ESP32 Sound - Working with I2S
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- Опубліковано 28 тра 2024
- Build an Internet Radio, an MP3 Player, and display microphone waveforms with an ESP32 and some I2S peripherals. Learn to use the I2S sound protocol with the ESP32.
Article with code: dronebotworkshop.com/esp32-i2s
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You might have seen the term “I2S” on the spec sheet for the ESP32 and may have just assumed that it was a form of I2C. Well, you would be mistaken - I2S is a protocol for manipulation of digital audio, and today we will be using it with the ESP32.
After a short primer on I2S and digital audio fundamentals, we will use an I2S microphone module with an ESP32. We’ll display the microphone output as a waveform on the Arduino IDE Serial Plotter.
After that, we will grab a library from GitHub, and we’ll use it to build an MP3 player with an I2S amplifier module. We’ll then use the same library and the ESP32 WiFi to create an Internet Radio.
Finally, we will convert our simple Internet Radio into a stereo device, with a volume control.
Here is what is in today's video:
00:00 - Introduction
01:27 - I2S & Digital Audio Intro
08:25 - I2S Peripherals
10:18 - Using an I2S Microphone
18:37 - I2S MP3 Player
28:31 - Simple I2S Internet Radio
33:41 - Stereo Internet Radio
43:56 - Conclusion
Remember, if you need any of the code used here, you'll find it on the DroneBot Workshop website at dronebotworkshop.com\esp32-i2s.
Hope you enjoy the video!
Bill - Навчання та стиль
WARNING - This video contains a very bright shirt and may be harmful to your eyes! I'll have to remember not to film wearing that one again, sorry, I didn't realize how intense the color was until UA-cam rendered the video.
Otherwise, I hope you enjoy the video!
Bill
That shirt is brighter than my future.
No! The color is great. It brightens up everything.
My wife is in charge of fabric colours around here and says your shirt is good. So there you go.
No problem, Bill. Didn't even notice.😎
Did notice, but it doesn't change the contents. Which still is of excellent quality and pedagogic, as usual.
I always wanted to learn about I2S and here is all in one theoretical / practical tutorial !!. Thank you for your awesome work.
You are setting the standard for excellence in tutorial videos; on UA-cam and elsewhere! Well done! The content is very interesting and useful. Thank you so much!
Your videos are so excellent! I tought stuff like this for 20years and was losing interest, but after seen the qualty and content of your videos and teaching methods I am back at experimenting. Love it! thanks!
This is an amazing channel. One of the few with thorough explanations for people like me with no background in electronics but eager to learn and hopefully complete some projects.
WOW! Sir, with this one you simply have over excelled yourself. I have been craving this tutorial. And it covers everything. Thank you and be blessed.
Just a note: The wiring diagram for the INMP441 at 13:04 doesn't immediately match the code download on your page: Specifically, GPIO pins 32 and 33 are switched. Easy fix, thanks for the clear explanation.
Thankyou...I was disappointed it didn't work the first time but changed the pins and it works great!
Cool tutorial. Great to hear someone knowledgeable on this weird protocol.
Thank you so much for this video, I just spent literally hours trying to navigate the world of I2S libraries to try and get a simple microphone + speaker to work. This video helped so much for the background knowledge and hopefully I'll be able to figure it out now 🙏
Thanks for your dedication to sharing your expertise. Really inspiring!
What a clear en extended explanation of this subject. Thanks !
I really like how you present your projects, I know it's alot of passionate work.
Thank you for more excellent content. I think this channel is amazing and you have quickly become my go to guy when researching my ideas. I'm currently trying to use both ESP32-CAM and Wrover boards to build CCTV cameras for my home and wondering how to record audio with the video. This tutorial though now has me thinking of how I can add some totally custom sound systems to both my bar and my camper van. Thank you so much.
You are very pedagogical and yet concise. Very good!
Excellent video Bill!
Didn’t notice the shirt until I read your comment !
Copy write does make it difficult to show how well audio projects work , I see a lot of it with vintage radio channels and they don’t seem to have a problem as long as it is very brief - less than 2 seconds and usually they try to stick to stations that only play instrumental stuff like classical .
Thank you very much!!
You are a good teacher.
Thank you for sharing your time and knowledge with everyone!!!
Thanks for a nice compact tutorial on i2s and internet radio.
Excellent bundle of projects - much appreciated, plus thx for the latest newsletter! 👍
Also, testing internet radios is safer (from copyright hits) tuning into talk stations... but we trust you. 😀
Excellent explanation and demonstration on the I2S protocol with the esp32. I'm planning to make an Internet radio and this is exactly the detailed information I needed, thank you.
Did you build the radio? I did works great. I'm stumped at the volume control. My 'no brand' 38 pin dev board has no pin GP39 nor can I find ADC03 on any of the ESP Vroom 32 pins. Any help here would be appreciated.
