Recent research suggests that singing ability can be characterised by certain stages along a continuum of ability. Development of singing ability along this continuum can be readily assisted by the use of appropriate visual feedback. This paper describes a system working on a BBC microcomputer which enables note pitching accuracy to be developed and assessed. It incorporates a specially developed hardware interface which estimates voice fundamental period in real-time without output smoothing. Whilst it is intended that the system be used with any age group, a recent pilot study has concentrated on classes of primary school children and the results obtained support its use for the development of conscious pitch control. The findings have implications for other areas of voice development in which vocal pitch is significant.