Abstract: An instructional system and method for students of wind instrument that include audio/video depictions for viewing by users of the system and method an instructor performing steps on a wind instrument, an animated breathing bar presented at least during a time period over which a user is to attempt to replicate the steps demonstrated by the instructor, such breathing bar to visually command a user to alternatively inhale or exhale (while producing tones on his or her wind instrument), and visual indicia instructing in textual form the step or steps to be carried out by a user. A system can include one or many steps being demonstrated and prompted for recreation by a user, as well as additional presentations, such as metronomes, interactive tuners, and the like.

Abstract: An instructional system and method for students of wind instrument that include audio/video depictions for viewing by users of the system and method an instructor performing steps on a wind instrument, an animated breathing bar presented at least during a time period over which a user is to attempt to replicate the steps demonstrated by the instructor, such breathing bar to visually command a user to alternatively inhale or exhale (while producing tones on his or her wind instrument), and visual indicia instructing in textual form the step or steps to be carried out by a user. A system can include one or many steps being demonstrated and prompted for recreation by a user, as well as additional presentations, such as metronomes, interactive tuners, and the like.

Abstract: A method for preparing distortion-compensated images on film reticles for e in a plural optical projector readout unit. An oversized matrix of the images is prepared with each legend proportionately positioned in the field of view corresponding to one of the plural optical projectors. A very short focal length lens having one surface flat and the other convex is placed over the matrix with the flat surface adjacent thereto. The images, distorted through the lens, is photographed to produce a film reticle in a size suitable for use in the readout unit. The spherical aberration induced by the lens closely approximates the barrel distortion from the off-axis projection and magnification in the readout unit. In this manner, the image projected on the screen from the film reticle proportionately corresponds to the images in the matrix.