KaterCast 56 kommt diesmal von Martin Ka in der Kiosk Edition !!!
Enjoy !!!
download is enabled!

SoundCloud: https://soundcloud.com/martin_ka
FaceBook: https://www.facebook.com/Martinkamusic
Instagram: https://www.instagram.com/martinkamusic/
Beatport: https://www.beatport.com/artist/martin-ka/754986

KaterBlau

KaterCast 56 - Martin Ka - Kiosk Edition

KaterCast 57 kommt diesmal von Kleintierschaukel in der Acidbogen Edition !!!
Enjoy !!!

SoundCloud: https://soundcloud.com/kleintierschaukel
FaceBook: https://www.facebook.com/kleintierschaukel
Instagram: https://www.instagram.com/kleintierschaukel/
Beatport: https://www.beatport.com/artist/kleintierschaukel/479534

KaterCast 57 - Kleintierschaukel - Acidbogen Edition

"Lotti"
Dogs sleep while dreaming and dream while sleeping.
That’s not unusual.
But the dog lady Lotti talks loudly in her sleep.
She shares with us and plays the synthesizer with her left paw.

Follow @mytripismytrip // @ju_nixe // @kioskid

➟ Bandcamp: kioskid.bandcamp.com

Troja Tapes

Bandcamp

Premiere: mytripismytrip & Nixe - Lotti [Kiosk I.D.]

KaterCast 62 kommt diesmal von Shepherd in der Acid Hopper Edition !!!
Enjoy !!!

SoundCloud: https://soundcloud.com/shepherd_music
FaceBook: https://www.facebook.com/shepherdmusic
Instagram: https://www.instagram.com/shepherd_berlin/

KaterCast 62 - Shepherd - Acid Hopper Edition

KaterCast 63 kommt diesmal von Etzo in der Heinz Hopper Edition !!!
Enjoy !!!
This recording was made during our Party on June25 2022 "Piñate at KaterBlau w/Bahnwaerter Thiel" at Heinz Hopper!

SoundCloud: https://soundcloud.com/etzo_music
FaceBook: https://www.facebook.com/etzo.music
Instagram: https://www.instagram.com/etzo_music/

Katercast 63 - Etzo - Heinz Hopper Edition

KaterCast 64 kommt diesmal von miAs in der Katergeburtstags Spezial Edition !!!
Enjoy !!!

SoundCloud: https://soundcloud.com/mias-welt
FaceBook: https://www.facebook.com/profile.php?id=100064418600550
Instagram: https://www.instagram.com/mias_katerblau/

KaterCast 64 - miAs - Katergeburtstags Spezial Edition

KaterCast 66 kommt diesmal von Mona Moore in der Heinz Hopper Edition !!!
Enjoy !!!

SoundCloud: @monamoore
FaceBook: www.facebook.com/mona.moore.16
Instagram: www.instagram.com/monamoore.berlin/
Beatport: https://www.beatport.com/artist/mona-moore-ger/999681

KaterCast 66 - Mona Moore - Heinz Hopper Edition

KaterCast 67 kommt diesmal von Tante Emma in der Harter Kater Edition !!!
Enjoy !!!

SoundCloud: https://soundcloud.com/tanteemmamusic
LinkTree: https://linktr.ee/tanteemmamusic
Instagram: https://www.instagram.com/tanteemmamusic/

17. - 19. Dezember @ Kater Blau
SAMSTAG 22:00 - 06:00
 HARTER KATER
HoudaFK
Tante Emma
Fidelity Kastrow
_______________________
SAMSTAG 22:00
Soela
Océane
Ramy Hasnawe
Marco Mesem
Katsuya Sano
Marcus Meinhardt
Kenji Tazaki
Felidae
Peter Schumann

SONNTAG 20:00
CLOSING
Mira
_______________________
WIR WÜNSCHEN FROHE FESTE!

KaterCast 67 - Tante Emma - Harter Kater Edition

KaterCast Nr. 68 für Euch von Esther Silex !!!

