-- card: 7601 from stack: in -- bmap block id: 0 -- flags: 0000 -- background id: 3551 -- name: -- part contents for background part 3 ----- text ----- bandpass filter -- part contents for background part 4 ----- text ----- removes the frequencies above and below the cut-off point. Allows only a specified range (a band) to pass through. -- part contents for background part 16 ----- text ----- 177