Stream is live when crew is active. If quiet — they may be asleep (22:00–06:00 UTC). Current crew ↗
▶ Now Playing
🎧Click any clip to start listening
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Transcript / Context
▸ The Voice of Space — What You're Hearing
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Quindar Tones
The two short beeps bracketing every transmission aren't decoration. The 2,525 Hz intro tone triggered remote ground station transmitters; the 2,475 Hz outro tone switched them off. Invented by Radiation Inc. in 1963 — and now the most recognisable sound in space history.
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Apollo 11 — The Real Quote
Armstrong said "one small step for man" — the article "a" was either lost to static or misspoken. NASA's official transcript reads "a man." Linguists have argued about it for 50 years. The audio itself is the only evidence — listen and decide.
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Apollo 13 — The Actual Problem
The famous line was "Houston, we've had a problem" — past tense, spoken by Jack Swigert. The movie changed it to "we have a problem." An oxygen tank had ruptured 56 hours into the mission, 321,860 km from Earth. The crew made it home 87 hours later.
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Space-to-Ground Communication
ISS communications run through the TDRS satellite network (Tracking and Data Relay Satellites) in geosynchronous orbit. This gives ~85% coverage of the ISS orbit. Voice is compressed, encrypted, and routed through Houston's Mission Control before going public.
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Why NASA Releases This Audio
All recordings are public domain under 17 U.S.C. § 105 — US federal government works cannot be copyrighted. NASA's Image and Video Library actively digitizes its archive and provides an open API. This app queries it live — every clip you hear is served directly from NASA's servers.
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The Sound of Static
Early NASA audio used AM radio transmission, susceptible to solar interference and atmospheric noise. The distinctive crackle is real. Apollo-era audio was recorded on 14-track magnetic tape at 15 ips — some of the original tapes were accidentally erased and reused by NASA in the 1980s.
▸ Frequently Asked Questions
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NASA Audio & Sourcing
Where does the audio come from?
Every clip is fetched live from the NASA Image and Video Library API (images-api.nasa.gov), a free, public, CORS-enabled API that NASA provides to developers. Audio files stream directly from NASA's servers at images-assets.nasa.gov. Nothing is hosted here.
Can I use these clips in my own projects?
Yes. NASA's audio is public domain under US law (17 U.S.C. § 105) — federal government works cannot receive copyright protection. You can use them freely in videos, podcasts, presentations, or apps. The only restriction is you cannot imply NASA endorses your project.
Is this an official NASA website?
No. This is an independent tool built by Jasper Bernaers that queries NASA's public API live. It is not affiliated with, endorsed by, or operated by NASA. All audio, images, and data belong to NASA and the public domain.
How far back does the archive go?
NASA's audio library spans Mercury-era recordings from the late 1950s and early 1960s through Gemini, Apollo, Shuttle, ISS communications, and current Artemis program audio — roughly 65 years of spaceflight history in one searchable archive.
Why do some recordings sound crackly or distorted?
Early NASA audio used AM radio transmission, susceptible to solar interference and atmospheric noise — the crackle you hear is real, not an artifact of digitization. Apollo-era audio was recorded on 14-track magnetic tape at 15 ips, and some original tapes were accidentally erased and reused by NASA in the 1980s.
How is this different from browsing NASA's own Image and Video Library?
NASA's library is a general-purpose media search tool. This dashboard is built specifically for audio: it groups clips by spaceflight era, filters out podcast episodes by default, adds historical context and transcripts for famous moments, and combines archived clips with the live ISS space-to-ground stream in one interface.
Why doesn't a clip play?
Some NASA audio assets in the library are metadata-only entries with no attached audio file, or the file format isn't browser-playable. The app tries to resolve the audio URL from NASA's asset manifest and shows an error if none is found. Try a different clip or search term.
ISS Live Stream
Why is the ISS stream sometimes silent?
The crew sleeps roughly 22:00–06:00 UTC. Outside those hours, silence usually means they are working independently without need for ground contact, or communications are routed through a private channel. Active EVAs (spacewalks) and major operations produce the most radio traffic.
Why won't the ISS stream connect?
NASA has migrated much of its live video infrastructure to NASA+ over the years, and the classic space-to-ground audio endpoints occasionally go offline. This tool tries four different NASA HLS stream sources in sequence before giving up — if all four are down, use the NASA TV link to check the current live feed directly.
