Released: 28.8.2025, 11:25 -- Updated: 24.10.2025, 18:48

Happotesti 2 ~ 22.11.2025, 22:00

Upcoming event: Happotesti 2 22.11.2025, 22:00 Upcoming event: Happotesti 2 22.11.2025, 22:00

The experiment resumes. This time, the focus shifts to sports science — a study of endurance, rhythm, and the breaking point between control and collapse. Expect athletic precision, lactic acid tension, and sounds straight from the lab floor.

On two stages, seasoned lab masters from the UK and Germany as well as local artists will help you reaching new limits with high energy Acid techno and guide your recovery cycles through chill cooldown tunes. Aided by the energizing sounds of the 303, let us awaken the athlete inside you — just make sure your lactic acid stays in check.

The space will transform into a research facility for body and senses, with contributions from test subjects, DJs, VJs, and installation artists interpreting the theme through their own experiments.

⚠️ RATA: high-intensity interval training sets, exploring the limits of acid techno.

💧 LEPO: the cooldown zone, where tempo slows and sound drifts toward experimental recovery states.

LOCATION: Helsinki area UG, easy metro access
TIME: 22 - 7

In the previous acid test, we found anomalies. Now we’re back to study them.

Lineup

Mobile Dogwash (UK) - SACID (DE)

closedeyevisyals - controfaces - Folded Visuals - Hagakure - Happoteknohaltija - Indigo - Monsieur Boum Boum - pästöl - Ruttuvaari - Tenaladyboy - Titus Flavius - Tom Coq - Ton 303 - Varaktor - VJ DIN-AVI

 

Tickets

PRESALE: 

Early Bird: 15€ SOLD OUT
Regular: 20€
Support Tickets: 30€

Tickets at the door: 25€  -  Admission at the door is not guaranteed and depends on the current capacity of the venue.

Artist Contribution

We’re still inviting installation artists to join the test. Visuals, and setups that fit the vibe — athletic, scientific, a bit unhinged. Maybe it’s acid experiments, projection data gone wrong, or something we can’t quite define yet.

Create an artist profile for the work and apply from the button below by 9.11. evening! You can also send us your application via email to hallitus[ät]entropy.fi

Volunteering

Happotesti runs entirely on volunteer contributions. Join the crew and help us make it happen! Choosing multiple shifts can grant you free access to the party and some refreshments — find out the details in the volunteer signup. Log in (or register) to see the "Nakkikone" button below and choose your shifts.


DJ Artists @ LEPO

Hagakure [葉隱]

ambient set
"Hagakure" is an ancient term representing the spiritual guide of samurais. Its meaning, "Hidden by the leaves", unveils a mystic state of introspection and timeless meditation. So does Hagakure's signature sound, which focuses on creating a syncopated and rhythmic atmosphere to bring the audience to a rhythmic journey of self-awareness.

Mixcloud | All mixes
Hagakure [葉隱] Hagakure [葉隱]
Hagakure [葉隱]
"Hagakure" is an ancient term representing the spiritual guide of samurais. Its meaning, "Hidden by the leaves", unveils a mystic state of introspection and timeless meditation. So does Hagakure's signature sound, which focuses on creating a syncopated and rhythmic atmosphere to bring the audience to a rhythmic journey of self-awareness.

Ruttuvaari Ruttuvaari
Ruttuvaari

Ruttuvaari

Ambient, ambient techno, experimental,
Ruttuvaari forgot his name and trekked through Boomin Valley to find the chill out zone
Ruttuvaari forgot his name and trekked through Boomin Valley to find the chill out zone

Tom Coq

Chill Synthwave, Ambient, IDM
I'm gonna play chill Synthwave that sometimes diverts to ambient and IDM. Ethereal sounds will central part of this set.
Tom Coq Tom Coq
Tom Coq
I'm gonna play chill Synthwave that sometimes diverts to ambient and IDM. Ethereal sounds will central part of this set.