SoundCloud: @esther-silex
FaceBook: www.facebook.com/esthersilexmusic
Instagram: www.instagram.com/esthersilex/
Beatport: www.beatport.com/artist/esther-silex/520987

KaterCast 68 - Esther Silex - Heinz Hopper Edition

KaterCast Nr. 69 für Euch von Madota !!!

SoundCloud: https://soundcloud.com/madota
FaceBook: https://www.facebook.com/MadotaMusic
Instagram: https://www.instagram.com/madotamusic/
Beatport: https://www.beatport.com/artist/madota/654322

KaterCast 69 - Madota - Kiosk Edition

Coss & Peter Schumann - Baba EP

Coss & Peter Schumann have been in the studio for a year.
Light-hearted. Sometimes more, sometimes less.

A few tracks have been created and two of the most beautiful pieces are finally here.
CHAPORA & ARAMBOL were produced especially for Kiosk ID.

Peter Schumann spent years travelling in India, so the names and mood of the tracks are a little reminiscence of his favourite places.

Coss, who already has numerous releases on his label Metanoia and Betonstrand, while Peter Schumann, who together with Mira is the initiator of the Kiosk ID label, is now celebrating his debut EP for Kiosk ID.
For both, it's about getting out of their comfort zone and trying something new ....

The well-known gentlemen AUDIOJACK, CHILL SANDER and BO IRION have each teamed up for a remix that fits perfectly with this EP.

Chapora -
"It must go on! Drive! It has to pull you somewhere, suck you in!" They said and asked for a beat.
"Well, I'll play it for you!" replied Coss and Schumann.
An effortlessly spinning spiral of bass and vocal snippets.

Artist: Coss & Peter Schumann
Title: Baba EP
Label: Kiosk I.D.
Catalogue number: kioskid019
Release Date: July 21, 2023
Buy Link: kioskid.bandcamp.com

Follow & Support:
Kiosk I.D.
SC: @kioskid
FB: facebook.com/KioskIDMusic
Bandcamp: kioskid.bandcamp.com/releases Beatport: www.beatport.com/label/kiosk-id/80379
IG: instagram.com/kiosk.id

Peter Schumann:
SC: @peter-schumann
FB: www.facebook.com/PeterSchumannMusic/
Beatport: www.beatport.com/artist/peter-schumann/8886
Spotify: open.spotify.com/intl-de/artist/5…BCaTHEXSrFFnup3I
IG: www.instagram.com/peter_schumann_kater

Coss:
SC: @coss
FB: www.facebook.com/cosslive
Beatport: www.beatport.com/artist/coss/212284
Spotify: open.spotify.com/intl-de/artist/3…Ewo5Vpejw0r3dV74
IG: www.instagram.com/cossxxy/

Baba EP

PREMIERE : coss & Peter Schumann - Chapora (Original)

KaterCast Nr. 70 für Euch von Peter Schumann !!! download is enabled!

Peter Schumann:
SC: @peter-schumann
FB: www.facebook.com/PeterSchumannMusic/
Beatport: www.beatport.com/artist/peter-schumann/8886
Spotify: open.spotify.com/intl-de/artist/5…BCaTHEXSrFFnup3I
IG: www.instagram.com/peter_schumann_kater

Playlist:
01.  Weather Master - Mano Le Tough
02. Human Behavior - Laura BCR, Launaea
03. Dream sequence (Yør Kultura remix)- JOBE
04. Yakamoz - Coss
05. Victims of the Funk (Dario D'Attis Dubby Dub)- Luna City Express
06. Dictator (Luke Alessi Remix)- The Organism
07. Fire - Robag Whrume
08. The Girl Next Door - Adam Ten, Yamagucci
09. Make Revolution - Yamagucci
10. Renegade - Nicolas Masseyeff, Parallelle
11. Sauna - Renato Cohen
12. Chapora - coss & Peter Schumann
13. Arambol - coss & Peter Schumann

Artist: Coss & Peter Schumann
Title: Baba EP
Label: Kiosk I.D.
Catalogue number: kioskid019
Release Date: July 21, 2023
Buy Link: www.kioskid.bandcamp.com

Kiosk I.D.

