Reggaeton-Be-Gone Disconnects Obnoxious Bluetooth Speakers

If you’re currently living outside of a Spanish-speaking country, it’s possible you’ve only heard of the music genre Reggaeton in passing, if at all. In places with large Spanish populations, though, it would be more surprising if you hadn’t heard it. It’s so popular especially in the Carribean and Latin America that it’s gotten on the nerves of some, most notably [Roni] whose neighbor might not do anything else but listen to this style of music, which can be heard through the walls. To solve the problem [Roni] is now introducing the Reggaeton-Be-Gone. (Google Translate from Spanish)

Inspired by the TV-B-Gone devices which purported to be able to turn off annoying TVs in bars, restaurants, and other places, this device can listen to music being played in the surrounding area and identify whether or not it is hearing Reggaeton. It does this using machine learning, taking samples of the audio it hears and making decisions based on a trained model. When the software, running on a Raspberry Pi, makes a positive identification of one of these songs, it looks for Bluetooth devices in the area and attempts to communicate with them in a number of ways, hopefully rapidly enough to disrupt their intended connections.

In testing with [Roni]’s neighbor, the device seems to show promise although it doesn’t completely disconnect the speaker from its host, instead only interfering with it enough for the neighbor to change locations. Clearly it merits further testing, and possibly other models trained for people who use Bluetooth speakers when skiing, hiking, or working out. Eventually the code will be posted to this GitHub page, but until then it’s not the only way to interfere with your neighbor’s annoying stereo.

Thanks to [BaldPower] and [Alfredo] for the tips!

A 360° View Of A Classic Drive-In Speaker

Readers of a certain vintage no doubt have pleasant memories of drive-in theaters, and we are chuffed to see that a few hundred of these cinematic institutions endure today. While most theaters broadcast the audio on an FM station these days, the choice is still yours to use the chunky, often crackly speaker that attaches to the car window.

Seeking to relive the drive-in audio experience at home, [codemakesitgo] picked up a drive-in theater speaker on eBay and turned it into a Bluetooth device that sounds much better than it did in its weather-beaten days outside.

There isn’t a whole lot to this build — it’s essentially a new speaker cone, a Bluetooth receiver, an amp, and a battery. The real story is in the way that [codemakesitgo] uses Fusion360 to bring it all together.

After 3D scanning the case, [codemakesitgo] made sure each piece would fit, using a custom-built model of the new speaker and a 3D model of a custom PCB. Good thing, too, because there is barely enough clearance for the speaker. Be sure to check out the brief demo video after the break.

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Upgraded Toy Guitar Plays Music

Getting the finishing details on a Halloween costume completed is the key to impressing friends and strangers alike on the trick-or-treat rounds. Especially when it comes to things like props, these details can push a good Halloween costume to great with the right touches. [Jonathan]’s friend’s daughter will be well ahead of the game thanks to these additions to a toy guitar which is part of her costume this year.

The toy guitar as it was when it arrived had the capability to play a few lackluster sound effects. The goal here was to get it to play a much more impressive set of songs instead, and to make a couple upgrades along the way as well. To that end, [Jonathan] started by dismantling the toy and investigating the PCBs for potential reuse. He decided to keep the buttons in the neck of the guitar despite their non-standard wiring configuration, but toss out the main board in favor of an ESP32. The ESP32 is tasked with reading the buttons, playing a corresponding song loaded on an SD card, and handling the digital to analog conversion when sending it out to be played on the speaker.

The project doesn’t stop there, though. [Jonathan] also did some custom mixing for the songs to account for the lack of stereo sound and a working volume knob, plus he used the ESP32’s wireless capabilities to set the guitar up as a local file server so that songs can be sent to and from the device without any wires. He also released the source code on the project’s GitHub page for anyone looking to use any parts of this project. Don’t forget there’s a Halloween contest going on right now, so be sure to submit the final version of projects like these there!

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2023 Halloween Hackfest: A Spooky “Severance” Speaker

If you know, you know. After becoming fully engrossed in the sci-fi psycho-thriller “Severance“, [Ben Brooks] absolutely needed to have a version of the ominous speaker known as the Board.

