256 Royalty-Free Audio Tracks for "Frequency Sweeps"

A 1500 Hz tone broadcast by WWV, the radio station of the United States National Institute of Standards and Technology.

The A440 (A above middle C) tone, which is used as a general tuning standard for musical pitch. It is also broadcast by WWV, the radio station of the National Institute of Standards and Technology.

Siren effect with digitally controlled frequency sweep using 96khz crystal controlled oscillator, 8-bit binary counters set up as a variable frequency divider. I added slight reverb.

These sci-fi synth sweeps were created by manipulating white noise with filter sweeps and other effects and then using noise reduction to remove the underlying white noise. You would need to pick through them and cut them up, but they can be useful for sound designing light graphic elements that move around and animate on and off.

Playing around with the excellent tuner at http://websdr. Ewi. Utwente. Nl:8901/. The website even has a recording button! this version is the same as "shortwave-sweep-and-beeps. Wav" except here i have limited it with a threshold of 10db, which decreases dynamic range but also makes it louder overall.

Very strange sounds from a very high frequency.

Radio motorola.

This is a recording of myself sleeping, beginning ~ 1:00 am local time (~ 3hrs after going to bed) on january 10th, 2020 (which i later discovered was a full moon). I was in the midst of experimenting with recording myself all night long out of curiosity, using a laptop placed near the head of my bed. This particular recording was the only anomalous one (the rest consisting mostly of just breathing or snoring with occasional sleep-talking). This ~2 hour recording has several interesting properties, which make it hard for me to believe that these sounds were actually going on while i was sleeping. On the other hand, i don't have a memory of editing this file if i did. Either way, i find it unsettling. I found the file in oct 2021 while organizing my samples. As far as i can remember, this is the original raw recording. On further inspection, i discovered that it has some additional peculiar properties that make it even harder to believe i could have made it without remembering doing so. The audio spans almost exactly 118min (7080s). There’s a frequency sweep with a cycle-length of 6480ms that repeats throughout the entire recording. Dividing the 118min by 6. 48min (60 cycles) results in 18 parts containing exactly 60 cycles and a remainder of 12 cycles. If you think you know the source of the strange sounds or if you've ever heard anything similar, please let me know in the comments or email me at storyofthelie@protonmail. Com. I collected the most interesting bits into this pack:https://freesound. Org/people/storyofthelie/packs/33653/. Approximate times of weird stuff:. 25min - stretched cough41min - voice & sounds45min - metal hit & voice47min - call response55min - door latch1hr 3min - portal1hr 7min - more portal1hr 11min - open portal1hr 20min - echo voice1hr 23min - echo voice, tones, portal1hr 36min - stomp into breathing1hr 51min - echo voice1hr 53min - cycle tone change into crazy.

Lofi radio sound recorded with 3 eur cheap radio unit. Recorded with tascam dr-22wl. ---in case you use any of my sounds, i will be happy to be informed, although it is not necessary. Recorded in 2018.

I made this as a strange wake-up alarm. I was wondering at what point i will wake-up? what frequency will break my dream and bring me back on earth?. Created using audacity.

High pitched tv frequency.

Example of producing a beat frequency - two seconds of 110hz tone, followed by two seconds of 118hz, to form an 8hz beat frequency. Sound generated using the go-sound golang programming library:https://github. Com/padster/go-sound. As part of the demonstration program:https://github. Com/padster/go-sound/blob/master/runthrough. Go.

I needed just a piece of the "spark(fm_tri-90_sin-110)" for my next song. This is that little snippet. Thanks.

Soft static hiss from the radio airwaves with a slight buzz in the sound.

High pitch sound.

Large high pitch.

Upward frequency sweep.

Sonido ritmico de sincopa alta con un tempo de 120.

Small synthesizer made in pure data.

A scanning sound for a scanning thing for in games, like a medbay scan.

5 second sine-wave (loop) generated in soundforge. 16 bit 44. 100 hz. Wav file. Part of a pack inspired by the "colundi everyone" poster. Free to use as you like.

