#419

[@MichalKottman]

I love that you don't just cover one topic in each video and make a "series". Instead you give us a comprehensive guide end to end. Thank you!

[@AndreasSpiess]

Thank you for your feedback. Sometimes not easy in 15 or less minutes ;-)

[@iot_cdp]

I second to that 👍🏻

[@atomic14]

I've used Phil's library for a few projects - it's really good work and removes a lot of the complexity of I2S.

[@AndreasSpiess]

Thank you for your feedback! I am also a subscriber of your channel ;-)

[@atomic14]

@@AndreasSpiess You've no idea how happy that makes me. I feel like I have won the internet :)

[@mahudson3547]

Ah, a library that is properly documented. How Swiss!

[@AndreasSpiess]

I agree. Its documentation is good. And I think also the examples. It helps a lot for the beginning...

[@PhG1961]

This is really getting a Swiss channel... an accent, a library... What a great video and really usefull !

[@AndreasSpiess]

You are right! This was truly by chance. There is not a lot of ESP32 audio content around...

[@tedsaylor6016]

I have been wanting to build a "Arduino based" MP3 player for awhile, but didn't see the tools necessary. This video is exactly what I needed. Thank You, Andreas.

[@AndreasSpiess]

You are welcome!

[@georgeyao436]

Wow, sound using I2S has now been demystified. Great work. Creating comprehensive single source of documented and working solutions for audio through internet is great time saver. I use to have to scour the internet and look for information that a lot of times did not work properly or was difficult to adapt to my projects due to code complexity, bugs and undocumented functions. Thanks for spending the time and money so others don't have to.

[@AndreasSpiess]

You are welcome! All the work was done by Phil!

[@RWB123]

I'm using this library for streaming i2s audio from a FM Radio chip to Bluetooth Speakers 🔊 but sometimes it will freeze up as Andrea experienced, at least when I was testing 6 months ago. I also use this library to stream Internet radio to Bluetooth speakers 🔊 or to a I2S amplifier which works well. Love to see more people get involved and keep improving the library.

[@AndreasSpiess]

Cool projects! Let's hope the A2DP issue can be resolved. Maybe you can provide more debugging info to Phil?

[@ed.puckett]

I always enjoy receiving a new episode from your channel. I just have to remind myself: sit down and pay attention! Thank you for such an information-rich source!!

[@AndreasSpiess]

That is the right attitude! Then you do not need to ask questions about things which were presented in the video ;-)

[@johnwest7993]

You are covering exactly what I am working on this weekend. Thanks!

[@AndreasSpiess]

Excellent! Hopefully you get along a little faster.

[@NathanSweet]

Kudos for explaining master clock on the ESP32, and doing it well.

[@AndreasSpiess]

You are welcome!

[@str0g]

Thank you Andreas, send Phil my gratitude

[@AndreasSpiess]

You are welcome! I hope he reads these comments, too

[@koeiekop1973]

Amazing as usual, I gave up on connecting the tiny microphone, but with this library you make it work!! Thanks again for your amazing way of presenting just what we need:)

[@AndreasSpiess]

I hope you will be successful!

[@zolan4277]

I noticed that lately I keep hitting videos with this specific guy with a Swiss accent. After the 5th video I decided, "Well... I guess this guy with a Swiss accent has earned a subscription..." :D Thank you for all of the work you do!

[@AndreasSpiess]

Welcome aboard the channel!

[@avejst]

Impressive find 👍 Great walkthrough of the process as always 👍😀 Thanks for sharing your experience with all of us 👍😀

[@AndreasSpiess]

You are welcome! I am glad this video solves many problems!

[@maximus6884]

Lovely! great efforts! thank you everyone from swissterland!

[@AndreasSpiess]

:-)

[@christosmoutevelis4896]

Classic Andreas , Informative and comprehensive , easy to follow . Thank you !

[@AndreasSpiess]

You are welcome!

[@yekutielbenheshel354]

Yeah! Another ESP32 video! Thanks for creating it. Recording and playing sound is a very useful topic.

[@AndreasSpiess]

Many viewers agree that this is a useful library!

[@cashgarman]

Literally all the information I was looking for for 2 different projects in 1 great video. Thanks :)

[@AndreasSpiess]

You are welcome!

[@AndreasSpiess]

I just saw your Super Thanks on my PC (it is not displayed on the IPad). Thank you for your support!