KaterCast 70 - Peter Schumann - Heinz Hopper Edition

KaterCast 71 diesmal von und mit Dave Dinger !!!
Enjoy !!!

SC: @dave-dinger
FB: www.facebook.com/dingerdave/
Beatport: https://www.beatport.com/artist/dave-dinger/1015317
Spotify: https://open.spotify.com/intl-de/artist/10C4R3Lz6fcSPZ3OcgVQoM
IG: https://www.instagram.com/dave_dinger/

KaterCast 71 - Dave Dinger - Hasienda Edition

KaterCast 72 diesmal von und mit Farry in einer live Version !!!
Enjoy !!!

SC: https://soundcloud.com/farrylive
FB: https://www.facebook.com/farrylive
Beatport: https://www.beatport.com/de/artist/farry/770133
Spotify: https://open.spotify.com/intl-de/artist/2KI9GWNPBvzYCQxp9wR9yy
IG: https://www.instagram.com/farrymusic/

KaterCast 72 - Farry live! - AcidBogen Edition

KaterCast 73 diesmal von und mit DPAZ !!!
Enjoy !!!

SC: https://soundcloud.com/dpazmusic
FB: https://www.facebook.com/dpazmusic
Beatport: https://www.beatport.com/de/artist/dpaz/781752
Spotify: https://open.spotify.com/artist/3Xs5Ht5qajnLJQFGmy3h4C?si=BRSFMkTmTj6fWiNpLImUkQ
IG: https://www.instagram.com/dpazmusic/

KaterCast 73 - DPAZ - Kiosk Edition

Happy new year ! 
KaterCast 74 kommt diesmal von Sven Dohse in der Heinz Hopper Edition !!!
Enjoy !!!


SoundCloud: @svendohse
FaceBook: www.facebook.com/svendohse.dj
Instagram: www.instagram.com/sven.dohse/
Beatport: www.beatport.com/artist/sven-dohse/11519

KaterCast 74 - Sven Dohse - Heinz Hopper Edition

KaterCast 75 kommt diesmal von Mary Quo in der Kiosk Edition !!!
Enjoy !!!

SoundCloud: https://soundcloud.com/mary-quo
FaceBook: https://www.facebook.com/profile.php?id=100040273667579
Instagram: https://www.instagram.com/mary_quo_artista/

KaterCast 75 - Mary Quo - Kiosk Edition

KaterCast 76 diesmal von und mit HOVR in der Acidbogen Edition !!!
Enjoy !!!

SC: https://soundcloud.com/hovrmusic
FB: https://www.facebook.com/hovrmusic
Beatport: https://www.beatport.com/de/artist/hovr/803054
Spotify: https://open.spotify.com/intl-de/artist/3OKJ15Et50JhoX1zbf0Cdz
IG: https://www.instagram.com/hovrmusic/

Katercast 76 - HOVR - Acidbogen Edition

KaterCast 77 diesmal von und mit LUKO in der Heinz Hopper Edition !!!
Enjoy !!!

SC: https://soundcloud.com/lu_ko
FB: https://www.facebook.com/LUKO2014/
IG: https://www.instagram.com/luko_tomko

Katercast 77 - LUKO - Heinz Hopper Edition

Katercast 02 kommt von unserer Pauli Pocket !!! 
Enjoy !!!

https://soundcloud.com/pauli-pocket
https://www.facebook.com/PauliPocket1/?pnref=lhc

Tracklist: 

1. Anaklia's Dream feat. Deniz Reno (Pepper Cats Remix) - Anton Ishutin, Denis Agamirov
2. The Rise (Original Mix) - Aves Volare, The Note V
3. Sargas (Original Mix) - Danito & Athina
4. Third Lake (Teho 'Danger Zone' Remix) - Boss Axis
5. Sahara (Original Mix) - Anturage, Ira Ange
6. Voyage (Original Mix) - Anturage, Montechi
7. The Hit (N'Pot Remix) - Erdi Irmak
8. Charlotte (Original Mix) - Township Rebellion
9. Crop Circles (Original Mix) - Anturage, Saccao
10. Hotter Than You (Jos & Eli Remix) - Chris Karpas
11. Universe (Original Mix) - Paul Ursin

download is enabled !

