Digital Audio Processing with STM32 #1 - Introduction and Filters - Phil's Lab #46

very cool

Informative and great examinations of the math in the filter formulas

Woooow great job. 😍😍
Why dont you use TI's dsp microcontrollers??

What would be a good guess for the cost to produce these audio DSP boards? Has anoyone done so already? I can imagine a lot of people who might be adept at an IDE and some light soldering -- but lack PCB and SMD chops -- being interested in buying them ..

Fantastic video and channel. <3

Hello. Thanks for sharing. Where could I download the code shown on this video ? Thanks.

Amazing job with this channel!

Is there a link to the actual STM32IDE project/code?

Very Nice video...!!! Very quickly and in simple way explained the basics...!!!

I know the question has been asked, but haven' t seen the answer yet: what's the latency between input and output? I assume it's something greater than buffer_size / sample_rate -- what do you measure?

I'd rather be using pure CMSIS for audio processing to decrease time consumption caused by all that HAL stuff.
*Many of DSP code snippets can be found with REAPER DAW as JS plugins, but they're written in EEL.

Where can I download the schematic?

Can we purchase this pedal in order to try our dsp algorithms? We can follow you through all videos like a cuorse!

I am more interested in DSP programming for audio applications like the audio equalization, mixer/audio mixing, digital filtering, understanding of the analog ics that made up the analog embedded system (I mean the chip like the dsp audio mixer, audio codec, etc). In digital/mcu based embedded systems there are ics like eeprom, rtc, I/O port expanders, CAN, RS232, RS485, ethernet PHY, etc that made up the system BUT in analog embedded system (again, I mean the DSP based solution) is still to me remain secret and not liberise !

Hi Phil, can you make a video that demonstrate (in code examples) some and useful building blocks of DSP library (CMSIS). In C there are if-then-else statement, the are select case, logical operators etc that made up the C entire program. It would be very helpful to see how the program flows in DSP programming by examples. thanks

Can you speak further about the analog front/back ends you designed between the guitar input and the codec?

I would like to buy a pedal that I can program myself. Has anyone built and made pedals like yours available for sale?
I am comfortable coding in C but not that comfortable populating or designing PCBs and such.

Phil, could you perhaps cover different digital power supply topologies as well? You could start with the basics like short circuit protection and move on to more complicated topics like DC/DC, DC/AC conversion, motor control, regenerative braking, PFC, etc.

Phil love your work as always more power to you ❤️

hi there. am i being silly. i cant find the stm32 project code.

Hi Phil, I had trouble finding the STM32 CubeIDE file, as well as I was wondering if the schematic shown in the hardware overview could be shared please. Thank you for the video

It's sad that, especially as a guy, people don't care about how you feel until it gets bad enough that it's too late. That's why this video is so great, we need to change this.

I, for perhaps obvious reasons, am very excited about this particular series.

Hell yea dude

Sir I want a long range sensor which is a kilometer awayThe New Data Sender Receiver has a range of 1 kilometer and can send multiple data along with it, which is a receiver that can receive the same data.

This is an excellent video.

My only question, since you're measuring voltages, shouldn't your cutoff be 6dB (not 3dB as you use)?

Fantstic Video !!! Thank you !!!

Hi Phil, was really interested in this project and thought I would try and create one with the files you supplied on your git page... sadly JLC are charging quite a bit for some of the real small parts and wondered how difficult the audio codec was to solder? I have done very little SMD but im keen to give this project a go! Thank you for the great video i look forward to seeing more of your content. Thank you :)

Very cool. I wonder how closely you could emulate actual hardware pedals? It would be cool to see you emulate a tube screamer or one of the original hard clipping distortion pedals.

What appealed you to the TLC320AIC as a DAC/ADC? Applications mentioned in the Datasheet don't really match, but that doesn't say much anyway.

Is this dsp also similar to what jbl uses in the charge, xtreme, flip, pulse, boombox series of their bluetooth speakers? I'm currently building a bt speaker, it's drivers are 10-20watts, it's a replacement driver for jbl charge 3, I used tpa3110 amplifier and m18 bluetooth decoder. The sound is good, but I want it to sound like jbl charge 3, it has bass which you can hear loudly. But mine, I don't hear any. Can I use this dsp?

Wow! Great intro tutorial!
Thank you

Wow, nice video !!!!Thank you Phil for great content!

What's the latency? Also great job! SUB!

this helped a lot. thanks. 💛💛💛💛🖤🖤🖤🖤

Thank you again Phil for more great content!
You mentioned that the ADC of the STM32 is not appropriate for sampling the audio signal and that the ADC of a codec IC should be used instead. Why is that?

Mental loadout mate.

what is the latency after the stm32 processing ?

Very nice, great work!

Tour de force!

Hey
Can you make a video on making a bi-directional power delivery Sink source board using the TPS65982 (or similar)
And a synchronous Boost buck converter using
LTM4607

I am making a powerful Powerbank with 100W PD port and 300w (20v 15A) port for my laptop
Can you help me out?

This is crazy interesting, excellent job, Phil. Please, anyone feel free to ask questions about the ADP3450 or WaveForms! Cheers, all!

This is really good stuff. I really like how you are going into the meat of the content and then summing it all up with a real world example. As some others have said, I'd gladly pay for a DSP course. Lastly, nice socks.

The bolck diagram is really nice, may I ask how you creat it ? Thank you very much!

Would be interesting to see how you determine how many cycles each algorithm takes and how much CPU load. I don't know if it done through statistical profiling or if you use some time measurement technique like watching clock cycles.

Any chance you'll be supplying the gerber files for your GDSP board so we'all can get our own made? (nudge, nudge, wink, wink)