[@ImnotChuck.]

A video jam-packed with information and ideas! Thanks.

[@AndreasSpiess]

Glad you enjoyed it!

[@knightautomationservices]

Simply Beautiful! Love your work ! Audio was a very big problem for me in my projects but you showed me such a great way to tackle that. Thank you !

[@AndreasSpiess]

Glad I could help!

[@cheesedoff-with4410]

Thank you for bringing Phil's library to my attention at least. You''ve opened up some possibilities for a lot of projects. (One thing, at 9:40 I couldn't get Frankie Laine singing Ghost Riders in the Sky out of my head.)

[@AndreasSpiess]

Unfortunately, I do not understand your reference to Ghost Riders :-(

[@sundwitzi9225]

Really a great project. Thanks for honestly sharing your experiences with all the wrong details a beginner makes. So we all can learn from it.

[@AndreasSpiess]

Glad it was helpful!

[@hi-ccowboy7983]

For those who were confused like I was, streams-generator-csv has been renamed streams-generator-serial.

[@AndreasSpiess]

Thank you for the info!

[@canhobby6286]

Many "dankkes" to our Swiss friends, Herren Speiss und Schatzmann for introducing us to the audio-tools library - quite amazing and a most excellent use of "streams". Typical Swiss product - very high precision... If you dig into Phil's project there are many discoveries to be made. The project I was working on is a musical tannenbaum.. It took me no time to implement Phil's "player" with a LCD2004 display showing the metadata... Being an ESP32, of course, adding a time display is a cinch. Now to dig for another output stream to make the lights on the tree dance... could it be that I get to write a custom stream? sounds like a fun challenge. Keep up the good work, Andreas - I always sit in the front row...😀

[@AndreasSpiess]

Good luck with your project! Still some time till Christmas.

[@YandiBanyu]

THANK YOU SO MUCH ANDREAS! This gives me a lot of idea to play with radio and internet hehehe

[@AndreasSpiess]

Cool. That is very good.

[@PeranMe]

Great stuff as always Andreas! Thanks a lot for this!

[@AndreasSpiess]

You are welcome!

[@gregorymccoy6797]

Amazing content density. Thanks! I am going to try this out this week. I wish I had viewed the video the day it came out... So very busy 😑

[@AndreasSpiess]

We are all busy. No problem ;-)

[@AragonDubs]

What a wonderful guy! Its a pleasure for my mind, all your contents. Many thanks Andreas, 73

[@AndreasSpiess]

You are welcome! 73

[@patrickweggler]

If combined with the esp32-cam and a sip library the next step would be a ESP32 Video Doorbell😁

[@JonnyWaldes]

I thought of the esp32cam too due to integrated SD card reader!

[@AndreasSpiess]

Just do it (and document it ;-)

[@GrzegorzMałetka-s6g]

Share it pls

[@iwbnwif]

Thank you! That has really helped as I bought one of the I2S capture cards some time ago and struggled to get it to do anything except generate noise. It works perfectly with the library you recommend :)

[@AndreasSpiess]

Glad it helped!

[@lmamakos]

I would really like to use a capability like this with Home Assistant to build small devices that I could use to play audio announcements, alerting tones, etc. and maybe also use them for music playback as a flexible media_player type device. More projects to investigate! Thanks for the introduction to this capability that I wasn't previously aware of!

[@AndreasSpiess]

Either using a webserver or an SD card as a source should enable all these projects.

[@peter.stimpel]

Nice topic, so thanks for all the insights, Andreas.

[@AndreasSpiess]

Glad you enjoyed it! I also see some interesting projects...

[@catcam]

Many thanks for nice, useful and calming content in this difficult times. Best regards Niksa.

[@AndreasSpiess]

You are welcome!

[@pete3897]

Looking forward to that video on applying audio filters with this library on esp32! I have a need to hpf audio at about 150hz...

[@AndreasSpiess]

That should be possible... Not decided how I will cover the topic.

[@KittFanNr1]

Thank you for this video! I have currently a problem on an esp32 audio project and this can maybe fix this. Will try it out. Great timing! 🥳🎉

[@AndreasSpiess]

I hope you will succeed!

[@WooShell]

wow, thanks for this video - this library was just what I was looking for. I wanted to make an mp3 receiver with an ESP and was afraid I would have to do all the i2s stuff by hand.. but this makes it really easy.