KaterCast 02 - Pauli Pocket - Heinz Hopper Edition

KaterCast 05 für Euch von unserer Mira !!!

https://soundcloud.com/mira_kater
https://www.facebook.com/Mira.Artist/

download is enabled !

KaterCast Nr.5 Mira

KaterCast 05 - Mira - AcidBogen Edition

KaterCast 29 kommt diesmal von Dave Dinger in der Special Honeymoon Edition !!! Alles Gute !!!
Enjoy !!! Download is enabled !

https://soundcloud.com/dave-dinger
FB: https://www.facebook.com/dingerdave

Kater Blau

KaterCast 29 - Dave Dinger - Honeymoon Edition

KaterCast 30 kommt diesmal von Dirty Doering  in der Heinz Hopper MützeKatze Edition !!! 
Enjoy !!!
https://soundcloud.com/dirtydoering
FB: https://www.facebook.com/dirtydoering/

KaterCast 30 - Dirty Doering - Heinz Hopper Edition

KaterCast 33 kommt diesmal von Madmotormiquel in der Hasienda Edition !!!
Enjoy !!!

SoundCloud: https://soundcloud.com/madmotormiquel
FaceBook: https://www.facebook.com/madmotormiquel
Instagram: https://www.instagram.com/madmotormiquel/

KaterCast 33 - Madmotormiquel - Hasienda Edition

KaterCast #38 für Euch von unserer Mira !!!

SoundCloud: @mira_kater
FaceBook: www.facebook.com/Mira.Artist/
Instagram: https://www.instagram.com/mira_kater/
Beatport: https://www.beatport.com/artist/mira-berlin/385397

KaterCast 38 - Mira - AcidBogen Edition

KaterCast #39 für Euch von Geju & The Band !!!

SoundCloud: @g-e-j-u 
FaceBook: https://www.facebook.com/GEJUOFFICIAL/
Instagram: https://www.instagram.com/geju___/
Beatport: https://www.beatport.com/artist/geju/561033

Infos: 
All tracks produced by @g-e-j-u 
Drums/fx - Kirill Osherov 
Keys/guitar - Gleb Andrianov 
Sax/synth - Sergey Maltsev

Geju performed their live debut at our friend's concert event series BACKSTAGE OF REALITY at Säälchen.

recorded February 20 / 2020 at SÄÄLCHEN / Holzmarkt Berlin

BACKSTAGE OF REALITY
You might ask yourself: What is that?
When we first thought about an event series, we knew we want to focus on an event that touches each one of your senses. Its about the experience, the journey, the connection between music, visual art and fragrances.
Backstage Of Reality will always present bands and electronic live acts. For some of them it will be the very first time in concert. So you always can expect something special.
We want to invite you for an evening to leave behind your normal life and dive into the Backstage for a few hours - a concert for your senses!  

Artwork by Isakov / www.isakov.de
www.sasomobookings.com

KaterCast 39 - Geju & The Band live - Säälchen Edition

KaterCast #40 von Caleesi

Soundcloud: @caleesi
Facebook: https://www.facebook.com/djcaleesi/
Instagram: https://www.instagram.com/caleesi_music/
Resident Advisor: https://www.residentadvisor.net/dj/caleesi/dates

https://en.unitedwestream.berlin/ #unitedwestream #stayhome 

Info // Tracklist 

Recorded live in Acid Bogen for the live stream fundraiser UNITEDWESTREAM #3 - KATERBLAU on 20.03.2020. 
This initiative was brought to life by Berlin Club Commission,  ARTE & Reclaim Your Culture as a collective effort to support night clubs and cultural institutions in the Berlin music scene, most of whom are facing an existential crisis in the wake of the global repercussions triggered by the Covid-19 Virus.