Titus Flavius Titus Flavius
Titus Flavius

Titus Flavius

Melodic Techno, Organic House
I love to merge harmonies and instrumentation of classical music with techno and deep house beats - music for the dance floor, raves and the living room. I love to perform my music with a live setup, but also enjoy DJing! Looking forward to the entropy events!

Youtube Sets | Instagram | Spotify
I love to merge harmonies and instrumentation of classical music with techno and deep house beats - music for the dance floor, raves and the living room. I love to perform my music with a live setup, but also enjoy DJing! Looking forward to the entropy events!

controfaces

acid dub and wobbles
Always on a quest for the next sound to obsess over, she jumps from genre to genre the way her mind leaps from serenity to excitement. Her love for music recommendations and community efforts has brought her here. What’s next is unknown... let her first finish reading this academic paper on reverbs

dub mix | all mixes
controfaces controfaces
controfaces
Always on a quest for the next sound to obsess over, she jumps from genre to genre the way her mind leaps from serenity to excitement. Her love for music recommendations and community efforts has brought her here. What’s next is unknown... let her first finish reading this academic paper on reverbs

DJ Artists @ RATA

Ton 303

London aciiiiid, Acid techno, acid trance
This is my recipe for the smiley face
During the first phase we explore some traditional 2000’s london acid sound, from which we increase the bpm with acid trance-ish influences.
Until we flow towards the last drill, the hydraulic press of the sharpest, fastest and sourest acidic drops of the modern era of 303 – combined with the tight ever-goosebumping classics.
Ton 303 Ton 303
Ton 303
This is my recipe for the smiley face
During the first phase we explore some traditional 2000’s london acid sound, from which we increase the bpm with acid trance-ish influences.
Until we flow towards the last drill, the hydraulic press of the sharpest, fastest and sourest acidic drops of the modern era of 303 – combined with the tight ever-goosebumping classics.

Monsieur Boum Boum Monsieur Boum Boum
Monsieur Boum Boum

Monsieur Boum Boum

DISCO ACID TRANCE techno RAVE
If we were in the tropics, the sun would be rising. Luckily we’re in Finland and what we need is more bass. If you like your head going boom boom and your feet going tchick tchack AND you are still awake be prepared for a non-vomitive electro roller coaster that could only be described as: yes.
If we were in the tropics, the sun would be rising. Luckily we’re in Finland and what we need is more bass. If you like your head going boom boom and your feet going tchick tchack AND you are still awake be prepared for a non-vomitive electro roller coaster that could only be described as: yes.

Mobile Dogwash

Northern Monkey Acid
Bringing you fat rolling acid techno from the north of the UK, Mobile Dogwash has been rocking the dance floor with his storming 303 driven sound since 1997.
Shortly after starting producing acid techno, he earned himself a resident slot at the legendary Headcharge, the club responsible for playing the north’s most banging techno. Six years after the project started, he collaborated with The Pranksterz, earning him his first release on Acid Test. Since then, Mobile Dogwash has had releases on some of techno’s most reputable labels, with more coming in the next months.
Not the lone star that some DJs tend to be, Mobile Dogwash has regular company in the studio in varying forms; Ron Atomizer, Dave Atomizer, Si McLean, Pablo Sonic Terrorist, Benji303, Fabulous 23s and OB1, plus future collaborations planned with Steve Mills, Tassid and Tik Tok. Watch out for upcoming releases with Dynamic Intervention, The Geezer, Sterling Moss, Mark Eg and Dave Atomize, MK303, Ron, Dave & Si.