[@AndreasSpiess]

Glad I could help!

[@H3wastooshort]

imo the ESP32s integrated dac is pretty ok especially for simple audio notifications on your projects

[@AndreasSpiess]

Agreed. We also want to use it for a radio project where bandwidth is limited to 2.5kHz. But for "real" audio it is not good enough

[@emmoemminghaus6455]

@Andreas Thanks for pointing to this library... now i can remove Basic i2s Audio from my projectlist... and give my attention to voice recognithion,

[@AndreasSpiess]

Hopefully you will be successful!

[@L2.Lagrange]

This looks great. Thanks so much!

[@AndreasSpiess]

You are welcome!

[@DavidJashi]

3:05 "Each device can act as a master or... whatever name you prefer" got me in stitches.

[@AndreasSpiess]

:-)

[@arturzyx]

Wow! It sounds great! 🎶 Thanks for sharing it!

[@AndreasSpiess]

Glad you like it!

[@useyourbrain2022]

Thanks, Andreas very well explained as always, we want more 😁

[@AndreasSpiess]

:-) We will see...

[@notofinterest]

Radio Swiss Jazz ❤️. Best Station ever… tnx for using this as webradio sample.

[@AndreasSpiess]

This was Phil's idea! Also Swiss-Pop is quite cool. Maybe only for elder people like me ;-)

[@ulrichbuehler960]

Thanks for the Video, I searching a possibility for 2 way intercom (Microphone and a small Speaker) with Wi-Fi (or Lan) over ESP32? I want to add this add to an Video Stream and use it over a browser. Have you any Idea how to set this up?

[@AndreasSpiess]

Not many such projects are available. So maybe you have to program it yourself.

[@samsonstrike]

Danke!😎

[@AndreasSpiess]

Gern geschehen!

[@lumsdot]

Internet radio on the Esp32 is amazing. check out the Adafruit i2s stereo decoder board, connected to a hifi amp, you get great sound quality. makes you relaize how bad DAB is

[@AndreasSpiess]

These I2S decoders seem to have a decent quality, especially for the price...

[@CraigHollabaugh]

Excellent video Mr. Swiss guy, just excellent 👍. Thank you.

[@AndreasSpiess]

You are welcome!

[@Sysshad]

Keep going Andreas, i really like your videos

[@AndreasSpiess]

Thanks! 😃

[@GillesBruno38]

Nice one :) Plenty of ideas for future tinkering !

[@AndreasSpiess]

True. I have some projects in mind, too...

[@sanityd1]

Great job Andreas

[@AndreasSpiess]

Thank you!

[@miketony2069]

I've struggled on and off trying to understand audio recording and play back on the esp32. Cobbling together examples and trying to decipher the I2S docs. Tha k yiu doe highlighting this. I still want to understand it at a low level, at least now there's a library that works which I can look at.

[@AndreasSpiess]

I agree. Having a working example helps a lot in many cases...

[@jonathanr4242]

Awesome video Andreas.

[@AndreasSpiess]

Thank you very much!

[@redheadredemption3]

Thank you for sharing this!

[@AndreasSpiess]

My pleasure!

[@fillerbloch]

This part with the BT-Speaker sounds nice... Hope you will make an github example. My idea is that to make next Radio project.... and i will use my ESP32 and only one of my many BT-Speaker.... yw

[@AndreasSpiess]

It seems it works with other examples of the library and I was unlucky.

[@electronic7979]

Helpful video. I liked it

[@AndreasSpiess]

:-)

[@daveholden3935]

A very informative video. It 'sounds' as though the ESP32 could form the basis for a microphone audio processor for amateur radio use. Regards.

[@AndreasSpiess]

Yes. That was the reason for these experiments.

[@sevensolutions77]

Perfect, many many thanks... Yesterday i played around with this Ai Thinker board but didnt had any luck because i was unable to get the esp-adf to work. I will try it with this library.

[@AndreasSpiess]

Use the respective examples of the library!

[@sevensolutions77]

@@AndreasSpiess Yep, they are working perfectly fine 👍

[@ThatTalkingDogGuy]

Awesome. At 8:24, though, it's completely fine to have signals up to 5V on ESP32 (just not on power pin). CEO of Espressif has confirmed this

[@AndreasSpiess]

I only heard that for the ESP8266...