What is NASA TV Channel 2 / space-to-ground audio?
NASA TV runs several parallel channels; the space-to-ground feed (labeled Ch. 2 in NASA's lineup) carries the raw, unedited audio between the ISS crew and Mission Control in Houston, as opposed to the produced, narrated Public and Media channels.
What language do ISS astronauts speak on the radio?
English is the primary operational language aboard the ISS by international agreement, though Russian is also used, especially around Soyuz and the Russian Zvezda and Zarya modules. Crew members typically learn both languages before flying.
Can I listen to the ISS stream on my phone?
Yes — tap "Tune In" on mobile the same as desktop. Some mobile browsers block audio autoplay, so you may need to tap play again if the stream doesn't start immediately.
Player & Listening Features
What is Ambient Mode?
Ambient Mode strips everything away and shows only a full-screen oscilloscope waveform and the track title, ideal for background listening. Toggle it with the ◎ Ambient button or the A key; press Esc to exit.
How do I download or save a clip?
Click the download link under any playing clip to open the original NASA audio file directly from NASA's servers in a new tab, where you can save it with your browser's save option. Since every clip is public domain, there's no restriction on keeping a copy.
Can I change the playback speed?
Yes. Click the speed button (shows "1×") next to the volume slider to cycle through 1×, 1.25×, 1.5×, 2×, and 0.75×. Your chosen speed carries over to the next clip you play until you change it again.
What are Favorites and how do I save clips?
Click the ☆ star icon on any clip card, or the Favorite button under the now-playing title (or press F), to save it to your Favorites list. Favorites are stored in your browser only — never sent anywhere — and appear under the ★ Favorites filter tab for quick access later.
What does Autoplay do?
When ⏭ Autoplay is enabled, the player automatically moves to the next clip in your current grid the moment one finishes, turning the archive into a continuous listening session. It's off by default so playback never starts unexpectedly.
Can I skip forward or back within a clip?
Yes. Use the −15s and +15s buttons, or the Left and Right arrow keys, to jump within the currently playing clip.
Can I share a direct link to a specific clip?
Yes. Click the 🔗 link icon on any clip card to copy a direct URL (with a ?clip= parameter) that opens this dashboard with that exact recording loaded and ready to play.
Historical Clips & Educational Content
What are Quindar tones?
The two short beeps bracketing many Apollo-era transmissions aren't decoration. The 2,525 Hz intro tone triggered remote ground station transmitters; the 2,475 Hz outro tone switched them off. Invented by Radiation Inc. in 1963 — and now one of the most recognizable sounds in spaceflight history.
Did Neil Armstrong really say "one small step for man"?
Armstrong said "one small step for man" — the article "a" was either lost to static or misspoken. NASA's official transcript reads "a man." Linguists have argued about it for over 50 years — the audio itself is the only evidence, so listen and decide.
What was the actual Apollo 13 quote?
The famous line was "Houston, we've had a problem" — past tense, spoken by Jack Swigert. The movie changed it to "we have a problem." An oxygen tank had ruptured 56 hours into the mission, 321,860 km from Earth, and the crew made it home 87 hours later.
Using This Tool
Is this dashboard free to use?
Yes — completely free with no signup, account, or API key required. It's one of the free tools on this site.
What languages does this tool support?
The interface is available in English, Dutch, Spanish, Arabic, Indonesian, French, Portuguese, Russian, Japanese, and German. Switch languages any time with the 🌐 globe icon in the top bar.
Does this work on mobile devices?
Yes — the layout adapts to phones and tablets, and all playback controls, favorites, and the ISS stream work the same as on desktop.
How do I browse by mission era?
Use the era timeline at the top (Mercury, Gemini, Apollo, Shuttle, ISS, Artemis) to jump straight to that period's audio, or use the filter tabs below the search bar (Milestones, Emergencies, Daily Comms, Quindar, Artemis, ★ Favorites) to narrow by topic instead.
Do I need an account or API key to use this?
No. Everything runs directly in your browser against NASA's free public API — there's no login, no tracking of your listening habits beyond what you explicitly save as a Favorite in your own browser, and no API key to manage.