add volume control in the 3_Second_order_EQ sample

[vinhx]

hi Hans,

thanks you alot with great library to let newbine at arduino guy like can play with adau1401
I try play with the 1_Volume1.ino and 3_Second_order_EQ.ino, it run well as my expected, then I would like to add the volume control feature into the and 3_Second_order_EQ.ino's loop() by add some snippet copy from the 1_Volume1.ino , I upload sketch successful ,but not thing change with the volume leave that I heard
3_Second_order_EQ.ino.txt

// Slowly adjust the volume down to -50dB
Serial.println(F("Fading down"));
for(int8_t i = 0; i > -51; i--)
{
dsp.volume_slew(MOD_SWVOL1_ALG0_TARGET_ADDR, i, 12); // (First volume slider address, dB value, optional slew value)
delay(200);
}

// Slowly adjust the volume up to 0dB
Serial.println(F("Fading up"));
for(int8_t i = -50; i < 1; i++)
{
dsp.volume_slew(MOD_SWVOL1_ALG0_TARGET_ADDR, i); // Slew rate is default 12
delay(200);
}

I try to find the different from header in both those example, so one confuse that I found here
from the 1_Volume1.ino

/* Module SW vol 1 - Single SW slew vol (adjustable)*/
#define MOD_SWVOL1_COUNT 2

#define MOD_SWVOL1_ALG0_TARGET_ADDR 0
#define MOD_SWVOL1_ALG0_TARGET_FIXPT 0x00800000

#define MOD_SWVOL1_ALG0_STEP_ADDR 1
#define MOD_SWVOL1_ALG0_STEP_FIXPT 0x00000800

from 3_Second_order_EQ.ino

/* Module SW vol 1 - Single SW slew vol (adjustable)*/
#define MOD_SWVOL1_COUNT 4

#define MOD_SWVOL1_ALG0_TARGET_ADDR 20
#define MOD_SWVOL1_ALG0_TARGET_FIXPT 0x00800000

#define MOD_SWVOL1_ALG0_STEP_ADDR 21
#define MOD_SWVOL1_ALG0_STEP_FIXPT 0x00000800

#define MOD_SWVOL1_ALG1_TARGET_ADDR 22
#define MOD_SWVOL1_ALG1_TARGET_FIXPT 0x00800000

#define MOD_SWVOL1_ALG1_STEP_ADDR 23
#define MOD_SWVOL1_ALG1_STEP_FIXPT 0x00000800

--- > Question is the the define on "#define MOD_SWVOL1_COUNT 4" and "#define MOD_SWVOL1_ALG0_TARGET_ADDR 20 " cause issue
thank you in advance!!

[vinhx]

update,
today I try add test volume adjustment with 2_First_order_EQ.ino , it run well. I try to compare with the setup both sketch, I cannot figout what different make the 3_Second_order_EQ.ino that it not change the volume level at real. please help to check it, thank you sir!