[@ThatTalkingDogGuy]

@@AndreasSpiess Teo Swee Ann confirmed that the ESP32 GPIO pins are 5V tolerant. Apparently, they took that out of the datasheet because users were trying to power the chip with 5V

[@klausliesenberg6610]

Cool! New horizons. Thanks

[@AndreasSpiess]

Indeed, it opens new possibilities!

[@mytube1000javed]

Thanks for such a great video. How can I implement voice translation on esp32. Input and output both are voice.

[@AndreasSpiess]

You have to search for a project. I do not know one :-(

[@na5y]

Great video Andreas and thank you for the link ;)

[@AndreasSpiess]

You deserve it ;-)

[@PaulGrayUK]

Great find, it's a skill finding the solution, sometimes you create it - often you reinvent a wheel already out there and you find that wheel, so thank you. Now need to get some ESP32's (already planned), been playing with pico's and the ESP32's predecessor and been fun. But the built-in wifi and Bluetooth on the ESP32, sure does offset the PICO's lovely PIO interface perks and performance. One question - what is a good external ADC at a good price balance for resolution? Also looking at ADC's with multiple channels - they seem to poll one channel at a time. What I want to do is poll 4 ADC ports in sync so that the value I get from all 4 is the exact (close as beyond clock jitter that I want as low as possible) time. What I want to do is read 4 piezo elements (cheap mic's if you like) located around a hard surface like a blackboard and from that, hopefully, work out where contact is made to the surface. Turning any hard surface into a touch interface. Now the ideal plan is to be able to read accurate enough in sync so that I can get a good accuracy of the surface noise location and be able to write upon the board and get a digital representation of that via the sound location of the 4 piezo elements. With that, a cheap and simple device that could digitise any blackboard work. So any suggestions, or pointers and insights etc, would be extremely well received. Thank you in advance.

[@AndreasSpiess]

I made a video about external and internal ADCs. Parallel is always hard. But maybe you do not need parallel, just only s small difference.

[@ronnetgrazer362]

Been working on that myself a few years back, wanted to run it on an arduino for a drum synth input that takes drum surface polar coordinates into account. Life got in the way, but if I were to revisit that idea (some day!) I'd use separate controllers on a common clock to handle all the peak sensing and compare timestamps a few millis later. Might just cut it without lagging too much. I just realized how much faster the signal would move through a solid, so instead of timestamps you'd be comparing levels, of course. The system would need calibration anyway. To cut costs, 3 sensors inputs could be used instead of 4, if accuracy and sensitivity are high enough.

[@PaulGrayUK]

@@ronnetgrazer362 Yip, clock sync is golden for this - cool idea for drums and be funky to see an overhead display of the drummers' actions from another perspective. Hopefully, motivating you into rekindling that project, I know what it is like, many things on the go and flip between them depending upon time, mode and resources.

[@ronnetgrazer362]

@@PaulGrayUK Exactly, there's always another interesting project fighting for attention! I made a million edits to the previous comment btw, sorry for that. And i just now realized that sufficient precision would allow you to fit all 3(?) sensors in the middle of the sensing surface, spaced apart just enough to fit the main PCB in between. Don't know if you figured 4 corners means one sensor on each of them like I did mere seconds ago, but I don't see why you couldn't sense outside of the array as long as specs allow for it.

[@PaulGrayUK]

@@ronnetgrazer362 I was looking at 4 sensors around the outside, so any sound which will be in contact with the surface would have a delay difference for each sensor and with that, want them far apart around the outside and for my objective - 4 should be 1 more than enough and 1 more for a level of accuracy. But need to play and see if 4 is the sweet spot or 5 or 3. What the offset in costs and more so accuracy and see how those plots out. Drums bit more complicated. Don't want to add anything that will change the sound of the drum. So maybe a laser mic would be the way for those and can have under the drum tracking from the underside - how many I'd start with 3, should cover the main area drummers like to play upon the skin (can look at used drum skins to get good idea or area you are targeting to cover). It May work, may not, but be fun to play with as everybody loves lasers. :) However - like any well-formed plan, there will be exceptions - and drummers doing a rimshot would be one that would prove to fall into that path of exceptions. But may also be detectable by the pattern it plays out upon the laser mic array. One of those, try and see.

