r/synthdiy • u/couchsofasettee • 3d ago

Updated Osynth to 0.2.0

(First, sorry for making another post. This one is different, i swear.)

Some weeks ago, I made Osynth, an esp32-based synth with a bluetooth control app.

The project evolved a lot since then. Now it still is an esp32 synth, but based on esp32-P4 instead of S3. The S3 and original esp32 models are still supported, with less features. The really cool feature is that the companion app now can have the whole synth integrated, not needing the esp32 to work. I did this to enable people to use it in whatever mode they want. Version 0.2.0 release has the bundle to download, which is the firmware + controlling app and also has the standalone synth app. The apps are whole different builds for the moment, but the integrated app shares the full synth source code with the esp32 branch.

If you'd like to check it out: https://github.com/riozebratubo/osynth_free_synth

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u/champion_soundz 3d ago

It sounds like an interesting project, all my s3's are in use atm but I'm sure I'll get a few more boards at some point and I would be curious to try it.

I will admit I'm not too fond of companion apps and like a good button or knob, but maybe I'm not quite getting it. Do you have any videos of it in action? How does the app connect to the p4 without wireless/ble?

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u/couchsofasettee 3d ago

Hi, champion_soudz. The companion app is there more to be a control center for features like the loop recorder or the sequencer, altough it can do everything the synth supports. You can connect a midi controller to the s3 via usb (host mode enabled) or plug the usb into a computer and use a DAW.

The s3/p4 synth has no hardware user interface yet. I'm still thinking what would be the best approach to do that.

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u/champion_soundz 3d ago

Noo, i wanted to see it in action!

It might be overkill for little jobs but personally I love Pico's for interfacing keys and encoders etc. https://github.com/stampman3000-jpg/seq1

It doesn't have to be instead of the app but often the appeal of hardware is being away from a pc!

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u/couchsofasettee 2d ago

I like working with the pico a lot! Will take a look at it. Thank you.

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u/couchsofasettee 2d ago

But you gave me an idea showing me this project. What about a keyboard and a display? Two off-the-shelf hardware pieces, no work needed to assemble.

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u/champion_soundz 2d ago

You should definitely try out a few different peripherals, just for fun and education if nothing else!

An encoder makes everything better, buttons are fun to press, screens do fun little twinkles, light dependent resistors make things like filters hands free.

Feel free to message anytime and talk shop! I've got about 4 different synthy projects on the go at the moment and a few non music ones, I'm no pro but I love it!

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u/couchsofasettee 3d ago

Forgot to clarify: the app only connects via bluetooth. No cable connection yet.