Soundcloud | Bandcamp
Mobile Dogwash Mobile Dogwash
Mobile Dogwash
Bringing you fat rolling acid techno from the north of the UK, Mobile Dogwash has been rocking the dance floor with his storming 303 driven sound since 1997.
Shortly after starting producing acid techno, he earned himself a resident slot at the legendary Headcharge, the club responsible for playing the north’s most banging techno. Six years after the project started, he collaborated with The Pranksterz, earning him his first release on Acid Test. Since then, Mobile Dogwash has had releases on some of techno’s most reputable labels, with more coming in the next months.
Not the lone star that some DJs tend to be, Mobile Dogwash has regular company in the studio in varying forms; Ron Atomizer, Dave Atomizer, Si McLean, Pablo Sonic Terrorist, Benji303, Fabulous 23s and OB1, plus future collaborations planned with Steve Mills, Tassid and Tik Tok. Watch out for upcoming releases with Dynamic Intervention, The Geezer, Sterling Moss, Mark Eg and Dave Atomize, MK303, Ron, Dave & Si.

SACID SACID
SACID

SACID

somewhere between techno/acid/trance && tek
SACID is a young DJ from Bavaria, living in Berlin for several years where she fell in love with the techno scene. She loves to show her energy through a combination of very well picked tracks and hard twists. Not only her bouncy selection of modern hits but also her passion for well placed classics will amaze you from start to end in every set.

Soundcloud | Resident Advisor | Instagram
SACID is a young DJ from Bavaria, living in Berlin for several years where she fell in love with the techno scene. She loves to show her energy through a combination of very well picked tracks and hard twists. Not only her bouncy selection of modern hits but also her passion for well placed classics will amaze you from start to end in every set.

Happoteknohaltija

Happotekno
Miksu is non-binary, autistic, an Entropy active and all kinds of other fun things. Happoteknohaltija is his artist alias, that as the name could give away, focuses mainly on acid techno. On the stage expect all kinds of tomfoolery, sillyness and unexpected things, while musically focusing on skillful mixing, high energy and sound pressure levels.

Prepare for a transcendental experience, where an authentic elf takes you on a journey to the lowest levels of the pH scale.

SoundCloud | Website | YouTube
Happoteknohaltija Happoteknohaltija
Happoteknohaltija
Miksu is non-binary, autistic, an Entropy active and all kinds of other fun things. Happoteknohaltija is his artist alias, that as the name could give away, focuses mainly on acid techno. On the stage expect all kinds of tomfoolery, sillyness and unexpected things, while musically focusing on skillful mixing, high energy and sound pressure levels.

Prepare for a transcendental experience, where an authentic elf takes you on a journey to the lowest levels of the pH scale.

Varaktor Varaktor
Varaktor

Varaktor

Techno, acid
Techno with low pH and high SPL

Varaktor | Station 303
Techno with low pH and high SPL

VJ Artists @ RATA

closedeyevisyals

demoscene, glitch, esoteric, intense
Demoscene-based procedural visuals and mindbending glitchy esoteric BlenderRenders

2019 Assembly VJ set
closedeyevisyals closedeyevisyals
closedeyevisyals
Demoscene-based procedural visuals and mindbending glitchy esoteric BlenderRenders

pästöl pästöl
pästöl

pästöl

Whatever fits the vibe
Always learning new things and exploring new aesthetics. No fixed style, just curiosity and lights in motion.

VJ demo
Always learning new things and exploring new aesthetics. No fixed style, just curiosity and lights in motion.

Ĭ̷̺̲͖̱̎̆̄͑̿̓̚n̶̼͉̗̘̜̩̻̉̊̐d̸̟͍̟͕̬͎̆̂ȋ̸̪͓̯͉̻̊̌̿̌̏͊̏g̴̨̤̯̱̬̫̼̦̦̣͂̊͂͛ơ̷̧̬̙̩̰̱̠͖̊̑͝

. . . .
Indigo is a VJ, video artist, DJ and music producer from Helsinki. The shared journey with Entropy has been long: it started with the Smultron outdoor raves in 1997, where Indigo played his first DJ sets. Respectively, Indigo considers the Entropy 20 years celebration at Ääniwalli in 2013 to be his first official VJ gig.

