99Sounds Releases FREE Underground Sounds By Marcel Gnauk


99Sounds has released Underground Sounds, a free collection of field recordings created by Marcel Gnauk of Free To Use Sounds.

Underground Sounds contains 1.81 GB of royalty-free audio content. The included sounds were captured with two rather unusual recording devices: a geophone and a hydrophone. The first one is normally used to record seismic activity (aka earthquake sounds), and the other is used for recording sound underwater.

See also: 99Sounds Releases FREE World Sounds Library By Marcel Gnauk

Marcel captured these field recordings in Iceland while visiting various locations. There’s tons of interesting stuff waiting to be discovered in Underground Sounds, from the soothing sounds of rain in a car interior to some eerie sound effects captured with the geophone. All included content is royalty-free. You can use these sounds as-is or process them to create new and unique sound effects.

Our regular readers are probably familiar with Marcel’s work. Marcel and his girlfriend Libby are the people behind Free To Use Sounds, a great website that lets you download tons of high-quality field recordings and sound effects at a very low price.

Special Discount

We teamed up with Marcel to offer a special discount code for Bedroom Producers Blog readers and 99Sounds visitors. You can get the full Free To Use Sounds discography for just $16CLICK HERE TO LEARN HOW.

That’s only $16 for over 550 GB of sounds – an epic deal! Read more about this exclusive offer in our Free To Use Sounds article.

99Sounds Underground Sounds

You can download Underground Sounds completely free of charge from 99Sounds. While you’re there, check out the other free libraries for more royalty-free sound effects.

More info: Underground Sounds (1.81 GB download size, ZIP archive, contains 33 field recordings in 24-bit WAV format)

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About Author

Tomislav is a music producer and sound designer from Belgrade, Serbia. He is also the founder and editor-in-chief at Bedroom Producers Blog.


  1. Nice one, top stuff from 99sounds! Look forward to checking these unusual sounds out. Big up to Marcel and Libby for the generous offering.

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