In Electronic Dance Music (EDM), many artists use DJing techniques in order to perform their own productions live. As a consequence, they do not have access during the performance to the internal structure of their tracks, and specifically to their equivalent of a partition: MIDI files. On the other hand, if an artist attempts to remix or interpret their own production live, the number of tracks that they can simultaneously control is limited without suitable software. This article introduces LiveScaler, a software that allows live control of the harmony and pitch of electronic music. A set of pitch transformations, termed affine transformations, is presented. These transformations are applied to all MIDI streams of a prepared track. A MaxMSP implementation, in conjunction with Ableton Live, is proposed. Special attention is given to control issues, mapping, and practical live experimentation in the context of EDM.

翻译：在电子舞曲（EDM）中，许多艺术家使用DJ技术来现场表演自己的作品。因此，他们在演出过程中无法访问曲目的内部结构，尤其是其对应的“分谱”——MIDI文件。另一方面，如果艺术家尝试现场重混或演绎自己的作品，若无合适的软件，他们可同时控制的音轨数量将受到限制。本文介绍LiveScaler——一款允许对电子音乐的和声与音高进行实时控制的软件。提出一组音高变换（称为仿射变换），这些变换应用于已准备曲目的所有MIDI流。提出一个结合Ableton Live的MaxMSP实现方案。特别关注在EDM语境下的控制问题、映射机制及现场实践性实验。