英文:
Is it possible to create 5 oscillators (an array?) working simultaneously and control their frequency and amplitude independently of each other?
问题
import SwiftUI
import AudioKit
class ToneGenerator {
let engine = AudioEngine()
let osc = PlaygroundOscillator()
init(){
engine.output = osc
try! engine.start()
}
}
struct ContentView: View {
let toneGenerator = ToneGenerator()
var freq01: Float = 200
var volume01: Float = 0.5
@State var isPressed = false
var body: some View {
Text("BEEP")
.font(.title)
.simultaneousGesture(
DragGesture(minimumDistance: 0)
.onChanged({ _ in
isPressed = true
toneGenerator.osc.frequency = freq01
toneGenerator.osc.amplitude = volume01
toneGenerator.osc.start()
})
.onEnded({ _ in
isPressed = false
toneGenerator.osc.stop()
})
)
}
}
I tried to create several generators, but did not understand how to do it.
All the materials I found on the Internet are related to the Playground and do not work in Xcode.
英文:
import SwiftUI
import AudioKit
class ToneGenerator {
let engine = AudioEngine()
let osc = PlaygroundOscillator()
init(){
engine.output = osc
try! engine.start()
}
}
struct ContentView: View {
let toneGenerator = ToneGenerator()
var freq01: Float = 200
var volume01: Float = 0.5
@State var isPressed = false
var body: some View {
Text("BEEP")
.font((.title))
.simultaneousGesture(
DragGesture(minimumDistance: 0)
.onChanged({ _ in
isPressed = true
toneGenerator.osc.frequency = freq01
toneGenerator.osc.amplitude = volume01
toneGenerator.osc.start()
})
.onEnded({ _ in
isPressed = false
toneGenerator.osc.stop()
})
)
}
}
I tried to create several generators, but did not understand how to do it.
All the materials I found on the Internet are related to the Playground and do not work in Xcode.
答案1
得分: 0
我不太确定您想要实现什么,但可以尝试像这样做。关键是使用$toneGenerators[index]
来创建对音调生成器的绑定,以便您可以更改音量和频率。
class ToneGenerator: Identifiable {
let id = UUID()
let engine = AudioEngine()
var osc = PlaygroundOscillator()
init(){
engine.output = osc
try! engine.start()
}
}
struct ContentView: View {
@State var toneGenerators: [ToneGenerator] = []
let freqs = [Float(100), 200, 300, 400, 500]
var body: some View {
VStack {
HStack {
Button("BEEP") {
let toneGenerator = ToneGenerator()
toneGenerator.osc.frequency = Float.random(in: 100...1000)
toneGenerator.osc.amplitude = 0.5
toneGenerator.osc.start()
toneGenerators.append(toneGenerator)
}
.font((.title))
Button("STOP") {
toneGenerators.forEach { toneGenerator in
toneGenerator.osc.stop()
}
toneGenerators = []
}
.tint(.red)
.font((.title))
}
Text(toneGenerators.count, format: .number) + Text(" generators")
Grid {
GridRow {
Text("Freq").bold()
Text("Volume").bold()
}
ForEach(toneGenerators) { toneGenerator in
let index = toneGenerators.firstIndex(where: { $0.id == toneGenerator.id })!
GridRow {
Slider(value: $toneGenerators[index].osc.frequency, in: 100...1000)
Slider(value: $toneGenerators[index].osc.amplitude, in: 0...1)
}
}
}
.padding()
Spacer()
}
}
}
英文:
I'm not 100% sure what you're trying to achieve, but how about something like this. The key is to use $toneGenerators[index]
to create a binding to the tone generator so you can change the volume and frequency.
class ToneGenerator: Identifiable {
let id = UUID()
let engine = AudioEngine()
var osc = PlaygroundOscillator()
init(){
engine.output = osc
try! engine.start()
}
}
struct ContentView: View {
@State var toneGenerators: [ToneGenerator] = []
let freqs = [Float(100), 200, 300, 400, 500]
var body: some View {
VStack {
HStack {
Button("BEEP") {
let toneGenerator = ToneGenerator()
toneGenerator.osc.frequency = Float.random(in: 100...1000)
toneGenerator.osc.amplitude = 0.5
toneGenerator.osc.start()
toneGenerators.append(toneGenerator)
}
.font((.title))
Button("STOP") {
toneGenerators.forEach { toneGenerator in
toneGenerator.osc.stop()
}
toneGenerators = []
}
.tint(.red)
.font((.title))
}
Text(toneGenerators.count, format: .number) + Text(" generators")
Grid {
GridRow {
Text("Freq").bold()
Text("Volume").bold()
}
ForEach(toneGenerators) { toneGenerator in
let index = toneGenerators.firstIndex(where: { $0.id == toneGenerator.id })!
GridRow {
Slider(value: $toneGenerators[index].osc.frequency, in: 100...1000)
Slider(value: $toneGenerators[index].osc.amplitude, in: 0...1)
}
}
}
.padding()
Spacer()
}
}
}
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