An apparatus for processing a biological sample is provided, the biological sample being arranged on a first planar surface of a carrier. For a brass instrument, the apparatus comprises an embouchure sensor and a breath pressure sensor to detect the embouchure and the breath pressure of the player as heshe plays the brass instrument. Significant synergistic improvements are realized from both physical and functional integrations of the multi-frequency operational capability into a single integrated flow survey system. The drive signal to the sensor is made substantially sinusoidal by ensuring that all the elements in the feedback loop providing signal gain and attenuation are configured to operate in a substantially linear mode. A manifold is in communication with the impulse tank for directing outflow of water from the impulse tank to the chamber to eject the body from the chamber. In a preferred embodiment, a cysteamine compound is administered to a subject to treat an influenza virus infection.