Build a simple MIDI controller with Raspberry PI (beginners tutorial) Part 1

Рет қаралды 6,750

Күн бұрын

This video shows how to build a simple, one-knob MIDI controller from scratch using an ADC chip and a potentiometer and a Raspberry PI, step by step. // News: Raspberry PI will be back in stores from July 2023 on.
Table of contents:
00:00 hello
00:27 mission statement
01:13 hardware list
02:12 freenove.com/
02:25 install Raspbian
03:01 OS and remote control setup
03:41 install libraries:
03:54 git clone github.com/WiringPi/WiringPi; cd wiringPi; ./build; gpio -v; sudo nano /etc/ld.so.conf - add /usr/local/lib
04:43 sudo apt-get install i2c-tools; i2cdetect -y 1
04:57 sudo apt-get install libasound2-dev
05:07 git clone --depth 1 github.com/freenove/Freenove_... cd Freenove_RFID_Starter_Kit_for_Raspberry_Pi/lib/; sh ./build.sh
05:30 build the hardware
06:51 compiling and running the example app for ADC & potentiometer
08:25 how does this work?
09:11 adding MIDI
13:26 important things to consider
13:46 short demo - does it work? / homework for you :-)
14:18 conclusion
Links:
Freenove starter kit ml6.in/MoZIS
MIDI CC list www.whippedcreamsounds.com/mi..., cmtext.indiana.edu/MIDI/chapt...
ALSA rawmidi www.alsa-project.org/alsa-doc...
C++ code: pastebin.com/9FgUkMAW
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Пікірлер: 44

@bicicogito989 Жыл бұрын

THIS is an awesome primer! This is pretty dense in content but you present it quite well. Must take you lots of time to produce such quality work. Bravo! Looking forward to you followup tutorial(s). I have most all the components. Will try this out in a month or so! BTW, I am more from the hardware/software world, just twirling my toes in the MIDI music realm. I just LOVE where you particularly enter and fit in this wide domain. THANK YOU for your contributions and sharing your time and effort with us all. THANKS!!!

@mr_floydst Жыл бұрын

Thank you very much! This video indeed ate up a lot of time. I hope it does do well in the long term. Compared to other "creators", there's never a lot of interaction and feedback on my videos, so they mostly get views by google searches and not via "the algorithm"...

@doublephantom Жыл бұрын

Fantastic. This is exactly the project I've been looking for, and it's also pitched at the right level. Well done. It will be great to see future videos and how this project evolves.

@mr_floydst Жыл бұрын

Thanks! I'll do some things some viewers asked me about, for example, implementing a MIDI filter.

@spud4242 Жыл бұрын

thanks, this is very interesting. looking forward to more of this.

@mr_floydst Жыл бұрын

Thanks for watching!

@randymeinderts6234 Жыл бұрын

Hey this is cool! As i am learning linux for my job, this is perfect to combine my hobby with learning!

@mr_floydst Жыл бұрын

Thanks! Glad it was useful.

@alanredversangel Жыл бұрын

I have a pi just for routing midi mesages between any devices you plug into it. Works like a charm and having 4 usb ports makes it perfect. For a midi controller though arduino is much simpler, especially if you only need midi out for it.

@mr_floydst Жыл бұрын

Thanks for watching! I agree, but I want to do some more ambitious stuff in the future (e.g. there was a viewer question how to create a MIDI filter). So PI is a good all-round choice here.

@stefandegu5150 Жыл бұрын

I´m so into this series, as my TeensyTouchDAW seems to get out of memory :D Thank you for doing this

@mr_floydst Жыл бұрын

Thanks for watching! :)

@ubidefeo Жыл бұрын

All your videos are extremely informative, I have discovered a bunch of tools thanks to you. Nevertheless I'll still always resort to Arduino for low-friction MIDI implementation 🤭

@mr_floydst Жыл бұрын

You're right, using a PI 3B is shooting sparrows with cannons, as we say 'round here. ;-) But it also leaves headroom for other things...

