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我正在播放一个带有默认正弦波的短音符音序列作为Swift Playground中的声音。稍后,我想用Soundfont替换声音,但目前我只是在制作一些声音而感到高兴。在雨燕游乐场播放音符
我希望这是一个MIDI的序列,可以直接控制音符,而不是纯粹基于音频的。 AudioToolbox
似乎提供我正在寻找,但我有麻烦充分了解其用法。这是我目前正在尝试
import AudioToolbox
// Creating the sequence
var sequence:MusicSequence = nil
var musicSequence = NewMusicSequence(&sequence)
// Creating a track
var track:MusicTrack = nil
var musicTrack = MusicSequenceNewTrack(sequence, &track)
// Adding notes
var time = MusicTimeStamp(1.0)
for index:UInt8 in 60...72 {
var note = MIDINoteMessage(channel: 0,
note: index,
velocity: 64,
releaseVelocity: 0,
duration: 1.0)
musicTrack = MusicTrackNewMIDINoteEvent(track, time, ¬e)
time += 1
}
// Creating a player
var musicPlayer:MusicPlayer = nil
var player = NewMusicPlayer(&musicPlayer)
player = MusicPlayerSetSequence(musicPlayer, sequence)
player = MusicPlayerStart(musicPlayer)
正如你可以想象,没有声音播放。我很欣赏关于如何让这种声音顺序播放的任何想法。