Audiovisual teaching apparatus for use in teaching music comprising: a substrate; a sensing plane formed of a first array of conductive tracks provided on the substrate, and an untethered handheld antenna characterised in that the untethered handheld antenna is adapted to transmit a low sub-commercial radio frequency signal; each of the conductive tracks of the first array is associated with a respective different musical note of a musical stave and is adapted to form a voltage-based coupling with the handheld antenna; and the audiovisual teaching apparatus is further characterised by comprising: a second array of conductive tracks provided on the substrate, the second array of conductive tracks being interspersed with the first array of conductive tracks and adapted to isolate individual tracks of the first array so that signals received in a track of the first array do not induce signals in an adjacent track of the first array; sound reproduction apparatus; and a music controller in communication with the first array of conductive tracks and with the sound reproduction apparatus, whereby, when a conductive track of the first array receives a signal transmitted by the untethered handheld antenna, the controller is adapted to cause the sound reproduction apparatus to generate a sound corresponding to the musical note associated with the conductive track that received the transmitted signal. a substrate; a sensing plane formed of a first array of conductive tracks provided on the substrate, and an untethered handheld antenna characterised in that the untethered handheld antenna is adapted to transmit a low sub-commercial radio frequency signal; each of the conductive tracks of the first array is associated with a respective different musical note of a musical stave and is adapted to form a voltage-based coupling with the handheld antenna; and the audiovisual teaching apparatus is further characterised by comprising: a second array of conductive tracks provided on the substrate, the second array of conductive tracks being interspersed with the first array of conductive tracks and adapted to isolate individual tracks of the first array so that signals received in a track of the first array do not induce signals in an adjacent track of the first array; sound reproduction apparatus; and a music controller in communication with the first array of conductive tracks and with the sound reproduction apparatus, whereby, when a conductive track of the first array receives a signal transmitted by the untethered handheld antenna, the controller is adapted to cause the sound reproduction apparatus to generate a sound corresponding to the musical note associated with the conductive track that received the transmitted signal. a second array of conductive tracks provided on the substrate, the second array of conductive tracks being interspersed with the first array of conductive tracks and adapted to isolate individual tracks of the first array so that signals received in a track of the first array do not induce signals in an adjacent track of the first array; sound reproduction apparatus; and a music controller in communication with the first array of conductive tracks and with the sound reproduction apparatus, whereby, when a conductive track of the first array receives a signal transmitted by the untethered handheld antenna, the controller is adapted to cause the sound reproduction apparatus to generate a sound corresponding to the musical note associated with the conductive track that received the transmitted signal.