; test the effects of the lowpass filter

f	1	0	8192	10	1	; sine wave

i	1	0	12	1	; 12-second blast of noise
i	2	15	12	1	86	; 12-second obnoxious buzz

i	3	0	6	13000	1000	1	100
i	3	6	3	1000	7000	100	200
i	3	9	3	7000	1000	200	400

i	3	15	6	1720	172	1	20
i	3	21	3	172	1720	20	40
i	3	24	3	1720	86	100	1

e