Arduino audio playback without SD card not working? [closed]

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I want to create a circuit that plays mainly 2 audio, one when it gets power and another audio by pressing a button. I want to create it without SD card. Library used is PCM. Here is the code sample.

#include <PCM.h>

const unsigned char sample[] PROGMEM = {
  0,6,14,22,30,38,46,54,60,68,74,82,90,98,106,114,112,
  };

void setup()
{
    startPlayback(sample, sizeof(sample));
}

void loop()
{
 
}

if anyone knows how to play audio in arduino using button (without sd card) help me...

Solved : By adding INPUT_PULLUP

You didn't ask a question. Learn how to read digital inputs arduino.cc/reference/en/language/functions/digital-io/… and do PCM on the Nano arduino.cc/reference/en/libraries/pcm — mmixLinus
– mmixLinus, Commented Nov 18, 2021 at 9:30
Does that sample work for you? I doubt that these 17 bytes of data produce some recognizable sound. The original sample has a couple thousand bytes. — datafiddler
– datafiddler, Commented Nov 18, 2021 at 11:24
The added sound signal is not actual, when I added the actual sound it works — Arjun_B
– Arjun_B, Commented Nov 18, 2021 at 12:54

mmixLinus · Accepted Answer · 2021-11-19 07:40:13Z

1

const unsigned char sample2[] PROGMEM = {
    100,96,84,72,60,58,46,34,20,18,4,12,20,38,46,54,62,
};

int inPin = 7;
void setup()
{
    pinMode(inPin, INPUT_PULLUP);
}

int lastPin = HIGH;  // HIGH means not pressed for Pullup Inputs
void loop()
{
    int pin = digitalRead(inPin);

    if (pin == lastPin)
        return;

    if (pin == HIGH) {
       startPlayback(sample1, sizeof(sample1));
    } else {
       startPlayback(sample2, sizeof(sample2));
    }

    lastPin = pin;
}

edited Nov 19, 2021 at 7:40

answered Nov 18, 2021 at 10:12

mmixLinus

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4 Comments

datafiddler Over a year ago

you have to trigger the pin status change from LOW to HIGH ( or opposite ) and debounce it ( or wait some time for the sound to finish )

Arjun_B Over a year ago

Tried the answer of @mmixLinus, it not playing both. But when I changed digitalRead to analogRead and changed pin they both works . But now the problem is that the second sound(play when switch pressed) is playing continuously. Not stopping until switch released.

mmixLinus Over a year ago

modified code to make the button input pullup (so digitalRead should work) and handle playing both samples. Start playing 1 if button is pressed, start playing 2 if button is released.

Arjun_B Over a year ago

Thank you, @mmixLinus and @datafiddler Earlier I forget to add the INPUT_PULLUP , Now its working.

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