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Field & Spaces - Outdoor Impulse Responses
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Field & Spaces - Outdoor Impulse Responses

Field & Spaces - Outdoor Impulse Responses

THE PERFECT IMMERSION IN HUGE AND COMPLEX OUTDOOR SPACESBoom Library
$289.00
+ applicable tax (VAT) depends on country/region

BOOM Library

Fields & Spaces

Outdoor Impulse Responses

Canyons, forests, hills and mountains; bridges, squares, streets, alleys, ports, courtyards, dams, castles and underpasses — modelled rather than recorded.

123Impulse responses
3Editions
12.1 GBAmbisonic set
24 bit48 to 96 kHz
+And more

Canyons●Forests●Hills●Mountains●Bridges●Squares●Alleys●Courtyards●Castles●& more

123 impulse responsesStereo, surround, ambisonicWindows and Mac

Nothing here was recorded outdoors. It was modelled.

The field gives the reason plainly: a real outdoor impulse response needs a source loud enough to excite a canyon and weather that will hold still while you use it. After two years of studying how sound behaves on different surfaces, in the supplier’s own words, the reflections were modelled instead — which is also why the copy says no recording noise came with them.

At a Glance

  • 123 impulse responses The same figure in all three editions — stereo, surround and ambisonic carry the same set at three widths
  • Four natural settings named Canyons, forests, hills and mountains, and the field closes the list with “and more”, so four is what is named rather than what is in there
  • Nine urban settings named Bridges, squares, streets, alleys, ports, courtyards, dams, castles and underpasses — also closed with “and more”
  • 1.2 GB across 123 IRs About 9.8 MB per impulse response in the stereo edition — the division is computed here
  • Distance varies with place A medium canyon at 0, 30, 40 and 70 meters; a long alley at 0, 70 and 120; a forest pit at 0 and 10. Four points, three and two — counted off the field’s three worked examples
  • Stereo is a fold-down The field states it: the stereo set is a mix-down of the ambisonic version, and it credits that for the density of the tails

Content & Detail

01What Is In Itthree editions, one set of 123▾
Stereo123 impulse responses, 1.2 GB
Surround123 impulse responses, 7 GB — the field says this pack carries them in stereo and in quad surround
Ambisonic123 impulse responses, 12.1 GB — the field says this pack also includes the surround and stereo packs
What the nesting leaves12.1 less the 7 GB it contains leaves about 5.1 GB of ambisonic files; 7 less 1.2 leaves about 5.8 GB of surround. Both subtractions computed here
Per impulse responseAbout 9.8 MB in stereo, about 47 MB in surround and about 41 MB in ambisonic — three divisions, all computed here from the stated sizes
Format24 bit, 48 to 96 kHz, WAV, Windows and Mac
The count, twiceThe spec tables say 123; the prose says over 120. Both are the supplier’s own, and the page carries the exact figure
The name, twiceThe prose writes FIELDS & SPACES; the product record writes Field & Spaces. Neither is corrected here
02What The Field Namesfour natural, nine urban, three worked examples▾
Canyons, forests, hills, mountainsFour natural settings, and the field’s own “and more” keeps the list open
Nine urban settingsBridges, squares, streets, alleys, ports, courtyards, dams, castles and underpasses — nine named, list open
Castles and damsBoth filed under urban by the field, beside streets and alleys. Named here rather than quietly moved to the natural column
Two axes, no countsThe field says the natural IRs vary by ground material as well as by distance. It names both axes and counts neither, and neither is counted here
The hardest fourHuge canyons, snow-covered hills, grassy fields and narrow city streets — the four the field gives as the reason for modelling in the first place
Why modellingThe field calls an accurate outdoor IR nearly impossible to record: it would want a gigantic sound source and perfect weather. So the reflections were modelled instead, and the field credits that for the absence of a recorded noise floor
What ambisonic is forVirtual and augmented reality and 360° film, in the field’s own words

An impulse response is a space answering one question. Outdoors there is no room to answer — only ground, distance and whatever happens to stand in the way — which is why this set is organised by distance as much as by place, and why a forest pit gets two measuring points where a canyon gets four.