I2SAudio Library, work in progress 2. (ESP32 I2S Audio, WAV, MP3)

Episode 2 looking at current progress of my new I2S Audio Library which is an implementation of my DACAudio library.
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ESP32 : amzn.to/3gaIuXR
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I2S 98357A boards: amzn.to/3s3rUNo
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Credits
Intro/Outro Music by Creo Music : www.creo-music.com
Some sounds from Freesound.org
Some images from OpenClipart-Vectors from Pixabay
Some videos from www.pexels.com/
Spectrum Image : en.wikipedia.o...

[@davidburke52]

Great project. Look forward to incorporating it into my own.

[@XTronical]

It's main priority at the moment, so as long as real life work doesn't get too much in the way then progress should be good.

[@brianharper9798]

Really interesting, I'm really interested in synthesizers and think maybe with a few additional commands could be the basis of a nice tone generator. Possibly ADSR and maybe the ability to play multiple tones at once. Great work, really looking forward to seeing where this is going.

[@XTronical]

It has ADSR coded now but need to check with my scope to ensure waveform looks right. Multiple tones at once is implemented. One of my original aims was to be able for it to mimic a synthesiser. Thanks for your comments.

[@brianharper9798]

That's fantastic, already having ideas for a VCO for use in maybe a modular system. The code to do the Volt per octave and gate input should be fairly straightforward.

[@dr_frost_dk]

Nice as i need a beep for the laser rifle taget system

[@ernstgennial7064]

Very nice!

[@dr_frost_dk]

Nice work so far :), looking forward to SD card play and Speed/Tempo for WAV files

[@XTronical]

Speed /tempo next along with sequences then sd card.

[@Slider2732]

Great, cos i'd like to make a 'rompler'. Load up classic patches such as a Korg M1 piano from SD card and off we go (if polyphony is going to be a thing). Btw, ZX Spectrum and Austin Allegro in one video... marvelous :)

[@domoticainfo]

Love that you share the progress. Out of curiosity; where on your backlog is using the memory of the esp32? Since i use the library for a lightsaber for my son and i don't have to much space in the handle. I'd love to use the onboard memory to play random mp3s of sound effects.

[@XTronical]

That's implemented using wavs already. But not mp3 yet.

[@domoticainfo]

@@XTronical it's a great start! Since i can always use less wavs then and add more mp3 later. I'll follow your efforts. Thanks for the answer

[@Harvid.]

Will you consider to make it able to stream sound over wifi ? It could be very useful for make a home music system, one Esp stream to multiple other Esp "players".

[@XTronical]

I don't mind adding that in, but it's after the other stuff I'm afraid

[@Harvid.]

I have ford about this for couple of years. That was actually how I have found your channel :-) My ider is like.. Phone - bluetooth to Esp base station. And Esp base station to "player" Esp's. Diy home speaker system and you can turn on/off in any room No hassle I just want to share that idea with you.

[@lavishninja5100]

Awesome brotha! Question how big of a file could be played or time wise say if I wanted to play a 30 sec mp3? Hows the sound quality?

[@XTronical]

At top notch quality 32 bit 44100 samples per second about a Meg. But that's far more quality than is required in my opinion. 16 bit would be fine and would half that storage amount. I will be implementing sd card storage in future

[@lavishninja5100]

@@XTronical thanks for the reply, trying to get around a 40 second clip with good quality , this the video I should reference?

[@XTronical]

If you just want to play 1 mp3 at a time then check out this video using a different library kzbin.info/www/bejne/fJKYl2t_q96kpaM My new library is more sophisticated but may be more than you need.

[@WistrelChianti]

Is there a benefit to using i2s over the DAC or is it simply just another way to do things? (Which is fine and useful of course)

[@XTronical]

Yes, the dac only supports 8bit mono sound. I2s supports upto 32 bit stereo sound. So much higher quality.

[@WistrelChianti]

@@XTronical ah thanks for the explanation. I assume it had 2 DACs for stereo but indeed the greater quality is reason enough

[@XTronical]

You could implement the two dacs as stereo, it was requested for the old library. But it would use up another dac pin and for a not much improvement. So I decided to go i2s for this. Thanks for your comments.

[@WistrelChianti]

@@XTronical no! Thanks for the libraries and the nice demos!

[@dr_frost_dk]

Add sounds to the Musicscore as INSTRUMENT_PIANO option then you have made a MOD player/creator system :)

[@XTronical]

Yes, my original idea with DACAudio was to make it like a synthesiser, and with this version too.... Eventually anyway!