You are awesome sir, i am truely honored to find you. Thank u for all of your perfect tutorials. Love from Iran
Great video. It covered a lot of what I was looking for!
Thank you!
Awesome idea! As always a super described tutorial and nice explanation
Thank you, Bill! Very informative video, as always. 👍🙂
ありがとうございます！ こんなに分かりやすい解説に出会って、ラッキーです。
Thank You!
Very good tutorial, clear and extended explanation of this subject ! Respect !
I'm using the Teensy 4.1 as a waveform synthesizer, outputting 5 discrete signals (X, Y, red, green, & blue) to a laser projector. There is a total of 17 waveforms being generated, including 4 * X/Y pairs for the basic image, 2 pairs for AM pulsing, 2 triples for RGB color modulation, and one for intensity modulation.
My favorite area!. Thank you Bill.
Very very good video. Great job! Might try to build the internet audio for my grandson.
what I like about this channel is the very good explaination from theory to actual. Lot to learn from this channel
Very good guide for I2S Thank you
Bill, thanks for your hard working and good sharing, so many details
Thanks for letting me know about 0nradio.
It was a very good project, thank you for making a decent video about it!
You are fantastic! You just opened the door to many ideas for me! Thank you very much!
Yes, same here. Bill; Andrew Spiess, the guy with the Swiss accent; Christopher Barnatt, from Explaining Computers; and others have had the same impact on myself.
I'm currently building a laser show system for my living room.😎
Now this is called quality content. Subscribed!
This was an amazing video!
I do have 2 ESP32 modules, each with different pin counts. I haven't even opened them up yet. LOL
I will have to get my butt into gear and learn the ESP32. It is so much more powerful than any Arduino board and it seems to be just as easy to use... maybe even easier.
Great video Bill! Going to try an internet radio
Awesome work, thanks for sharing!
Thanks DroneBot Workshop for your tutorial
Your channel is a treasure for me
Thank you
There is a small mistake at 2:08, I2S works with PCM (pulse code modulation), not pulse width modulation.
Love your videos! Thx for this great tutorial.
I immediately went looking for this comment. lol
clear, concise, thank you!
You create great videos. Thanks.
Super helpful for my project, thank you!
Thanks for posting on this topic sir....
I was looking for it 😉😉
Note that some SD card breakout boards do need to be powered with 5v, and have a built-in voltage regulator for 3.3v operation.
Thanks! This is perfect! Your videos are so helpful!
Thank you, glad you found it useful!
Very informative and interesting video. Wonder if there are any good modules that output line level audio signal, to use with external amplifiers.
Thanks Bill! Did you have a chance to do the experiments on PlatformIO? Just curious about the stability of the library.
I learned a lot trough this video, thanks so much... You're amazing
Love the esp 32 content!
Great video, thanks
Great tutorials, earned my Sub!
Excellent,as usual 😁👍🏻
Thank you too much! despite on my low level in English, i have understood nearly 100 percent, really useful video!
I love your work
Nice video. I have a bunch of things to try now... 😀
Watching a few months late. Outstanding tutorial as usual!
Hi, thank you so much for the excellent video.
May you please help me by answering the question below.
What are the most common real time examples in which SOC is used as Target ( i.e other peripheral is giving SCK and WS signals ).
Would you also please mention the devices which can be used as master.
Thank you
Thank you , great video
Nice info, thanks for sharing :)
Great video, ...as always.
Very helpful video 👍
Excellent explanation as expected. Thanks a lot. Can a robotic project be made using these devices to work on voice commands without depending upon Google home
, Alexa and several other 3rd party applications?
simply perfect! Tks
Bill ur awsome .... very well presented....
Thank you very much I'm just trying it since 2 weeks ago
great Tutorial!! 👍👍
It is absolutely maddening how little you discussed choosing the correct speaker.
Very nice video, TNX.
Thanks!
Thanks for this video. Very intriguing. Where do you get the URL's for the music sources?
Thanks!
Awesome channel!
Thanks for this video. It was helpful. One thing to consider: the Adafruit SD breakout contains a voltage regular to convert 5V to 3.3. You connected the input of this regulator to 3.3V instead of 5V. This (usually?) works because the regulator has a very low voltage drop, but it still has a drop. You will be running the SD card at 3.2 or 3.1V rather than 3.3V. Maybe it is better to connect the SD breakout 5V pin to the ESP32 VIN (5V) rather than the ESP32 3.3V. The SD breakout uses a 4050 hex buffer that is powered from the 3.3V rail. So, it causes the signal outputs to be 3.3V. regardless of the voltage supplied to the SD breakout via its 5V input. This works for 5V systems (e.g. Arduino boards, not ESP32s) because 3.3 is more than 2.5V, and the 4050 tolerates 5V inputs.
If for some reason one must drive the SD breakout with 3.3V, I think it would be OK to connect a 3.3 supply to the SD breakout's 3.3V pin. This bypasses the regulator.
excellent point! Thank you
Fantastic!
