April 2014
Beginner to intermediate
830 pages
15h 21m
Chinese
Content preview from Mathematica 錦囊妙計
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374
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第九章
9.4 控制音量
問題點
你想在旋律中藉由控制音量來編輯樂節。
解決方案
與音長設定方法不同，音量並非由引數指定，而是以選項的方式設定。我們沿用之前的
範例，再加上隨機設定音量，使用吉他音色製作放克（funk）節奏。請盡情欣賞吧！
9.5 製作和弦
問題點
你想由單音符拓展到多音和弦領域。378
解決方案
只 要使 用
SoundNote
物 件搭 配 音 符 串 列， 即 可 製 作 和 弦。 例 如 C 大 調 三 和弦， 使 用
{O,4,7}
串 列 代 表 C、E 及 G 三 音。 小 心 不 要 混 淆 和 弦 與 旋 律 的 表 達 方 式， 和 弦 於
SoundNote
內部使用音符串列，而旋律於
Sound
內使用
SoundNotes
物件串列。
ch09.indd 374 2014/4/2 下午 12:51:56
9.6 製作和弦進行
|
375
9.6 製作和弦進行
問題點
你想製作和弦進行。
解決方案
與製作旋律相同的方式，於
Sound
內使用
SoundNote
和弦物件串列即可。以下使用
Map
方式製作和弦進行。
ch09.indd 375 2014/4/2 下午 12:51:56
376
|
第九章
以下是一個流行音樂的和弦進行。379
9.7 以傳統和弦記號作曲
問題點
你想使用傳統的記號方式指
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I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.