Guess What Makes This Mysterious Monster Sound - And Win!

Update: The source of the monster sounds has now been revealed – more info here
Sometimes, really cool sounds await in unexpected places. And that’s exactly the case with a new SFX library I just heard. Below is an example (with a bit of sweetening / processing) from the upcoming library.

Can you guess the primary sound source used to create these underwater monster sounds?

Think you know the answer?
Just submit your answer (1 per person) below, for your chance to win the full monster library + two other interesting SFX libraries. The winner is drawn at random from the correct answers this Friday.

Looking forward to hearing your guesses – and good luck!

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- a few highlights:

Cinematic & Trailer Sound Effects Magic – Alchemy Play Track 4213 sounds included ~~From: $135~~ From: $108

SONIC SPELLS WITH REAL PERSONALITY

MAGIC – ALCHEMY is a professional sound effects library built from real chemical reactions and elemental forces. It delivers short, character-rich magic sound effects perfect for spellcasting, magical UI design, and fantasy storytelling. Designed to sit cleanly in a mix and shimmer with personality, these spell sounds are ideal for games, trailers, audio dramas and more. Real reactions, recorded with obsessive detail.

Magic Sounds from Real Chemical Reactions

No digital fakery here. Every sound in MAGIC – ALCHEMY began as a live experiment — alcohol burning in jars, butane growling through pipes, fuses igniting, water swirling in glass. These are true-to-life textures, captured in a lab-grade recording setup. The result? Magical sound with depth, realism, and spark..

Short, Sharp, and Ready to Use

These are not long, cinematic flourishes. This library is about immediacy — short, dry, punchy magic effects that are easy to slot into your project. Ideal for game asset design, magical feedback sounds, and trailer moments where clarity counts.

Three Spell Flavours: Holy, Cursed, Neutral

Need a healing chime, a cursed hex, or something more ambiguous? The Designed section is grouped into Holy, Cursed, and Neutral categories — giving you emotional options that match your scene’s intent, whether you’re crafting a fantasy RPG or a subtle magical interaction.

Built for Professionals, Whatever You Create

Whether you’re layering magic for a fantasy film, adding interactive audio to a mobile game, or creating rich textures for audiobooks or theatre, MAGIC – ALCHEMY fits right in. It’s mix-ready, flexible, and full of sonic character.

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Hum, Buzz & Glitch Sound Effects Audio For Testing Play Track 137 sounds included $1

Audio files for testing speakers and sound systems. These include Noises (Brown, White, Pink, Black/Silence), DTMF, Panning (50%, 100% Left, Right, Centre), Sines (20Hz-20KHz), Oscillator Sweeps (1-24000Hz)

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Foley Sound Effects Grenade Foley Play Track 1374 sounds included $15

A focused collection of grenade foley, captured with precision using replica units. This library provides the essential, clean sounds of tactical handling, interaction, and impacts.

Recorded at 96kHz/24-bit across various surfaces including steel plates, carpet, wood floorings, soil, and grass, this library offers variation for different environments. The recordings feature grenade shakes, surface impacts and rolls, pin pulls, spoon lever ejections, spoon drops, and tactical gear foley, all captured with Lewitt LCT 540 S and Shure SM7B.

This is a practical toolkit for sound designers working in film, games, and other media, providing a tonal and versatile foundation for building realistic military action.

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