AudioKit | Swift audio synthesis , processing , & analysis platform | Audio Utils library

I am working in an AUv3 in Audiokit. The Auv3 has a timer that perform actions. The timer is activated on viewDidLoad. I have try with Timer, usleep, DispatchQueue.asyncAfter and DispatchSourceTimer. All them works fine. The problem is when running some instances of the AUv3 the timer duplicate the fire time by the number of AUv3 instances or don't work correctly. There are no problem with cpu charge. Is there any way to run a timer in some instances of Auv3 at the same time without conflicts between them?. Some of my timers:

I am creating an array of SpriteNodes which each have an instance of another binded variable which is actually an instance of synthesiser code built with AudioKit as so...

Cloned repository of Audiokit and builded with last nobeta version of XCode 13.1 and get this error:

I'm just about have my first App ready to send to be validated by AppStore. My build is currently using the develop branch of AudioKit. Should I be submitting using the main branch? I'm running Xcode 13 and the main branch just causes loads of errors.Should probably have stuck in Xcode 12!

I guess the answer must be the latest main branch but I'm a bit unsure

Also I'm wonder if and how to credit AudioKit?

Or indeed generally how does one credit 3rd party frameworks? if at all?

I have an "About" view in the App itself and was just going to put "Built using AudioKit" there and on the App Store details. Can't find any other decent example on the App Store to go by.

I'd like to be able to get amplitude and spectrum data from my AudioPlayer, but since each Node can only have one tap, I'm unsure how to make this work in AudioKit 5

I've been trying to determine if it is possible to integrate CoreML models for the purpose of creating custom AudioKit Effect Nodes. I'm curious if anyone has tried this previously and if they might have some resources to ensure I'm approaching this problem correctly.

Presently, I've created a custom AudioKit node that loads my model(s) and buffers frames until enough frames are available to perform a prediction. Once the input has enough data, its loaded into a MLMultiarray and passed to the model to perform a prediction... but the prediction call I believe is blocking the audio thread, so this is definitely not the correct way to do this... I think.

I'm not sure if utilizing GCD is appropriate but I'm trying presently testing this...

Hoping someone might have some insights or resources that might assist how this might be achieved, certainly could be awesome utilize the neural engine for DSP :) Everything I've seen so far is just about classification, not DSP.

I'm new here and new with music apps (and programming in general).

I'm trying to build a synth app using AudioKit 5 for my final project. I made an oscillator and tried to add Amplitude Envelope but no sound coming out. (If I put the oscillator in the output - there is a sound.)

I saw this question in the internet several times in different types but without any solution.

Does anyone know what is the problem? And if not - do you have other solution for envelope?

The code:

I have been using FFmpeg Android for a music app I'm working on. I built a custom audio engine from stratch with C++ and FFmpeg and it works amazing and it fulfilled all my needs. However, Due to FFmpeg being Lgpl lisence, it seems to me after some researching it is not possible to use a lgpl lisence due to app stores policy. Im not a lawyer or have the money to hire a lawyer for a commercial advise. So I am thinking to replace ffmpeg with another audio decoder, processor library. I am planning to feed the custom decoded data to audio devices through Apples core audio library.

Here are my needs:

• Need to decode ogg files
• Need to encode pcm data as aac file
• Need to add post process FX to decoded data such as low pass filter etc

So what I am asking for is an answer to one of the following:

• Could FFmpeg really not be used in app store due to lgpl static linking issues? (I looked at the most famous apps that use FFmpeg on Android, all of them does not use FFmpeg on IOS)
• If I were to use another library for FFmpeg what is the best alternative to work with? Did anyone actually had experienced the same situation that I am in?

I also tried using AudioKit but it has a critical problem that does not meet with my requirement so I dropped it.

I am looking for advice here. Thanks!

I am trying to figure out if it is possible to add effects to a new track in the sequencer just like you would with a instrument.

So far I haven’t been able to figure it out based on the docs, but the idea is to be able to sequence parameters for a selected effect just like you would with midi note information such as velocity, length and pitch/note for AudioKit instruments. Say if you wanted to sequence a low pass filter; you would have access to sequence the cutoff frequency and resonance etc.

Any ideas if this is achievable with AudioKit?

Thanks in advance.