0
2
4
6
8
10
-1
-0.5
0
0.5
1
signal
primary vs. a secondary scale
signal
0.5
1
1.5
2
2.5
3
3.5
-3
-2
-1
0
1
2
3
per-channel spread
noise floor
0
0.05
0.1
0.15
0.2