Digital Control of Analog Pedals
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- Опубликовано: 4 сен 2021
- This is the first installment of "Talk Nerdy to Me"
On today's episode of the Jacksunday show, Brad dives into the nerdy details of light dependent resistors and how he uses them to control analog circuits.
#jacksunday #talknerdytome #jacksonaudio
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On the next Talk Nerdy to Me, I'd love to see some of the process of writing the code for the microcontroller. It's something I'd love to dive into, but don't have much of a concept of where to start.
That's a phenomenal idea!
Rad! Really enjoyed listening to this episode and I look forward to seeing more of what you’re working on.
Cheers!
This video may be old news, but I wanted to express sincere thanks for putting this out into the world. I'm just getting started on a DIY effects-and-controllers journey, and I am really hoping to build some kind of digitally controlled analog effects unit.
The ideas and basic info here are gold for me right now, having also recently started to explore Pure Data for DSP and MIDI as well as microprocessor and microcontroller possibilities (e.g., Daisy Seed, Teensy, Raspberry Pi). That's all been good learning, but this feels like a real breakthrough regarding something I am keenly interested in that has been difficult to find plain-language practical information about.
Digital controls and presets for otherwise analog circuits. Yeah. Very cool. Exactly what I've had in mind. Now I know it can be done, and I have a solid starting point for experimentation. Cheers. 🙂
This is super super cool stuff.
Brad, absolutely loved this episode of Talk Nerdy to Me. I used to dabble in electronics when chips were relatively new and transistors were hot. It’s been long enough that I’ve forgotten much of the knowledge I once possessed and also the skill. I still buy parts and put together gadgets others have designed, but that’s it. Listening and watching you show interest in these electronic details stirred my own interest and excitement. Glad you do this stuff. And I also enjoy your finished products. Still watching for the chorus. Thanks for what you do!
Thank you so much Garry! That's super encouraging! :)
Ooo, proprietary!! Congrats, Brad, on a good fix. There is a great feeling of accomplishment that comes with identifying and implementing a better way to do something. Thanks for sharing.
And Thanks, Josh, for holding the camera steady enough to see those tiny components.
Things I never realized I was interested in. Super interesting! Thanks for sharing and teaching!
Glad you enjoyed it!
Thanks for this video Brad. I’ve been using the Bloom and Broken Arrow professionally since they were released and you’re really putting out some great products. I’d love to see you collaborate with Chase Bliss, especially with regard to digital control.
This is the coolest thing ever. Thanks so much for taking the time to explain this Brad. Ive been wondering for a while now how you make your pedals happen. MAJOR kudos, my Golden Boy works absolutely perfectly, every time. And sounds nuts. You the man.
Lastly, thats a dope ass outro song. Lol
Well, thank you! This points me in the right direction for how I will approach MIDI->analog resistance for expression/volume pedal support for a DIY midi controller I'm working on.
love this!!
I really enjoy watching the behind the scenes (#BTS) on these high quality and high class pedals! My Asabi is the classiest pedal on my board. Well done, Brad! 👊🏼
thank you brother! :)
thanks for sharing, cool content
Reallly interesting! Looking forward for time based effects from jackson audio, more engineering and ingenious solutions for sure
Amazing explanation (and video), Thank you! Mordi.
Glad you liked it!
u need to do one of these talk nerdy episodes on impedance staging in pedals...i just got a bloom v2 midi and it's a breath of fresh air to get out of it exactly what you put into it, all the sparkle and chime and harmonics of the pickups, all the deep sub bass low end that extends endlessly, it all makes it through the comp/EQ/boost stages to the output 1:1 even after maxing out the effects, I've never heard a pedal sound so transparent and crystal clear and hi fi, the only other place I've heard gear sound/feel that invisible is playing guitar through universal audio Apollo interfaces with unity plugins. a lot of dirt pedal creators could stand to benefit from knowing how to stage impedance, you can have the dirt circuit right but mismatched impedance in places and it will feel stiff and muffled no matter what EQ you do to it, I have no idea how it works but I'd love to learn how it's done, I have an asabi on the way too now cause I know if bloom is done that way so perfectly the dirt and overdrive out of the asabi is going to feel like a million bucks from proper impedance staging
This is awesome, thanks for your content! I already built some guitar pedals and tube preamps, and also worked on projects using Microcontrollers, so at the moment I'm doing exactly what you started in 2017. I already experimented with a H11F1 FET optocoupler, changing resistance with PWM, it works like a charm. I haven't tried passing audio through it, but I heard somewhere that the PWM might affect the audio. Based on your experience, is this true? Maybe not, since it seems you use this technique (Do you use 2mm WS2812 LEDs? ) I'm thinking about using a DAC to control the LED's brightness, so I ordered some to try it. Also, I want to try using LDRs as well since they're cheap. Would you recommend a specific model? Thanks again!
thanks! as a pedal designer myself I often wondered what would be the best solution for digital control! what made you create this solution becaus I find it hard to beleive that manufactured vactrols have worse tolerances than your solution? is the financial benefit that much worth the effort?
Hi Brad!
Really cool episode today. I asked you this question through your "Ask Jackson" mailbox as well, but since I feel like this topic heavily relates, I'll ask it here too.
I don't know if the question is too big to answer in a comment, but I would love to know how the concepts you explained in this video are able to alter the signal that is running through the pedal? :-)
My original question was a bit more extensive than this, but I'd still love to know!
Also loving the production value of these videos, everything is crystal clear and easy to see, even the smallest parts your showing of.
Keep up the good work!
Big 👍 to the “talk nerdy to me” section. That ruled.
Very cool! I'll keep doing it! Help me spread the word will ya? :)
@@JacksonAudio can do
Hi, I’m trying to build a pedal with some ldr controls, but I read somewhere that they may introduce distortion because of their non linearity. Do you hear something o (better) have you measured thd?
Would you consider doing a video on using a midi baby 3 with the Golden Boy. I'd love to get into midi but have no clue, thanks!
Sure thing!
Great video brad!
I have a project in mind involving digipots, I was woundering did you try adding a capacitor to the output of the digipot? I figure this might smooth out the zipper noise, let me know if you tried that I'm real curious.
I would imagine that putting a cap on the output would change the frequency response.
... and you're not really addressing the zipper noise problem. The digipots I've seen employ an internal array of fixed value resistors effectively connected to a multi-throw switch. For a 100k pot with 256 tap, each resistor is around 391 ohms, so your first tap is zero, second is 391, third is 782... There's no value between the steps, it's not a continuous sweep like a physical pot provides. Un-F'in-fortunately. Cuz like Brad, I'd love to be able to use them for audio effects. Suppose they might be ok for switching presets, LFO rates, etc, but probably not pots in the audio path that will be tweaked in real time.
Hi I’m from india, and also working on same idea from last 1year. But never thought of using LDR. How will you emulate 3terminal pot with 2terminal ldr?
Btw Sir, excellent effort. Love to hear more from you.
Please release some form of the Highrise, even a more Analog version- Less digital controlled version if that would be easier to produce 🙏🏻🙏🏻🙌🏻🙌🏻🙌🏻
Perhaps. ;)
Man I am really dumb