A 处理 in which the 时值 of a 声 is altered 时间 stretching can be used to make 声 longer or shorter

时间缩放 can be done on its own using 数字 技术 or can be linked with 音高移位 as it was with 模拟 技术 for 例如 as in playing a 录制 at the wrong 速度

[In 数字 音乐 时间 stretching and 压缩 involve the elongation or 简化 of a 录音 without changing its 音高 Whilst using 磁带 the 音高 rose or descended according to the amount of 增加 or 下降 速度 ]

Large-scale stretching can lead to 粒子 质地（纹理、织体） large-scale 压缩 can lead to the 源 becoming masked