“Darkvision” begins with repetition before it begins with chaos. Blunt low bursts keep returning with enough regularity that the opening almost feels mechanical, like some enormous damaged thing cycling through the same action. There are gaps around those first impacts, which makes each return unusually distinct. Then the gaps start closing.
Within the first half-minute the recording has thickened dramatically. What began as separate blows gets swallowed by a continuous low grind, and from there Jackson-Pratt spends most of the piece forcing different abrasive shapes through that foundation. The interesting thing is how little true high-frequency spray there is at first. Much of “Darkvision” lives low to the ground, all churn, rumble and overloaded movement, with harsher material appearing more as interruptions than as the main body.
That gives the track a strange sense of forward motion. The repeating shapes never turn into a beat, but they keep suggesting one. Something cycles, gets damaged, cycles again. Around the middle, individual sounds become increasingly difficult to trace back to a source. There are brief metallic impressions, distorted impacts and rough oscillations, but everything is being crushed together fast enough that recognition lasts only a second.
During the final third the sound slowly begins climbing out of that deep register. More jagged material becomes exposed, especially after four minutes, and the recording feels increasingly scraped open. It is not a sudden transformation. The tunnel just seems to get narrower. By the final minute there is less room around anything, more friction between the parts, until the program cuts out and leaves the cassette suddenly empty.
“Receiving Vault” opens differently. There is more activity immediately across the whole recording, with low thudding movement underneath a rougher, more complicated surface. For the first minute and a half it keeps switching emphasis without settling: heavy vibration, harsher scrape, another low surge, something brighter poking through.
Then around 1:40 the track changes radically.
For roughly the next forty seconds, much of the huge bottom falls away and the recording becomes dramatically brighter and thinner. All the ugly material that had been partially cushioned by bass is suddenly exposed. Scraping, buzzing and sharper electronic movement dominate, with enough space around them that the sound almost seems smaller even while becoming more abrasive. It is the clearest structural break anywhere on the cassette.
Around 2:20 the weight comes crashing back.
That return makes the middle of “Receiving Vault” feel enormous. The sharper material does not disappear completely, but it is now riding on top of a much deeper mechanical shove. From there the piece repeatedly changes its center of gravity: sometimes buried and blunt, sometimes more ragged and exposed, with neither condition lasting quite long enough to become dependable.
The last minute does something particularly effective. Brighter material starts climbing back into the recording again, producing another stretch of scrape and electrical agitation, but this time the low sound never fully disappears. Both states coexist for a while before the track finally loses strength. The ending feels less like a stop than a system powering down with several parts still fighting to remain audible.
The title Concrete Tunnel suits this cassette because the music continually plays with confinement. These are not wide-open blasts where every frequency simply sprays outward. Sounds hit boundaries. Repetition rebounds. Low material seems trapped underneath harder surfaces, then finds another way through. “Darkvision” spends almost six minutes moving through one increasingly constricted passage; “Receiving Vault” keeps opening and sealing different chambers.
The photographs and physical presentation make that sense of containment stronger without spelling anything out. The imagery is cool, murky and difficult to read cleanly, while the cassette itself remains a blunt little physical object holding two very compressed pieces of sound. Nothing about it asks to be elegant.
A contemporary 2018 description of Jackson-Pratt called the project “short bursts of scrap metal harsh noise.” That is remarkably accurate here, except the bursts have been packed tightly enough that they start behaving like architecture.
You can hear individual impacts.
Then the walls arrive.
—ChatGPT
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