Life & fun · alternatives · 2026
24 alternatives to Recreate NASA's Apollo Space Beeps (Quindar Tones) with Web Audio
How to recreate Quindar tones - the high frequency beeps used in the Apollo missions
This resource explains how to recreate Quindar tones, the distinctive high-frequency beeps NASA used during Apollo missions to control ground transmitters. It details the technical specifications: a 2525Hz sine wave to… Below are 24 products that do a similar job, ranked by how close each is in meaning and then by launch-day votes. Recreate NASA's Apollo Space Beeps (Quindar Tones) with Web Audio launched in 2015; newer entries below may have overtaken it.
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Get the most popular messaging services, all in a single app. WhatsApp, Signal, Instagram, Telegram, and more.
2021 · beeperhq.com · its alternatives →
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Beep! 2.0▲871Fastest tool to assign and share visual tasks with your team
2023 · justbeepit.com · its alternatives →
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An intuitive 64-step drum sequencer progressive web app built using React, Redux, and Tone.js
2021 · sequencer64.com · its alternatives →
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Octave TTS▲282Describe any AI voice and prompt its emotional delivery
2025 · hume.ai · its alternatives →
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Hi HN, r2t2 is a command-line tool for transmitting data through sound using the PC speaker on the motherboard. The name of the tool is a reference to the R2-D2 robot from Star Wars :) In short, you type some message and it gets FSK modulated and transmitted via sound through the PC speaker. Note that this is the speaker/buzzer that you connect to the motherboard and not the regular speakers that you connect to the sound card. I also made a simple web page that listens to the sound emitted by r2t2 and decodes the received messages. The page can be used by simply opening it on your phone…
2021 · github.com · its alternatives →
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I built maketonesonline.com — a simple browser-based tone generator to experiment with the Web Audio API. What it does: Generates tones from 20 Hz to 20,000 Hz Supports sine, square, triangle, and sawtooth waveforms Lets you adjust frequency, volume, and left/right stereo pan Includes multi-tone, binaural beat, subwoofer/bass frequency, and sweep tone modes It’s useful for testing speakers, hearing tests, exploring sound design, or just seeing how high a pitch you can still hear. Check it out: https://maketonesonline.com I’d love your thoughts, bug reports, or ideas for…
2025 · maketonesonline.com · its alternatives →
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Studio2600 for the Atari VCS / Atari 2600 – Online demo powered by Javatari
2018 · masswerk.at · its alternatives →
- 8T1
2017 · inverted3.gitlab.io · its alternatives →
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C Pixels-based graphical audio synthesizer implemented as a WebSocket server - grz0zrg/fas
2020 · github.com · its alternatives →
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Hi HN - My name is Andrew, and I'm a high school student. This is a write-up on StratoSpore, a payload I designed and launched to the stratosphere. The goal was to test if we could estimate physical altitude based on algae fluorescence (using a lightweight ML model trained on the sensor data). The blog post covers the full engineering mess/process, including: - The Hardware: Designing PCBs for the AS7263 spectral sensor and Pi Zero 2 W. -The biological altimeter: How I tried to correlate biological stress (fluorescence) with altitude. - The Communications: A custom lossy compression…
Nov 2025 · radi8.dev · its alternatives →
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BeepThatOut▲108Hi all, my friend and I have built an AI-powered (whisper) editor for youtubers, podcasters, and video editors, that should cut down manual editing time by a lot. It's 'a bit' more than just a whisper wrapper, because you can configure a lot: - what kind of profanities to filter - add your own words (i.e. 'covid') to prevent demonetization on platforms like youtube - adjust the transcript in the editor like in google docs - readjust the position of each word - use 1000Hz beep, silence, or your own sound and more. You can export your work as audio, video, or as an .xml project for popular…
2025 · beepthatout.com · its alternatives →
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Zyphra Zonos▲134Highly expressive TTS model with high fidelity voice cloning
2025 · zyphra.com · its alternatives →
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Stable Audio 2.0▲156One shot sample generation for the SignalsAndSorcery.com platform - shiehn/sas-sample-generator
2024 · stability.ai · its alternatives →
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SlideSynth▲49— Move touch up and down to change frequency, move touch left and right to change volume. — Tap the logo to loop, tap again to stop looping, tap yet again to cancel the loop. — Tap the waveform icons to change the waveform.
2024 · slidesynth.com · its alternatives →
- 17AS
I recently learned about some fascinating research done at MIT for potentially treating Alzheimer’s using light and sound stimulation at 40 hertz. Nothing has been proven yet, but it seemed compelling to me, especially given the safety and simplicity of the treatment (i.e., no drugs, no electrodes, just looking at light and hearing sounds). I wanted to try it myself, but was surprised how hard it was to find something free and easy to use to generate such pulses. Which is odd because I remember some freeware DOS program I tried back in the 90s which did all this kind of stuff (anyone know…
2024 · alzheimersbuddy.com · its alternatives →
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Devialet Dione▲103$2400 soundbar w/ a rotating speaker for optimal positioning
2022 · devialet.com · its alternatives →
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Beep▲74Get notified when cryptocurrency markets are added to GDAX
2018 · beep.network · its alternatives →
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WizzyPoke▲88Instant vibration alerts across all browser tabs.
Jan 2026 · wizzypoke.com · its alternatives →
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The world's first voice-activated HAL 9000 replica
2018 · indiegogo.com · its alternatives →
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Ranked by how close each launch is in meaning, then by votes. Prices were read from each product’s own site when checked and can change. Refine with your own description →