Playing Wave File Using Arduino





Introduction: Playing Wave File Using Arduino

About: Electrical Engineer

This is a simple circuit to play wav files using arduino Nano V3.0 ,it consist from 4 buttons ,each one play specific wav file loaded to SD card.

Step 1: Parts

1- Arduino Nano V3.0 (I used the chines version called Funduino Nano).
2- SD card Module.
3- SD card.
4- Bread Board.
5- four push Button .
6- four 22K resistors.
7- one 4.7K resistor.
8- BC546B NPN transistor.
9- Speaker.
10- wires.

Step 2: Prepare Your SD Card

1- Format SD card and make sure the setting as attached picture.
2- Convert your music to .WAV files and make sure the below:
-Samples Per second(Hz):16000
-Channel :Mono
- Bits Per Sample: 8
I use Wav Sample rate converter software (picture attached).
3- Wave files samples attached.

Step 3: Circuit Digram

Step 4: Source Code

1-Before writing the code you need to install TMRpcm library from below link:
all information how to install and use the library included in the website .

2- Download the attached file and open it with arduino sketch ,I tried to copy and paste the Source Code from arduino sketch to instructable but for some reason the text convert to rubbish.

Step 5: Troubleshooting Update 29/5/2016

For people whom unable to make this circuit work ,I created the attached folder "for test" for troubleshooting purpose .

The folder includes tested code for Arduino Nano ,UNO and MEGA.

No need to connect the push buttons,the sounds will play automatically.

No need to connect the transistor ,Connect a small speaker or headphone directly to pin 9 for arduino nano or pin 11 for Mega .

Copy the .wav files directly to SD card ,Do not put them inside folder.

Pin Connection:

Arduino Nano ---------> SD Card

12 -------------------> MISO

11 -------------------->MOSI

13 -------------------->SCK

4 ---------------------->CS

9 ---------------------->Speaker

GND ------------------>GND

5V ------------------> VCC

Arduino MEGA ---------> SD Card
50-------------------> MISO


52 -------------------->SCK



GND ------------------>GND

5V ------------------> VCC

if the tested code worked fine do the following for the push buttons code file to make it work:

1-If you faced problem in compiling the original push buttons code file ,please add line #include<SPI.h>

in the 3rd line of the code.

still have no sound add a delay command between the play commands delay(1000);

Good luck


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213 Discussions

Why you use analog pin as digital pin instead of original digital pins?

I need help, mine works with sample files but If I try to play music it just makes buzzing sound.

I need help. Im using the UNO and i uploaded it and no audio. No static. Nothing. Im using a 5W 8Ohm speaker.

I'm done i press the buttons, nothing happens. No errors in the script.

I have connected all as you, but my speaker is too quiet. But if I change volume, then quality goes horrible, I can't hear anything. Help?


1 year ago

Hey guys I love your tutorial and thanks for great help :) anyway I tried with my own sound and have some problem with the sound, the sound doesn't clear to hear and I tried to volume up the sound with potentio too but no luck, anyone knows to volume up with this library?

Thanks for your help :) :) :)

Hello everybody! I made this project but there is a noise like motorcycle wirh the sound from sd card. Can you help me? Tks!

the "For" has no UNO file. Can you provide that ? I have been struggle with this project for weeks now. I need some sample with .wav file and yours seems nice. Ps. I tried change pin 4 to 10 already since I have read somewhere that UNO needs pin 10


1 year ago

Thank, n nice project


Is it possible to play each sound on a different speaker?

spi was not declared in this scope..please help..

1 reply

try including the spi library - #include <SPI.h>

hey, just a heads up, when pinning the transistor be sure to look up the pinout and double check before soldering. or you can do what i did and just look at the shape and trust the rest. then spend 3 days trouble shooting. the transistor in the diagram is inverted.

aside from that learning experiance, this is an awesome project and im not sure how but i would like to post a video when i get the entire project done.

2 replies

husham seems like not here that often ..

can you possibly help me nolan?

sorry for the late reply, and ill try and help as best i can. is your question about the one button making random wav files play?

nice work !! sir can u please tell if i connect an audio amplifier instead of directly connecting the speaker to get more sound ??


1 year ago

Hello, thank you for the article, it is very helpful. I do tank on the bluetooth control, and I need the engine sounds. Please tell me: where you took them.

Hep! Thanks for this tuto its working, Ive a question, i would like to know if it possible that the sample play when you press the button, because at the moment le sample play when you release the button (LOW position) and there is a noise when you press (If you keep the HIGH position), do you have an idea ?

Second point, Ive a keypad (3x4 with 7 pins) do I need to use de keypad librairy to use de 12 buttons or is it possible just with the TRMpcm library ?