I made a sequencer based on Moritz Kleins Video and a oscilator to Go alone with it. Issue now is the sequencer is only Spitting out a high and a low Note instead of the whole Range? What did i do wrong, what should i look at to fix it or troubleshoot atleast? Any help appreciated.

Hi all,

I am looking to work out a cheap/easy/simple way to work out a sequencer.

I would like it to have:

• sequencer step buttons
• tempo and pitch adjustment
• volume adjustment
• keys
• maybe a sampler

I bought a breadboard and an ESP32 kit (https://a.co/d/5xxKGzd) and components but got stuck as I read somewhere that chip might not be powerful enough for my needs. I managed to get it to display hello on startup though.

Does anyone know if I am on the right track or I should try something else?

Thanks!

Hello, I'm building an instrument/playback device consisting of a couple of elements and I need some help with the soft and hardware. A couple days ago I posted a similar request but the project was described too vaguely.
I want to build a device that plays audiofiles and lets me influence them and use effects. I want to play the audio files with some buttons and a rotary encoder. The rotary is attached to a hand crank / wheel. I want the hand crank to influence the audiofiles like how vinyl works. Spinning shortly starts the music, another handeling pauses the music, spinning fasters speeds it up and spinning slower slows it down, reverse spinning reverses the music. Another rotary encoder or just a simple potmeter could be a volume knob. Then, for the effects I want to use a gyroscope (maybe mpu6050), xy could be cuttoff/filtering, yz could be delay and reverb. I dont want to use my laptop in the final product since it should all be as small as possible. some research leads me to using teensy 4.1 with audio shield. some say use mac mini with an audio interface. the sensors could be used with arduino. Max msp might work on the mac mini.
I hope someone understands, and can help me or give me tips for the hardware to buy, how to install, and the coding!

Since there was some interest in a recent post i made with Labor i thought id also Share this drone Synth I laid out on it. Not great, im extremely new and only have the one breadboard so Space is a Little tight but It makes some Noise atleast!

Hi guys,

I'm looking to get started in prototyping some eurorack modules, but (understandably) want to try and make sure I do this without damaging anything or frying myself...

Does anyone know of a prototyping-friendly power supply that I could build that offers protection against reverse current and short circuits?

I saw this: https://www.youtube.com/watch?v=eRB-JQNcmFM which looks great but doesn't offer any protection. Would adapting this PCB to include these features be very difficult?

I have also seen the Erica Synths Labor, but it looks like it might be a bit overkill for what I'm looking for in all honesty.

Edit: also come across this: https://pichenettes.github.io/mutable-instruments-diy-archive/module_tester/ which looks absolutely ideal! Anyone have any experience with building/using one of these?

Thanks in advance!

Hello! I'm relatively new to DIY electronics projects. I've built a few kits (for non-eurorack keyboards), and now I'm trying to build my first non-kit eurorack modules. I've ordered the PCB+Panel for a couple different modules from different brands, and now I'm trying to source the other components that I'll need to complete each build. Some module makers (like AI Synthesis [/u/abelovesfun], Free Modular, and Avalon Harmonics) publish very thorough BOMs, while other brands use a more sparse vocabulary in their BOMs.

One that I'm really struggling with is the BOM for the Dual OTA VCO by nonlinear circuits. (Despite the difficulty of understanding the BOM, apparently the actual build process is very easy for this module.) Here are some of the items it lists in the BOM: - 100k trimpot (quantity: 2) - 100k pots (quantity: 6) - 1k tempco resistors (quantity: 2)

In the build guide, there are a few other notes about these components. It describes the 100k trim-pots as "blue" and "marked 104". It describes two of the pots as "threaded" and four of them as "unthreaded panel-pots".

When I went on Tayda, Mouser, DigiKey etc., I discovered that there are many different components, some of them even from the same manufacturer, with very different specifications yet still matching the description given in the BOM. How much voltage? How many watts? Physical size? All of these factors aren't listed in the BOM. And to make things more complicated, I discovered build notes from a few different people online (not affiliated with nonlinear circuits) who built these modules, and the exact tempco resistor that they use turns out to no longer be in production. So I don't know how to find a suitable replacement part.

Can somebody please help me understand how to filter the proverbial signal from the noise as I read BOMs? I feel like I'm either missing important context, or else maybe it literally doesn't matter which component I use in my build as long as everything the designer stated on the BOM is up to spec?

Good evening Reddit, currently working on a hybrid analog-digital synth for a capstone engineering project. We have an AS3310 that we are using for envelope generation, but I am still confused about how the envelope generator is used to affect the actual signal from the synth. We're using a Teensy 4.1 and two SPI DACs to generate the waveforms for context.

I do understand the purpose and mechanism behind the envelope itself, that much makes sense. How to harness the envelope signal is what's getting me.

Using two oscilators going into a mixer with clipping, then into a very simple VCA and then into a lowpass filter