The 现场演出 处理 and 表演 of visuals as part of 音乐 events has been enabled to expand considerably in recent years through 发展 in 数字 技术 Although the name derives from 视频 it is largely through 软件 that 现场演出 表演 and 即兴作品(即兴创作) which mix 操控 or 合成 视觉 材料 has come about There may or may 不 be 科技 or 艺术 mappings between the 视觉 and 音乐 性能