This article explains the process of recording At Jack's One Studio for two traditional Batak songs entitled O Tao Toba and Samosir Pulo by Nahum Situmorang . There are several stages that are applied by Jack's One Studio's intructors in recording acoustic instrumental music during the recording process, namely: composing, arranging, recording, mixing, and mastering. The purpose of the study is not only focused in the matter of description, but it is also conducted in order to find out and to observe the concepts and applications within a process of recording using computer program music especially for acoustic instrumental.