Zho:演奏速度改变 ()（积木）

The Change Tempo by  积木 is a 音效类积木 and a 条形积木. The block changes the 专案的 演奏速度 by the specified amount. Changing the tempo affects how long the 演奏节拍  拍 block and the 演奏音阶   拍 block will play, due to the tempo affecting the length of a beat.

用法示例
As this block changes the tempo (which determines how long each beat is), it is mainly used to speed up and slow down the 演奏节拍  拍 block and the 演奏音阶   拍 block.

Some common uses for the Change Tempo by block:
 * Changing the speed of songs made with the 音效类积木
 * A music mixer
 * In a project, using a record player and setting the speed of the music to match the speed of the needle

应用
The block can be replicated with the following code:

演奏速度設為 ((演奏速度) + (amount)) bpm // (amount) is change amount

参见

 * 演奏速度设为 bpm
 * 演奏速度（积木）
 * 演奏速度（值）