-I
0
I
waveform
stereo
filter freq
res
440
1440
0
Cancel
÷
7
8
9
×
4
5
6
-
1
2
3
+
0
·
=
-I
0
I
waveform
stereo
filter freq
res
440
1440
0
Cancel
÷
7
8
9
×
4
5
6
-
1
2
3
+
0
·
=
