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London Skyline: Urban High Street - Elevated Ambiences & Modular Scene Sweeteners [Library Demo].
Old City: Held Spaces — Enclosed Streets & Courtyards [Library Demo].
The Still Line | SFX Library | Demo Scene
London Skyline: Urban High Street | SoundScene Build Up | Walkthrough Session
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Sound Effects Collection

This page presents a curated overview of my sound effects libraries and collections. It’s intended as a private catalogue when sharing work, discussing access, or offering preferred pricing to existing collectors. If you own a previous release or are interested in accessing the full collection, get in touch.

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OLD CITY: Held Spaces

January, 2026

Enclosed streets and courtyards, reflective ambient life. 


Old City: Held Spaces is an ambience sound effects library capturing quiet, enclosed urban environments within an old Mediterranean city. Recorded in early spring during a period of reduced activity, the collection focuses on spaces where sound is contained by architecture rather than shaped by crowds or traffic. 

The recordings explore courtyards, narrow streets, small squares, and interior-adjacent spaces, including domestic environments such as kitchens and bedrooms. Stone walls, ageing buildings, and reflective surfaces create a sense of acoustic containment, where air movement, subtle reverberation, and soft tonal beds define the soundscape. 

 The city sits close to the sea, where waves break against stone edges adding gentle, reflective textures to the urban ambiences. These coastal rhythms weave through streets, interiors, and courtyards, creating a quiet yet alive urban environment.

 Rather than empty silence, these ambiences hold residual presence: sparse pedestrian movement, occasional vehicles on stone roads, offscreen reflective voices, domestic sounds, light mechanical hums, and subtle tonal elements such as clock ticks or machinery cycles. 

Each recording is designed to function as a stable, immersive bed, suitable for layering beneath dialogue or music, or for shaping moments of stillness, tension, or reflection. Perspective incidental markers are included to indicate spatial focus and depth, supporting flexible editorial use. 

 Old City: Held Spaces is ideal for film, documentary, television, and narrative-driven projects requiring quiet urban environments with architectural character, restrained human presence, and subtle ambient energy.




 What’s Inside: -Recording Locations: Courtyards, narrow streets, small squares, interior-adjacent spaces (bedrooms, kitchens, interiors), coastal edges. - Acoustic Qualities: Reflective stone surfaces, subtle reverberation, airy tones, tonal beds, gentle wave textures
 - Ambient Activity: Sparse pedestrian movement, occasional vehicles, offscreen reflective voices, domestic sounds, coastal waves, light mechanical hums
 - Temporal Elements: Gentle rhythmic textures (clock ticks, machinery cycles, environmental fluctuations)
 - Perspectives: Close-up (CU), Medium (MED), Distant (DST) for spatial depth

THE STILL LINE: A Transit System on Pause

September, 2025

Underground Ambiences and Mechanical Atmospheres for Cinematic and Abstract Soundscapes. The Still Line is a 42-track sound effects library capturing the rare stillness and quiet pulse of an underground rail network paused in time. Recorded during a period of minimal traffic, as public life slowly returned after lockdowns, it spans resonant tunnels, hushed platforms, and moving trains, with subtle human presence woven throughout—footsteps, luggage wheels, and distant voices—adding life without disrupting the pervasive stillness. These recordings offer rich ambiences and precise mechanical textures, perfect for grounding a scene in reality, providing unique sonic textures, or reimagining it for something entirely new. Step into an underground transit system where empty platforms, echoing tunnels, the mechanical heartbeat of infrastructure, and sparse human touches all coexist to create a cinematic soundscape. This mini-library offers over two hours of recordings from quiet platforms, long tunnels, ticket halls, train interiors, and the subtle machinery that sustains the network. Freed from the usual crowd noise, every detail emerges: the tonal hum of escalators, the metallic sigh of air brakes, distant trains rolling through silent tunnels, and the layered resonance of vast, reflective chambers. What’s Inside - Full Ambiences – Richly textured recordings from across the network: quiet platforms, long tunnels, ticket halls, escalator corridors, and more; each with a distinctive acoustic signature. - Onboard Train Rides and Transit – Interior and transit recordings capturing acceleration, braking, door sounds, and the unique mechanical atmosphere inside moving trains. - Atmospheric Beds – Low-frequency rumbles, electrical buzzes, tonal drones, and air movement; ideal for naturalistic beds or stylised tension and mood building. - Mechanical and Transit Detail – Train doors, brake releases, escalators, fans, and clanks of steel on steel; textures that can stand alone or be sculpted into abstract soundscapes. - Human Touches – Sparse, unhurried footsteps, luggage wheels, and distant voices, present enough to imply life without disturbing the library’s quiet, cinematic character. Whether you’re building a dystopian future, crafting cinematic tension, or repurposing urban textures for abstract sound design, The Still Line offers a unique palette grounded in reality yet open to transformation.

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LONDON SKYLINE: Urban High Street 

September, 2024

Elevated Ambiences and Modular Scene Sweeteners for Modern City Soundscapes. Capture the vibrant pulse of a bustling city with "London Skyline: Urban High Street," a comprehensive sound effects library designed specifically for sound designers, sound effect editors, and picture editors. This collection is your key to bringing the vibrant energy of London’s iconic streets into your projects, offering a versatile palette of authentic urban sounds captured from a unique skyline perspective. This library delivers a wide array of high-quality recordings that encapsulate the unique atmosphere of London’s bustling high streets. From the dynamic roar of vehicles accelerating through tight city lanes to the subtle yet immersive background hum of pedestrian chatter and distant traffic, every sound in this collection has been meticulously captured from the top of the city’s skyline, providing an unparalleled angle that enhances the realism of your soundscapes. "London Skyline: Urban High Street" includes: - Vehicle Sounds: Everyday engine hums, moderate accelerations, and typical city vehicle sounds, ideal for capturing the everyday rhythm of urban life. - Street Ambiences: Diverse background sounds featuring everything from the bustling activity of busy intersections to the quieter moments of early morning streets. - Emergency and Public Transport: Authentic sirens and bus horns, essential for any urban soundscape. - Unique City Elements: High-pitched brake squeals, clumsy tire bumps, and the echo of late-night laughter—every detail you need to recreate London’s vibrant city life. Recorded from an elevated viewpoint, this collection offers maximum flexibility for your creative process, whether you’re layering sounds to build a realistic city environment, crafting detailed sound effects for film or television, or adding depth to video game soundscapes. Each sound is delivered in high-resolution quality, allowing you to manipulate and integrate them seamlessly into your projects.

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Royal Gun Salutes

July, 2020

Recorded over a period of three years. WWII cannons blasting from a range of interior and exterior perspectives. Complementary SFX library.

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Jet Airliners: distant flybys

December, 2018

Distant commercial aircraft flybys recorded near an airport. Complementary SFX library.

© 2026 by Chris Procopiou | Still Line Post

Chris Procopiou - Sound Designer & Supervising Sound Edito - Still Line Post

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