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Home Sound Effects Diffuse City

Diffuse City


Diffuse City is the unique urban ambience sound effects library you didn’t know you were missing. It captures the urban environment in its many forms – all based around the idea of diffuse ambience.

The Diffuse City library is purpose-built for the times an environment needs to be felt, but not be distracting.

Every track in Diffuse City was recorded with some sort of real life “filter” in mind; be it distance, elevation, time of day, physical material – Anything to provide the feeling of city life with out the specificity of many urban ambience libraries. No distracting close car pass-bys or people talking; only great natural ambience beds.

Diffuse City was recorded in big cities, suburbs, small towns, and rural settings over a span of two years. It was largely recorded over very late nights, when very few people we’re around. Occasionally, however, a car would pass by… a gun would go off… While these were edited out of the recordings, they are included as “extras” in the library. Perfect for adding some flavor to a moment that’s authentic to the environment it was recorded in.

Metadata – and markers:

In addition to thorough metadata, each ambience in Diffuse City is embedded with markers highlighting unique moments that aren’t easily visible in a waveform. Software like Soundminer v4.5 and Reaper can display these markers, making it easy to identify distinct sonic moments in an otherwise nondescript waveform.


Markers in Reaper

There are 10 areas of focus in Diffuse City:

Elevated City • Distant Highways • Underground City • Distant City • Under Bridges • City Rumble • Empty Parking Lots • Alleys • Industrial • Window Contacts

Hear examples and learn more about each one below

Licensor: Collected Transients
Categories: , , , .
Type: City ambience sound effects / recordings
Specs: 116 files • 116+ sounds • 24 bit / 96 kHz + 24 bit / 48 kHz • 24.2 GB • Includes metadata
Approx. 752 minutes total
Instant - blazingly-fast - digital download
License type:
Royalty-free - you can select the number of users on checkout
Video Thumbnail


Individual categories:


Elevated City
City life from above. Spanning from 12 to 30 stories up, these ambience tracks provide the unmistakable feeling of elevation in the urban environment. The city was recorded from rooftops, balconies, and windows during both day and night.
(9 locations/80+ min/1 “Extra”)

Distant Highways
A great variety of distant interstates and highways. Covering sparse pass-bys to constant traffic. Locations up to a mile away from highways were specially picked to have minimal unwanted “close” sounds… only fast far away traffic.
(15 locations/160+ min/2 “Extras”)

The underbelly of the city. Nothing can quite match the deep rumbling of a city overhead, pulsing of fans, reverberant cars in the distance, or even far away yelling of the homeless. These are authentic recordings of the gritty and ominous atmosphere of the urban underground.
(8 locations/65+ min/8 “Extras”)

Distant City
Cities in the distance have an aura that’s quite difficult to capture on its own. Diffuse city offers just that: the humming drone of distant city life. Perfect for that “outskirts of the city” sound.
(9 locations/80+ min/6 “Extras”)

Under Bridges
Bellowing bridges from below. Mics were placed under interstates, highways, and other roads in places that may or may not have been legal. The result: massive rumbling tones and impacts from short bridges to entire raised interstates.
(12 locations/105+ min/1 “Extra”)

City Rumble
The perfect city base. Rumbling of urban environments with no specific traffic. Cities were recorded from their core extremely late at night, when almost no one was out driving around. Without the traffic, what’s left is the natural resonant rumble of the urban background.
(11 locations/90+ min/11 “Extras”)

Empty Parking Lots
The sounds of deserted parking lots. A combination of wind-blown debris, buzzing lights, and humming transformers embody the feeling a wide open parking lot.
(5 locations/45+ min/2 “Extras”)

Urban alleys. Residential and downtown areas. Humming air conditioners and hissing gas lines permeate the city’s rumble in narrow alleyways.
(4 locations/25+ min/2 “Extras”)

A distant airport, train yard, factory… a nice collection of diffuse industrial ambience.
(5 locations/55+ min/1 “Extra”)

Window Contact
City ambience… as heard via glass. The resonance of windows provides a very unique perspective of the urban environment. While intended for design, it could also be used for city bleed into an interior environment.
(3 locations/25+ min/1 “Extra”)


Full sound effects list for Diffuse City:

View sound list

Download [264.80 KB]


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Collected Transients are home-grown sound effects libraries by Stosh Tuszynski, a sound designer based in Chicago, IL.

Each library from Collected Transients is 100% originally recorded/designed material. All files are embedded with rich Soundminer, Basehead, BWF, and iXML Metadata for easy searching across all popular audio database software.


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