Every event and moment is unique and there is no formula for a successful gig. Indigo trusts in the power of flow and often sets out to build his visual set completely improvising.

Instagram | Vimeo
Ĭ̷̺̲͖̱̎̆̄͑̿̓̚n̶̼͉̗̘̜̩̻̉̊̐d̸̟͍̟͕̬͎̆̂ȋ̸̪͓̯͉̻̊̌̿̌̏͊̏g̴̨̤̯̱̬̫̼̦̦̣͂̊͂͛ơ̷̧̬̙̩̰̱̠͖̊̑͝ Ĭ̷̺̲͖̱̎̆̄͑̿̓̚n̶̼͉̗̘̜̩̻̉̊̐d̸̟͍̟͕̬͎̆̂ȋ̸̪͓̯͉̻̊̌̿̌̏͊̏g̴̨̤̯̱̬̫̼̦̦̣͂̊͂͛ơ̷̧̬̙̩̰̱̠͖̊̑͝
Ĭ̷̺̲͖̱̎̆̄͑̿̓̚n̶̼͉̗̘̜̩̻̉̊̐d̸̟͍̟͕̬͎̆̂ȋ̸̪͓̯͉̻̊̌̿̌̏͊̏g̴̨̤̯̱̬̫̼̦̦̣͂̊͂͛ơ̷̧̬̙̩̰̱̠͖̊̑͝
Indigo is a VJ, video artist, DJ and music producer from Helsinki. The shared journey with Entropy has been long: it started with the Smultron outdoor raves in 1997, where Indigo played his first DJ sets. Respectively, Indigo considers the Entropy 20 years celebration at Ääniwalli in 2013 to be his first official VJ gig.

Every event and moment is unique and there is no formula for a successful gig. Indigo trusts in the power of flow and often sets out to build his visual set completely improvising.

Folded Visuals Folded Visuals
Folded Visuals

Folded Visuals

Folded Visuals takes the viewer to a secret garden after dark.
Visions of lakes, ferns and soft moss blend into mysterious signals and a splash of circuit. Whispers and faraway wanders, restless dreams of a long lost drone.

A prominent VJ in the Helsinki club and underground scene since 2013, she has performed at festivals and events from Kazakhstan to Greenland.

For the Monochrome event, she will build an audio-reactive system that blasts monochromatic textures and abstract patterns.

@merlemoi | #foldedvisuals | merlekarp.com | Aavistus Festival
Folded Visuals takes the viewer to a secret garden after dark.
Visions of lakes, ferns and soft moss blend into mysterious signals and a splash of circuit. Whispers and faraway wanders, restless dreams of a long lost drone.

A prominent VJ in the Helsinki club and underground scene since 2013, she has performed at festivals and events from Kazakhstan to Greenland.

For the Monochrome event, she will build an audio-reactive system that blasts monochromatic textures and abstract patterns.

Tenaladyboy

pixels and stuff
Tenaladyboy has been involved in the music scene for the whole of the new millenia creating anything from chamber music to dreamy installations with lights. His latest ventures create novel type of reactive video art that has strong emphasis on 3d modeling. In the e30v, there will be loads of custom material, vfx and immersive experiences.

Instagram
Tenaladyboy Tenaladyboy
Tenaladyboy
Tenaladyboy has been involved in the music scene for the whole of the new millenia creating anything from chamber music to dreamy installations with lights. His latest ventures create novel type of reactive video art that has strong emphasis on 3d modeling. In the e30v, there will be loads of custom material, vfx and immersive experiences.

VJ DIN-AVI VJ DIN-AVI
VJ DIN-AVI

VJ DIN-AVI

VJ Dinavisk creates esoteric worlds by combining alchemical graphs and 3D-scanned digitalized ancient environments.

VJ Showreel
VJ Dinavisk creates esoteric worlds by combining alchemical graphs and 3D-scanned digitalized ancient environments.