[@kroojohn]

Thank you. I got an ESP32 KORVO v 1.1 sound development from ESPRESSIF, that seems to have been shipped missing some components. It does have the required I2S DAC and ADC chips though... With this I can finally use the components on there for something useful.. :)

[@AndreasSpiess]

I hope the chips there are usable with the library.

[@kroojohn]

@@AndreasSpiess I hope so too... Got a real bad experience with that particular device.. lots of missing components, technical drawings not up to date etc... but, that is good, as it will be a challenge to see what can be salvaged and repurposed... The library that you referred to will definitely work with the ESP32... it is now up to hunting down datasheets for the supporting components :)

[@TomekUoo]

this is so cool - i want to make small tuner/amplifier/effect for ukulele - this can simplify my work quite well :)

[@AndreasSpiess]

Glad it is helpful!

[@nsd11164]

Hello Sir. I'm from Cuba. I like very much all your videos specially those related to Espressif ecosystem. I use Eclipse ide form my projects. I really aprecciate examples in your videos using that ide. Form ESP-IDF 4.4 Espressif has an IDE based on eclipse. Very useful.

[@AndreasSpiess]

I only use the Arduino IDE on this channel because this is used by most Makers.

[@cookinsteve9281]

On the note of Master/Slave naming scheme….the company I work with calls it Master/Member which I believe is a better encapsulation of what the phrase conveys….just a thought…

[@AndreasSpiess]

So they added a new variant. Interesting!

[@kazemzahedi1047]

Thank you Andreas for the great video. I need to stream a squire wave signal in audio frequency rang wirelessly 20 meters to a receiver. Squire wave can be converted to signe wave if I have to. I could probably use classic bluetooth for transmission. Transmitter is sitting on a metal pole and the receiver is inside a truck driver cabin. What are your suggestions.

[@AndreasSpiess]

I have no idea because I never heard of these protocols or products :-(

[@matambale]

Outstanding, thank you!

[@AndreasSpiess]

You are welcome!

[@gstvgrc]

Hi, is there a way to integrate the I2S microphone to the “camerawebserver” example for the ESP32cam? A full baby monitor!! Thnx

[@AndreasSpiess]

I think so. Just try it!

[@itsjustchris85]

This is really useful. I have been putting off making a smart mp3 player play sleep music at night (along with controlling some ambient lights and switching the bedroom fan on/off). I have purchased a UDA1334A I2S Stereo DAC breakout a while back and tested it tonight as you suggested and it works perfectly! Thank you. I do wish however I was able to figure out how to start the mp3 stream via an MQTT command! If you have any suggestions about this, I would gladly hear them!

[@AndreasSpiess]

Maybe you open an Issue on Phil's GitHub. I am sure you are not the only with this question...

[@santopino2546]

Excellent video, very interesting, pity I don't have time to "play" with this, but it surely will be on my preferred list or pension hobby list.

[@AndreasSpiess]

Cool. A bucket list is very important ;-)

[@neilcameron4680]

The BluetoothA2DPSink library by Phil Schatzmann with an ESP32 connected to a PCM5102 decoder module plays audio via Bluetooth

[@AndreasSpiess]

Cool. Thanks for the feedback!

[@jimTal001]

Andreas, Thank you for sharing your work here. I have been studying many video and other sources about integrating the INMP441 to the RP-Pico or ESP32. In all cases I remain confused with the INMP441's I2S 24 bit data output being mapped directly to 16 bits. Could you explain this? Thanks

[@AndreasSpiess]

You can shift the bits of a 24 bit number by 8 bits to the right (divide by 256). The result should be a (less precise) 16 bit number.

[@AzaB2C]

Very cool! Wonder minimal sized phased array needed to integrate with multicast udp over ku and ka microwave downlink. Could be useful...

[@AndreasSpiess]

I do not understand your comment :-(

[@McTroyd]

Would be interesting to see the impact of this continuous streaming on power draw. I always thought it would be cool to build an Internet Radio for Pandora, and I suspect the ESP32 would be easier on batteries than, say, a Pi Zero W.

[@AndreasSpiess]

I did not check. WiFi anyway is not ideal with batteries.

[@jangAckman]

Liked, thank you, sir!👍

[@AndreasSpiess]

You are welcome!

[@terryhayward7905]

ESP32 is taking over the world. My first computer cost well over £2000, and did not even have sound. I will be running my house on ESP32s :)

[@AndreasSpiess]

That is what we do, too. It is a marvellous chip!

