Various alaryngeal voicing methods have been devised and put to practical use for people who lost the ability to speak normally due to the removal of the larynx. The objective of this study is to improve the quality of alaryngeal speech so that people who have lost their voices can communicate more freely. For the purpose, it is necessary to create a system that can control nonverbal information such as voice quality with the same degree of subtlety as normal speech. As a first step, we developed a prototype interface that allows the user to control the pitch of vocalizations with the rotation of the wrist. We believe that this interface will allow the user to control the pitch of vocalizations as desired, without requiring special training. In fact, the author’s own trial use of the interface showed that after 30 minutes of practice, the accuracy of pitch control was improved, and to some extent, the speaker was able to speak at the desired pitch. The author also tried singing with the system. The results suggested the possibility of improvement in singing as well as normal singing. Therefore, the proposed interface was shown to be suitable for pitch control.