Methods and systems for improving azimuth distribution in a seismic acquisition system are described. The invention also relates to a fungicidal method employing a composition of the invention. A measured signal sampling circuit, a reference signal sampling circuit, a measured alias circuit and a reference alias circuit are connected to the switch, which is operative for switching among the sampling and alias circuits to remove sampling noise and improve switching latency. In a third embodiment of the invention, a liquid reservoir is formed with a recess that is covered by a semi-permeable membrane.