[@renanespinar9907]

I LOVE IT, thank you so much

[@AndreasSpiess]

You're welcome 😊

[@harrymagooslum5770]

Wonderful video!! I'm stuck though: I have the ESP32 v2.0.10 by Espressif installed in the latest Arduino IDE's Board Manager but I do not find the AI Thinker Audio Kit board listed. What board do you choose or is there another board configuration that needs to be installed instead of or in addition to the Espressif one? And does the board program via the UART port or is it necessary (or recommended) to program via the JTAG interface pins on the board? I keep searching the Internet for details on this but come up empty handed. Thanks in advance for any direction that could be provided on this.

[@AndreasSpiess]

The board can be programmed via USB. I use the ESP32 dev module board definition. You need to install 2 libraries and try which board you got. Information and support is on Github

[@nathankatz2529]

Thanks for these vids.

[@AndreasSpiess]

You are welcome!

[@christofrieger2068]

Hi Andreas, wenn er das mit dem Bluetooth noch hin bekommt, hat er das Schweitzer Taschenmesser neu definiert. Das mit dem Bluetooth in zu Audio Out ist dass was ich auf Arduino brauche.

[@AndreasSpiess]

Das läuft in anderen Kombinationen. Schau einfach ab-und zu in seine libraries und die issues. Ich warte auch drauf, denn dann kann man sich den Ausgangsverstärker und die Buchse sparen...

[@h3sus]

Hello! These videos are superb, I'm learning a ton from each one. I'd like to try creating a LoRa system for automating the scoring and refereeing of an outdoor game/sport. Think of "capture the flag" type of game, where players can take control of points in an outdoor area by "checkin in" on the points, and are scored for example based on how long they control each point during a match. I have a small demo of this on an Arduino through Wifi, but the final application will need much longer range than what Wifi can provide, with about 12 points in an area of one or a couple square kilometres. The system should be able to run for two days straight on battery power. I've been looking at ESP32s with a LoRa capability and an RIFD reader (with an RFID tag on every player) to make this happen, but the amount of components on the market is just overwhelming, and new ones just keep coming up. Could you please suggest some parts to start looking at and developing on? I would really appreciate any advice on the most suitable parts as the main board, the reader, LoRa part and the battery.. And if there are any go-to tutorials that you would suggest, I'd be happy to hear about them. Thank you!

[@AndreasSpiess]

This is a very complex project and I do not do consulting, unfortunately. You are on the right track to start with a prototype for every aspect of your project and finally integrate it into an entire system. You find a lot of info on this channel for each aspect.

[@h3sus]

@@AndreasSpiess Thank you very much for the reply. I have managed to make a shopping list for components and am making good progress by following more of your videos.

[@theunderdog2205]

Thanks for your efforts.

[@AndreasSpiess]

You are welcome!

[@kaputzinerable]

Nice work!

[@AndreasSpiess]

Thanks!

[@matteoricci9129]

I saw that the expressf dev has a way to create a Bluetooth speaker or headset example made with the esp32 but not Arduino, could be a nice little project

[@AndreasSpiess]

I agree. You can save the audio amplifier...

[@gamertyp_gamertyp]

Hey das isch genau es richtige video wo ich bruchä dankä 🎉🎉😂

[@AndreasSpiess]

Gern geschehen!

[@technoman9000]

He's the Schatzmann! (Ski-ba-bop-ba-dop-bop)

[@AndreasSpiess]

:-))

[@user-ml1jx3oi8r]

How to connect dac max98357a and microphone inmp441 simultaneously? Thanks

[@AndreasSpiess]

I never tried it. But the ESP32 has 2 I2S interfaces. So I assume you use one for input and one for output

[@philliptoone]

I would REALLY like to see someone get that Bluetooth speaker functionality working. That would be huge.

[@AndreasSpiess]

Others reported that it works.

[@zyroxiot9417]

Muito bom, obrigado! 👍🏼🇧🇷 Thanks,

[@AndreasSpiess]

You are welcome!

