(a) DSP input side mixer
∙ “IMXL” and “ISEL” parameters correspond to the mixer on the DSP input side.
"MIXS" (explained later on the mix stack) allows multiple slot outputs to be input. This register has a function to mix multiple data. At this time, set "IMXL" to an appropriate value depending on the number of slots to be input, and be careful not to cause "MIXS" to overflow.
∙ The number of sounds that can be input when the value of “IMXL” is changed is as shown in Table 4.25. For example, when “IMXL” is set to “7H” for the input source and the level input to “MIXS” is set to “0 [dB]”, the number of slots that can be input to “MIXS” is 1. It becomes sound.

Table 4.25 Number of sources that can be input to IMXL and MIXS

"IMXL" value [2: 0]	Level		Inputable number of sounds (number of sources)
	[dB]	Magnification
0H	-MAX	× 0.000000	-Sound
1H	-36	× 0.015625	64 notes
2H	-30	× 0.031250	32 notes
3H	-24	× 0.062500	16 notes
4H	-18	× 0.125000	8 notes
5H	-12	× 0.250000	4 notes
6H	-6	× 0.500000	2 notes
7H	-0	× 1.000000	1 note

(b) "DISDL" and "EFSDL"
“DISDL” and “EFSDL” have the same concept as “IMXL”, but these two are determined in consideration of the total number of sound outputs.
The total number of sound outputs refers to the sum of direct components, effect components, and external input components that are in the sound output state. This indicates the number of sources that output sound to the L / R cumulative adder in Figure 4.56 (considering the L / R pair as one). In other words, it is not equal to the sum of the slots outputting sound.