Getting wired value from MSGEQ7

i'm newbie on arduino. trying read volume msgeq7 module. 1 chip gives me 0 time, , gives me 229 or 230, both ignoring input. i'm confused.

i used nodemcu 1.0 (esp8266 esp12e breakout board), not sure if matters. input earphone jack of computer display.

program:
#include "msgeq7.h"
#define pinanalog a0
#define pinreset 2
#define pinstrobe 12
#define msgeq7_interval readspersecond(50)
#define msgeq7_smooth 0 // range: 0-255

cmsgeq7<msgeq7_smooth, pinreset, pinstrobe, pinanalog> msgeq7;

void setup() {
  // set ic ready reading
  msgeq7.begin();
  serial.begin(115200);

}

void loop() {
  // analyze without delay every interval
  bool newreading = msgeq7.read(msgeq7_interval);

if (newreading) {
    serial.write("vol: ");
    serial.println(msgeq7.getvolume());
  }
}

breadboard settings photo attached.

note - i've never used msgeq7 understand concept of how works...

did write code or known-working example?

the msgeq7 timing critical , if it's not known-good code, serial print statements might messing-up timing.    serial communication slow-down loop.

you may need run awhile until it's giving data , print data, maybe once per second or once ever few seconds instead of printing every time through loop.      you'd use millis() in blink without delay example.

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