The invention relates to a method for the operation of a pipe organ, with at least one of the valves being provided as a valve actuated in multiple ways which can be controlled to open at least on the basis of two different note demands. The signal comprises a plurality of pulses. Image storage destinations are respectively described to the storage destination addresses. 5, screening the mixture by gravity to separate an alkaline-high-phosphorus solution from a low-phosphorus iron ore; and treating the low-phosphorus iron ore with lime and a natural gas. The method may further include determining at the end of service period whether there are more frames remaining buffered for the station at the AP.