Hi Bill. Thanks for the great video. You teach better than most people. with all due respect to Andreas, your videos are more comprehensive than his. I think his work should not stop you from
doing what you do better. I need to learn how to send audio streaming from one ESP to another through Bluetooth. or ESP now, Would you shed some light on this, please? Thanks
very good lesson, God bless..........
thank you very much
Great video and useful for my next project. Although my first try failed due to missing PSRAM. My ESP may not have it . Can I tweak the sketch to use available flash for memory buffering?. Thanks
Thank you for your awesome work. What abour soundtransfer over WiFi, like remote microphone
Since you demonstrated microphone input, and speaker output, one assumes that creating something that will both record and play back sound is possible with an I2S device and the proper modifications, correct? I look forward to playing around with this at some point. It will make a nice addition to my tricorder project.
Thanks from 🇧🇷
Thank you.
I am somewhat sure that the size argument in i2s_read() function is the size in byte(how many bytes you wish to read) and as you are using 16bit samples the bufferLen should be multiplied by 2 or more correctly sizeof(sBuffer[0]). As you used only the bufferLen only half of sBuffer will be filled with samples.
Very neat video. Im thinning ill put one of these into an old vintage rca radio. Suggestions on power supply?
Good video. I want to learn how to have an i2s source sending stereo sound to the esp32 and a decoder playing it back using DMA, at the same time.
Works for me!
Hi, Bill great video for audio with ESP 32 as usual. How can I transmit the audio wirelessly to another ESP 32 through blue tooth or Wifi
You could use VLC to stream DRM free music from your computer over the network. That'd provide a safe web radio for recording.
Yes, great suggestion. I attempted building a poor man's SONOS multi room sound system, by streaming audio from VLC to RPi 'receivers', with audio HATs. Unfortunately, I was too stupid to figure out how to keep them all in sync.
BTW, now I prefer VLC for recording video, but use Audacity for recording audio. Just discovered Animotica for video editing, but not convinced that it is the best free editor.
BR😎
Wonderful tutorial. Exactly what I needed. Thank you so much. The only thing I don't understand is the fact that you only seem to own one Micro SD card. 🙂
Looks like the Adafruit stereo board highlighted at 9:46 is discontinued. They have a "replacement" board, but it's not stereo.
wonderful 10x
Pls make complete videos on individual video on ,MP3 player with buttons and internet radio with tune option
I love you man
Thanks for the great description of working with audio. It all looks pretty straightforward, but I haven't gotten around to getting any I2S peripherals yet. BTW, I like the looks of those jumper wires you use -- can you tell me where you got them? I also heard about a VS1053 MP3 decoder on another ESP32 channel -- is that similar to what you're using? What are the differences? (It would be handy to have links to the hardware you use accompanying the video.) Thanks!
Good Job, good job, good job...
Hey
Nice explanation about I2S and many examples, I tried running in esp-idf, there are errors any changes needed and also I have a esp32 board where mic is embedded so I have to remove only the connections given in code or any other changes is needed
Hi, Good video, but I also know you could use the module's internal bluetooth to play audio?
thanks for your vedio
Just in time! Thanks for the video.
What is your recommendation on modules, IC, or components to get always to cleanest sound ? Because I want to focus on making synth or sample-based works, and want to look at the right parts from the start.
Btw, I can't believe you are so polite about making the video late so don't look like you copy Andreas. I think most the people don't care about two good videos about a topic ;)
I highly recommend starting with the Teensy 4.x and he Notes and Volts' YT step by step tutorials. That's where I learned the basics to build a 5 channel, 17 waveform laser synth, with mixers, multipliers, LFOs.
BTW, there is also Teensy synth kit being sold online.
ua-cam.com/video/uCA2L7CeWSE/v-deo.html
The front panel and PCB for the controls can be purchased for ~100. I purchased one, as well as all of the pots, just to see what was involved, but never did anything with it.
Let me know if you would like it. It's already boxed up and ready to ship.😎
@@TheOleHermit Thanks ! what an impressive synth, that's a great start and takes a friendly approach to how it works. I gonna take a look.
It haves a clean look and way of building.
@@salvadorkda5758 Glad you like it.
Sooo...
does that mean that you would like to have my unused Teensy Synth kit?
If the answer is, "Yes", then we should discuss the details via email.
However, when I'm not a maker/laserist, I'm a no BS online keyboard warrior of politics. IOW, revealing my email would expose my identity and potentially place my life in serious jeopardy.
I see that your YT channel is as locked down as mine. So, if you don't mind providing me with your email, then we can proceed with this transaction in private.
You can easily delete your YT comment as soon as I reply or whenever you like.
😎
@@TheOleHermit I'm not interested in buying one atm. But thanks for the offer :D
What resistors did you use for the SD pins for the left and right channels?
Legend 🙂👍👌