The source of this sound is https://freesound. Org/people/doomyd/sounds/530580/ - a clean electric guitar open a string. This sound has been processed using the harmonic plus stochastical analysis of the sms-tools package https://github. Com/mtg/sms-tools with frequency scaling and frequency stretching, to give a metallic flange & 2 octave bend effect.

A low frequency hum that will work on pc speakers (at least it does on my pc). . - i made this sound because i needed a deep hum for a composition, but as it turned out my pc speakers cut off low frequencies. A quick googling taught me that this is common for many pc's, but also that there might be ways around it in terms of designing waves that the speakers can produce. And so, after playing around with audacity abit, i came up with this low frequency hum that works well for my purpose at least. - i hope it might help others with similar issues.

Constant flame burner, very low and large frequency specs, used to melt asphalt recorded at 48-16 with portable dat using schoeps ms ball, edited and decoded in stereo in pt.

Field recording,includes frequencies below 21. 4khz very detailed. Equipment behringer ecm 8000mxl genesis fet.

This kind of generates random values at a certain frequency. In this example, the frequency is 200hz. The algorithm for this noise was created two years ago by myself in c++, as an imitation of noise generators in supercollider 2.

Slow flip along a portion of the am radio band using an analog receiver. Static and some talk.

A glitchey riser.

This is a sound made in audacity with a high frequency square wave slowed down. I have a question about this effect that sounds like a robot saying ''uaiuai'' ¿which is the name of this effect?if someone knows the name, please comment.

A soft static hiss from somewhere on the radio dial.

This low rumble was first created to represent an airplane.

Flip across the am radio dial through a range with some high-pitched sing in the static (and intermittent indistinguishable voices).

2 oscilators. One panned to the left the other to the right. Random pitch lfo bent on different rate speeds. With a bit cusher set to a certain amount, and mix to give both the crush and the original.

A series of wok hits, lowered into water. Gives an acoustic sounding dizziness and frequency shift. Could be good for comic style animation or theatre.

Sonido echo para llamar atención ya que es disonante, como las uñas sobre un tablero.

Spooky ∴ ambient ∔ drone.

Static with a sort of jackhammer pace at 107. 9 on the fm side of the radio dial. Recorded from a digital tuner, with a quick flip to 87. 5 fm then back to the 107. 9 static. Definitely qualifies as noise.

A close recording of a ringing ride cymbal. Useful as a drone or feedback-like ringing. All my sounds are fully free to use, but please consider leaving a comment to let me know how you'll be using them. Just curious! :).

3 recordings of various rfis made by refreshing the radio signal on myphone and putting it close to my microphone. First sound however, was coming from my electric piano, because my phone was on top of it.

This sound is an audio file that slowly breaks up the further it is played. I recorded this with an in-built microphone, no idea what make though. I recorded this on audacity, and added gradual distortion. Warning: you may need to turn down the volume for the last 6 seconds!.

A very high pitch noise from ddlc.

Just radio empty frequency.

Just radio empty frequency.

Just radio empty frequency.

I legit took this guy sound and edited https://freesound. Org/people/klangmaler_lutz/sounds/459795/give all credit to him.

This kind of noise randomly generates the values -1 or +1 at a given rate per second. This number is the frequency. In this example the frequency is 100 hz. The algorithm for this noise was created two years ago by myself in c++, as an imitation of noise generators in supercollider 2.

This kind of noise generates sinusoidally interpolated random values at a certain frequency. In this example the frequency is 100hz. The algorithm for this noise was created two years ago by myself in c++, as an imitation of noise generators in supercollider 2.

Recorded in a tram in tokyo. I didn't use high-pass filter when recorded, so i think you can hear much low frequency. Sennheiser mkh20 and fostex fr-2.

Static from a radio station wireless remote.

The interference produced at the low (left) end of the radio dial on a jambox set up close to a dvd burner while in operation. Sound rises and falls as the burner writes to disc.