HighPassFilter issue

[Neilluzorniy]

Hi, I want to use HighPassFilter, but at max volume it goes into clipping (upper image, upper graph). Everything is fine without the filter. How can I solve it?

#include "AudioTools.h"
#include "BluetoothA2DPSinkQueued.h"

AudioInfo info(44100, 2, 16);
I2SStream out;

FilteredStream<int16_t, float> filtered(out, info.channels);

BluetoothA2DPSinkQueued a2dp_sink(filtered);

unsigned long previousMillis = 0;
int ledState = LOW;

void setup()
{
  pinMode(2, OUTPUT);

  filtered.setFilter(0, new HighPassFilter<float>(30, info.sample_rate, 0.7));
  filtered.setFilter(1, new HighPassFilter<float>(30, info.sample_rate, 0.7));

  auto cfg = out.defaultConfig();
  cfg.pin_bck = 18;
  cfg.pin_ws = 19;
  cfg.pin_data = 21;
  out.begin(cfg);

  a2dp_sink.set_volume(32);
  a2dp_sink.start("ESP-Test", true);  
}

void loop()
{
  switch(a2dp_sink.get_connection_state())
  {
    case ESP_A2D_CONNECTION_STATE_CONNECTED:
      blinkLed(1000);
      break;
    case ESP_A2D_CONNECTION_STATE_DISCONNECTED:
      blinkLed(200);
      break;
    default:
      blinkLed(200);
      break;
  }
}

void blinkLed(int interval)
{
  unsigned long currentMillis = millis();
  if (currentMillis - previousMillis >= interval)
  {
    previousMillis = currentMillis;
    ledState = (ledState == LOW) ? HIGH : LOW; 
    digitalWrite(2, ledState);
  }
}