Introduction: Talking Arduino | Playing a MP3 With Arduino Without Any Module | Playing Mp3 File From Arduino Using PCM

About: I am an engineering student and i just love doing electronic (mcu's) and programming (C,C++,JAVA) based projects.

In this instructables we will learn how to play a mp3 file with arduino without using any audio module, here we gonna use PCM library for Arduino which plays 16 bit PCM of 8kHZ frequency so lets do this.

Step 1: Gather Your Components






so in order to do this we need a few components very firat An Arduino & then a speaker 0.5w to 10 w any speaker will do the job then you need to buy a transistor for amplification if your speaker is higher than 0.5w as mine was 3 w so i used a TIP 120 transistor dor amplifying the audio you can use any audio amplifier too.

Buying links. -

Items to Buy (affiliate link) -

Arduino Uno-

Speaker -

TIP 120 transistor -

Step 2: Connections

The connections are really simple if you are using 0.5watt speaker then directly connect the +ve pin of speaker to digital pin 11 on Arduino & -ve pin of speaker to gnd & if using 3 watt speaker then use a tip120 transistor & connect the 11 of Arduino to the base of transistor and -ve pin of speaker to the collector of the transistor & emitter of the transistor to the gnd pin on Arduino.

IIf having issues with connection refer video for help.

Step 3: Download Required Files

To do this you will need few files first of all file to play PCM audio from arduino.

ThEN we will need Audacity software to convert a normal mp3 audio to a 16bit PCM 8hkz audio

& Lastly we need a encoder software to encode that audio into data which we can paste in the code.

DOWNLOAD Audacity -

Download PCM.ZIP & Encoder software (file named as Arduino -

Step 4: Prepare Audio & Convert It Into Data

the important step is to prepare the audio very first we will need a mp3 file either you record one or get one from anywhere then open that file into Audacity and & click on format then select 16 bit pcm then go down & select frequency of audio to 8000hz & export the audio as mp3.

Then open encode audio software & navigate to the audio file we generated froma audacity then you'll get a message audio copied to clipboard successfully.

Step 5: Coding Part

so the next part is coding part , so as you downloaded the the Arduin file which contains file so add this file as a library to the arduino & then open the playback example available in the that PCM library , & there in the sketch you have to edit the 2nd line of code in sample[] arrray which is of programem type you need to remove all the data in that aray & paste the data which is copied to the clipboard by the encode audio software.

Step 6: Upload the Code

so finally our code is ready so upload it to the arduino & you'll hear your recorded audio from speaker , enjoy it & if you have any issues or want to about this in deep just refer the video provided.

Thank you.

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