If you get that working, circle back. 👍

[SilverWolf32]

Per voice...you mean independently for every oscillator + the FM system? I have absolutely no experience in signal processing. (: At the moment what I really want is to modify the LFO with an envelope, would that be any easier?

[analogcode]

Only you can answer that question. I don’t know your skill level. Look at the code and decide.

[SilverWolf32]

I tried to add some parameters to the synth system in S1DSPKernel.hpp and S1Parameter.h (increasing S1ParameterCount accordingly), but it's now crashing on me. Any idea why that could be?