This speaker represents the Board, who is the enigmatic governing body of Lumon Industries, the fictional and gigantic biotechnology company featured in the show.

The Board cultivates an air of mystery by rarely speaking, and when it does, it speaks through a single person who paraphrases the Board’s responses. The audio that comes out is a mix of the show’s theme song, pertinent show quotes, and static.

The guts of this freaky little thing are pretty simple — an ESP8266, a DF Player Mini, and a couple of small speakers. In fact, [Ben] had all the parts leftover from a previous home automation project, including the PCB.

Although the original plan was to program it in Arduino, [Ben] ended up using ESPHome to make it easier to integrate with sensors for the big night. Be sure to check out the demo video after the break.

We’ve seen a few fun hacks for the porch this year, including the treat trough of terror and this Ouija robot that out-creeps the real thing.

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A Speaker With Dancing Ferrofluid

A speaker project isn’t usually very different, but we couldn’t help but notice [Electronoob’s] latest speaker not for its audio performance but because it features dancing ferrofluid and is an unusual work of art. The housing is 3D printed and includes some translucent portions for LEDs.You can see and hear the speaker at work in the video below.

Apparently, not all ferrofluid is created equal. You can get just the fluid, but then you have to work up some sort of carrier fluid. You can also get the material already in a glass with a carrier fluid, which is a better option. Apparently, you can also get cheap material that is little more than iron filings suspended in a liquid. That’s not really ferrofluid.

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This One Simple Trick Rehabilitates Scratchy Sounding Speakers

We’ve all picked up a radio and switched it on, only to hear an awful scratchy noise emitting from the speaker. [Richard Langer] is no stranger to this problem, and has identified a cheap and unusual solution—using toilet paper!

The cause of the scratchy sound is that when the speaker’s paper cone warps, it can cause the voice coil to rub up against the magnet assembly. In time, this wears out insulation on the coil’s turns, damaging the speaker. [Richard] found that realigning the coil to its proper place would rectify the issue. This can be achieved by stuffing a small amount of toilet paper in the back of the speaker, between the cone and the metal housing.

To identify the right spot to put the paper, one simply presses on the back of the speaker with a pen while listening out for the scratchy sound to stop. The paper can then be stuffed into this area to complete the fix. This can realign the cone and voice coil and stop the scratchy sound for good.

[Richard] notes that this method can be quite long-lasting in some cases. Failing that, it should serve long enough for you to order a replacement speaker. Video after the break.

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Lo-Fi Tchaikovsky

[Kevin] over at Simple DIY ElectroMusic Projects recently upgraded his Lo-Fi Orchestra. To celebrate his 400th blog post, he programmed it to play Tchaikovsky’s 1812 Overture. Two Arduino Nanos, four Arduino Unos, four Raspberry Pi Picos, and one Raspberry Pi have joined the Lo-Fi Orchestra this year, conducted by a new Pico MIDI Splitter. Changes were made in every section of the orchestra except percussion. We are delighted that the Pringles tom and plastic tub bass drums remain, not to mention the usual assortment of cheap mixers, amps, and speakers.

Tchaikovsky’s score famously calls for some “instruments” not found in the typical orchestra — a battery of cannon and a carillon, for example. Therefore [Kevin] had to supplement the Lo-Fi Orchestra for this performance with extras — a JQ6500 MP3 module on clash cymbals, a bare metal MiniDexed Raspberry Pi playing the carillon, and a MCP4725 with a Lots-of-LEDs shield firing off cannon and fireworks, respectively.

Although slightly disappointed that the MCP4725 beat out Mr. Fireworks in the auditions, we do like the result. [Kevin] reports that the latest version is much more reliable and predictable, having eliminated various MIDI faults and electrical noise. It presents a stable platform for future musical presentations, a kind of on-demand Lo-Fi Orchestra jukebox, as he describes it. A detailed review of all the changes can be found in his explanatory blog post. Check out an earlier performance of Holst’s The Planets suite from our coverage back in 2021.

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