mpSoundEngineで音階発生（Stereo）

外部フレームワーク（mpSoundEngine）を利用してステレオで（左右のチャンネルで別々の）音階の音を鳴らすAppleScriptです。

AppleScript名：mpSoundEngineで音階発生（Stereo）

— Created 2017-12-14 by Takaaki Naganoya
— 2017 Piyomaru Software
use AppleScript version "2.4"
use scripting additions
use framework "Foundation"
use framework "mpSoundKit" –https://github.com/matthiasplappert/MPSoundEngine

property engine : missing value

set engine to current application’s MPStereoSoundEngine’s alloc()’s init()
–https://pages.mtu.edu/~suits/notefreqs.html
set soundList to {261.63, 293.66, 329.63, 349.23, 392.0, 440.0, 493.88, 523.25}
set aLen to length of soundList

repeat with i from 1 to aLen
　　makeStereoSound(item i of soundList, item (aLen – i + 1) of soundList) of me
end repeat

engine’s |stop|()

on makeStereoSound(aHz, bHz)
　　engine’s leftChannel()’s setFrequency:aHz
　　engine’s rightChannel()’s setFrequency:bHz
　　engine’s start()
　　delay 0.5
end makeStereoSound