A 处理 in which the 时值 of a 声音 is altered 时间 stretching can be used to make 声音 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