standinga

import AVFoundation
import PlaygroundSupport

PlaygroundPage.current.needsIndefiniteExecution = true

class AudioPlayer {
    var topAudioFiles: [AVAudioFile] = []
    var engine:AVAudioEngine
    var topAudioAudioNodes = [AVAudioPlayerNode]()
    var mixer: AVAudioMixerNode

standinga

import AVFoundation

class AudioPlayer: NSObject {
    
    private let engine = AVAudioEngine()
    private let playerNode = AVAudioPlayerNode()
    private var file: AVAudioFile!
    private var isPlaying = false
    private let audioPlayerQueue = DispatchQueue(label: "AudioPlayerQueue")
    

standinga

import Cocoa

class ViewController: NSViewController {

    private var audioPlayer: AudioPlayer!
    override func viewDidLoad() {
        super.viewDidLoad()
        guard let url = Bundle.main.url(forResource: "z", withExtension: "wav") else {
            fatalError("can't create url from resource")
        }

standinga

//TestsFrameworkSwift.swift
import Foundation

public class TestsFrameworkSwift {
    
    public init () { }
    
    public func fromTestFrameworkSwift()-> String {
        let testFrameworkObjc = TestFrameworkObjc()
        return testFrameworkObjc.fromTestFrameworkObjc()

standinga

//TestFrameworkObjc.h
#import <Foundation/Foundation.h>

NS_ASSUME_NONNULL_BEGIN

@interface TestFrameworkObjc : NSObject
- (NSString *) fromTestFrameworkObjc;
@end

NS_ASSUME_NONNULL_END

standinga

//TestFrameworkObjc.m
#import "TestFrameworkObjc.h"

@implementation TestFrameworkObjc
- (NSString *) fromTestFrameworkObjc{
    return @"fromTestFrameworkObjc with love";
}
@end

standinga

//TestFramework.h
#import <Cocoa/Cocoa.h>

//! Project version number for TestFramework.
FOUNDATION_EXPORT double TestFrameworkVersionNumber;

//! Project version string for TestFramework.
FOUNDATION_EXPORT const unsigned char TestFrameworkVersionString[];

#import <TestFramework/TestFrameworkObjc.h> // TestFrameworkObjc.h needs to be public!

standinga

// ViewController.swift
import Cocoa
import TestFramework

class ViewController: NSViewController {

    override func viewDidLoad() {
        super.viewDidLoad()

        let testFrameworkSwift = TestsFrameworkSwift()

standinga

//AUFramework.h
#import <Cocoa/Cocoa.h>

FOUNDATION_EXPORT double AUFrameworkVersionNumber;

FOUNDATION_EXPORT const unsigned char AUFrameworkVersionString[];

#import <AUFramework/VolumePluginAudioUnit.h>

standinga

<dict>
    <key>NSExtensionAttributes</key>
    <dict>
        <key>AudioComponentBundle</key> // key required to load audio unit in-process
        <string>co.borama.AUFramework</string> // framework bundle identifier
	<key>AudioComponents</key>
	<array>
	    <dict>
	    <key>description</key>
	    <string>VolumePlugin</string>