[@helmuthbecker7636]

Hi Andreas, thanks for the nice video and content. Here are some questions: 1 - How many ohms has the speaker that you used at valse.mp3 example? 2 - Is there a limitation in ESP32 about speakers impedance? 3 - It is possible an audio comunication between LoRa Rf? A conversation between two people for example. Here is the guy with Brazilian accent :)

[@JonnyWaldes]

Hi Helmuth I am no expert but checkout the i2c audio module he used the MAX98357A. "Output Power: 3.2W at 4Ω, 10% THD, 1.8W at 8Ω, 10% THD, with 5V supply". I highly doubt LORA is good for that application since it is very low transfer rate. LORA would be better for sending text messages.

[@helmuthbecker7636]

@@JonnyWaldes many thanks :)

[@AndreasSpiess]

I agree with Jonny

[@DNPaterson]

Thank you for this. I've been trying to finish a project using other available ESP32/ESP8266 audio libraries but run into problems with reliability or getting the functionality I want. Hopefully this library will help me to finally get it working.

[@AndreasSpiess]

I hope, too!

[@inadavs]

Can ESP32 act as a 2-way VOIP gateway, for use as intercom network for example?

[@inadavs]

And is there any support for SIP?

[@AndreasSpiess]

I do not know about the two-way thing. And about the latency (which is important in this respect. Maybe you try it?

[@gstvgrc]

It would be awesome with ESP-NOW for lower latency

[@eugeniomercol]

Hello again, @AndreasSpiess, I am deciding to buy from your links all the componentes for my project, but I still have a question, I see that you used the ESP32 Wroom board according to the link. But before buying, can you answer a couple of questions? *1 Which board did you select in the IDE list to compile correctly? *2 Did you modify, or add any line of code in the configuration so that it compiles correctly? I try to compile for Wroom or for generic ESP32, and it returns a compilation error for that board. After I managed to compile, I bought all the components from your links. thanx Andreas!

[@AndreasSpiess]

1. I always use the ESP32 Drv board 2. You have to read the error message and correct the error. No errors should occur because of the board. 3. Thanks for using the links!

[@hesspet]

Mist, jetzt muss ich schon wieder ein neues Gitarreneffektgerät bauen. Danke für die Infos. Hast Du schon Erfahrungen zwischen der Latenz Input und Output? Also ADC -> I2S -> ESP.Copy -> I2S -> DAC.

[@AndreasSpiess]

Nein, ich habe keine Latenzmessung gemacht. Schau mal in die "Maximilian" Beispiele rein. Das ist ein Audioprojekt mit vielen vorgefertigten Effekten...

[@hesspet]

@@AndreasSpiess Tnx! Ich habe jetzt erstmal so ein komplettes Audio Board bestellt. Eine guter Punkt um mal ohne viel Aufwand rumzutesteten.

[@batica81]

Amazing video! And I loved the Master/whatever reference :) Do you think it would be possible do use an ADC module with i2s, si5351 oscilator, mixer chip like ne602 and an ESP32 to build a SDR receiver only with modules?

[@AndreasSpiess]

I will cover SDR stuff on my second channel. And this video is the preparation for digital filters which are needed there...

[@rajveersingh-ix6ti]

I wonder if we can make a 2 way communication for home surveillance system.

[@AndreasSpiess]

This should be possible.

[@edivollgas719]

As always watching your video and ideas are creeping, which will cost me some time .... Could it handle streaming webradio from internet and send it to a bluetooth speaker ? Resources Bottlenecks ? Thanks for the allied swiss enabling.

[@AndreasSpiess]

AFAIK Wi-Fi and Bluetooth are exclusive or on one ESP chip (they use the same radio)

[@philschatzmann5281]

Unfortunately the ESP32 does not support Bluetooth and WIFI at the same time.

[@edivollgas719]

ah guessed it..... so its a two-esp solution with i2s in between or esp with audio out as shown ....

[@learner7040]

Could you please let me know how to get the sine wave output from the ESP32's DAC? Thanks!

[@AndreasSpiess]

I thought there was a function in the library for that purpose.

[@learner7040]

I was unable to find it, if possible could you share the function's name? Thanks P.S: The video is helpful!

[@jetblack6243]

Hi ive done coding for recording to the flash memory of the ESP32 and successfully saved the recording with file sizing utilizing SPIFFS as file forwarding system. But it seems like wifi.h FSbrowser(seperate code) wipes out the flash of the esp32 when compiling over to the ESP32 as the file size is then shown as 0B.

[@AndreasSpiess]

Well possible. SPIFFS is not like an SD card because it is part of flash memory.