我想使用AudioKit框架生成一些高音和低音的小音序。
所以我首先要看的是这样的信息:" 1100011010
"
- >每个列应循环播放,如果它的值为"1"
,则AudioKit应播放(短)high frequency
声音,如果不是,则应播放(短)lower frequency
声音。
因为简单的定时器循环触发每0.15秒 .play()
- 运行 0.1s声音(高/低)的功能不会#39 ; t似乎非常准确我决定使用 *AudioKit Sequencer*
:
(o)audiokit:
enum Sequence: Int {
case snareDrum
}
var snareDrum = AKSynthSnare()
var sequencer = AKSequencer()
var pumper: AKCompressor?
var mixer = AKMixer()
public init() {
snareDrum >>> mixer
pumper = AKCompressor(mixer)
AudioKit.output = pumper
AudioKit.start()
}
func setupTracks() {
_ = sequencer.newTrack()
sequencer.tracks[Sequence.snareDrum.rawValue].setMIDIOutput(snareDrum.midiIn)
generateMessageSequence()
sequencer.enableLooping()
sequencer.setTempo(2000)
sequencer.play()
}
(o)玩: var message =" 1100011010" var counter = 0
for i in message {
counter+=0.15
if (i=="1") {
// play high sound at specific position
}
else {
// play low sound at specific position
}
}
(o)在特定位置播放低音:
sequencer.tracks[Sequence.snareDrum.rawValue].add(noteNumber: 20,
velocity: 10,
position: AKDuration(beats: counter),
duration: AKDuration(beats: 1))
我的问题:如何使用(position: AKDuration(beats: counter)) //the code from above
在特定位置播放本地声音文件,而不是使用默认乐器AKSynthSnare()
?
答案 0 :(得分:4)
您可以创建两个轨道,每个轨道都有一个AKMIDISampler。一个人玩“低”'样本,另一个扮演一个高的'样品。将高音符分配给高音轨,将低音符分配到低音轨。
let sequencer = AKSequencer()
let lowTrack = sequencer.newTrack()
let lowSampler = AKMIDISampler()
try! lowSampler.loadWav("myLowSoundFile")
lowTrack?.setMIDIOutput(lowSampler.midiIn)
let highTrack = sequencer.newTrack()
let highSampler = AKMIDISampler()
try! highSampler.loadWav("myHighSoundFile")
highTrack?.setMIDIOutput(highSampler.midiIn)
sequencer.setLength(AKDuration(beats: 4.0))
sequencer.enableLooping()
然后将高音和低音分配给每个音轨
let message = "1100011010"
let dur = 4.0 / Double(message.count)
var position: Double = 0
for i in message {
position += dur
if (i == "1") {
highTrack?.add(noteNumber: 60, velocity: 100, position: AKDuration(beats: position), duration: AKDuration(beats: dur * (2/3)))
} else {
lowTrack?.add(noteNumber: 60, velocity: 100, position: AKDuration(beats: position), duration: AKDuration(beats: dur * (2/34)))
}
}
(我没有运行代码,但这样的事情应该有效)