@ubidefeo Жыл бұрын

@@mr_floydst 100% agree. I actually found you while looking for Pi based music projects and oh my... lots of things to go through :D

@argumentchannel Жыл бұрын

Top

@mr_floydst Жыл бұрын

Thank you very much!

@takawakahd Ай бұрын

Hi there, great tutorial! Just wondering what Ohm should the potentiometers be for this?

@mr_floydst Ай бұрын

Thanks! These are 10k Ohm resistors.

@ElectronicMusicOpenMic Жыл бұрын

More Please👍

@mr_floydst Жыл бұрын

Thanks! The stats don't look promising at the moment, unfortunately. I'll do a follow up showing how to use a multiplexer chip to add more than 4 controls.

@TooSlowTube Жыл бұрын

@@mr_floydst You could use an 8 channel MCP3008 or MCP3208 (more resolution, but not really needed unless you want a pitch or pitchbend CV) to provide 8 inputs over SPI. You might want to use a multiplexer to go beyond 8 inputs, or just add a second chip. You just need one dedicated GPIO pin for each ADC chip, as a chip select pin, then the rest of the SPI connections can be shared.

@jf5070 Жыл бұрын

If I understood (I’m not fluent English) we need a converter for each knob or slider ?

@mr_floydst Жыл бұрын

Hi, thanks for watching! No, the ADC in this video can read up to 4 of them. There are other models around that can read up to 8.

@takawakahd Ай бұрын

Would I need to purchase additional ADC converters if I'm trying to add additional potentiometers?

@mr_floydst Ай бұрын

You'll need a multiplexer, for example the TCA9548A. If you're not familiar with those, here's a link: forums.raspberrypi.com/viewtopic.php?t=368435

@takawakahd Ай бұрын

@@mr_floydst Thanks for replying, I'll look into that one. I did a little research and found an 8 channel ADC called the 'Adafruit MCP3008' , to my understanding this can convert 8 different potentiometers, would you happen to know if this is actually the case?

@DJDiskmachine Жыл бұрын

Cool! Too bad Raspberry Pis don't come with ADC pins built-in, I really feel that's something they should have added by now. o_O

@mr_floydst Жыл бұрын

That would be nice indeed!

@fltfathin Жыл бұрын

electronics design-wise it defeats the purpose of raspberry pi which is to teach low level OS interactions. you'll have better shot using raspberry pi pico instead

@bin-bash Ай бұрын

Will an original Pi model 1 work with this setup?

@mr_floydst Ай бұрын

It should work. There's nothing CPU or memory extensive about this.

@tedysamsi8488 Жыл бұрын

How to make work on orange pj

@mr_floydst Жыл бұрын

Thanks for watching, if you install Orange PI OS (Arch) the steps should roughly be the same. I think I mentioned all the important details here so you can do the transfer yourself.

@tedysamsi8488 Жыл бұрын

@@mr_floydst can you give me tutorial step by step to enable and work serial uart MIDI on orange pi

@c1ph3rpunk Жыл бұрын

Interesting, would be more helpful on a microcontroller, such as ESP32 or similar, rather than a Pi due to issues getting Pi’s. I’ve stopped watching any Pi related project videos due to this.

@mr_floydst Жыл бұрын

Thanks for watching, PIs will be back in July.

@mr_floydst Жыл бұрын

@@c1ph3rpunk I totally understand and respect your point of view. Nevertheless, I think I explained the basics detailed enough for an easy transfer to any other microcontroller / microcomputer.

@c1ph3rpunk Жыл бұрын

@@mr_floydst NAZI deletes comments now? Unsub.

@mr_floydst Жыл бұрын

I didn't delete your comment! But I have a long running problem with comments that contain links. KZfaq deletes those without asking. I pinged KZfaq support a lot of times on that, but they don't care. (I mean, why should I delete that - it was a perfectly valid opinion and you didn't attack me on a personal level there) That being said, be careful with that other N-word. The people you're referring to commited horrendous crimes against humanity, millions suffered unspeakable horrors and other millions died / lost their homes / had to flee. I think disappearing comments, however frustrating that might be in the moment, are not on that level. ;-)