See the table – Extron Electronics MTPX Plus 6400 Series User Guide User Manual
Page 56

Highest
# input
button lit
dB of
attenuation
Output
volume
Highest
# input
button lit
dB of
attenuation
Output
volume
Highest
# input
button lit
dB of
attenuation
Output
volume
2
3
4
5
6
7
8
1
39
41
40
42
43
49
50
51
52
53
54
55
56
57
58
59
Highest
# input
button lit
dB of
attenuation
Output
volume
44
45
46
47
48
60
64
61
62
63
64
0%
None
23
24
25
26
27
28
29
30
9
10
11
12
13
14
15
16
17
18
19
20
21
22
31
32
63
5.5%
47
29.5%
31
53.5%
15
77.5%
62
7%
46
31%
30
55%
14
79%
61
8.5%
45
32.5%
29
56.5%
13
80.5%
60
10%
44
34%
28
58%
12
82%
59
11.5%
43
35.5%
27
59.5%
11
83.5%
58
13%
42
37%
26
61%
10
85%
57
14.5%
41
38.5%
25
62.5%
9
86.5%
56
16%
40
40%
24
64%
8
88%
55
17.5%
54
19%
53
20.5%
52
22%
51
23.5%
50
25%
49
26.5%
48
28%
39
41.5%
23
65.5%
7
89.5%
38
43%
22
67%
6
91%
37
44.5%
21
68.5%
5
92.5%
36
46%
20
70%
4
94%
35
47.5%
34
49%
19
71.5%
3
95.5%
18
73%
2
97%
33
1
50.5%
17
74.5%
98.5%
32
52%
16
76%
0
100%
33
34
35
36
37
38
Table 4.
Audio volume adjustment settings
MTPX Plus 6400 Series Matrix Switchers • Operation
50