You can help save the Berlin music industry by supporting the cause with a donation here:
https://www.betterplace.org/de/projects/77946-save-berlin-s-club-culture-in-quarantine

You can re-watch the video on ARTE here:
https://www.arte.tv/en/videos/096844-003-A/united-we-stream-3-kater-blau/?fbclid=IwAR3iX7iRmi9JgkG3QcYz6zFhwdA6QJz_3hPqnxbEsSczhzUtOCEN0eujl0k

Now is the time to support your favourite artists! Check out Beatport & Bandcamp to support their art by buying their productions online:

TRACKLIST

1. Stank - Umami
2. Shaman Journey - Roommates
3. Ethnogroove (NuKreative Remix) - Donz
4. Chorophobia - Double Touch
5. Cosmos - Lawrence Klein, Outcome
6. Natura (Coeus Remix) - Fabra
7. Balkia (D-Nox & Beckers Remix) - D-Formation 
8. Manginot - Khen
9. All Things Fade (Jamie Stevens Golden Return) - Rudy UK
10. Ritual Union (Jo Beschil Remix) - Little Dragon (coming out soon on @circlesandstones)

United we stand - let’s all show some love, support and solidarity for each other!

KaterCast 40 - Caleesi - united we stream - Acidbogen Edition

KaterCast #43 für Euch von Mimi Love !!!

Facebook: https://www.facebook.com/djmimilove
Soundcloud:https://soundcloud.com/spreedelay
Instagram: https://www.instagram.com/mimi_love_berlin/

KaterCast 43 - Mimi Love - Hasienda Edition

KaterCast Nr. 49 für Euch von Lemonella !!!

SoundCloud: https://soundcloud.com/lemonella
FB: https://www.facebook.com/lemonellamusic
Instagram: https://www.instagram.com/lemonella_music/

playlist:
1. Kermesse - Images
2. Little Jungle in Olivos - Manucho (Vedat Mutlu Remix)
3. Sumatra - Meeting Molly (El Mundo & Zazou Remix)
4. Aetius Boutefoy - Dam
5. Anna Caragnano & Donato Dozzy - Parola (DÜK Remix)
6. Die Tropfenkarawane - Fred und Luna (Frankey & Sandrino Remix)
7. Brenda Liebt Den Acid - Eva's Finest 
8. The Empty Quarter - Sound Clinic 
9. Believe - Niko Schwind & Lazarusman
10. PNO - Iorie & Madmotormiquel (Cioz Remix) 
11. Kuli Alma - Boy Oh Boy (David Mayer Remix) 
12. Güte des Schicksals - Disko Jürgen
13. Mr Nobody - MDK
14. Tangler Twisted Twirler - Djolee
15. Vivir en Paz - Biomigrant & Ōme
16. On and On- Erykah Badu (Lopal Edit)

KaterCast 49 - Lemonella - Acidbogen Edition

❤️❤️❤️ Katercast No. 50  with Mira "43 KATZEN TANZEN AUF'M TISCH" Edition ❤️❤️❤️

All tracks are taken from "43 Katzen tanzen auf'm Tisch" Compilation curated by Mira

released on Kiosk -I.D. // Dec. 1st 2020
https://kioskid.bandcamp.com/album/43-katzen-tanzen-aufm-tisch-acidbogen-curated-by-mira
https://kioskid.bandcamp.com/album/43-katzen-tanzen-aufm-tisch-heinz-hopper-curated-by-mira

SoundCloud: @mira_kater
FaceBook: www.facebook.com/Mira.Artist/
Instagram: www.instagram.com/mira_kater/
Beatport: www.beatport.com/artist/mira-berlin/385397

Tracklist below:
01. Wide Awake - O - min 00:00
02. Nico Sun - Specific Space - min 05:55
03. Geju - Fuji - min 13:00
04. Avem - Nostalgia - min 18:28
05. Kleintierschaukel - Lightz - min 24:00
06. Arutani - Moonraker - min 29:23
07. Fata & Morgana, Hobta - Sleeping Issues - min 34:35
08. Tony Casanova, Frida Darko - Point Of View - min 40:12
09. O/Y - Hunger - min 44:50
10. Viken Arman - Katou - min 52:00
11. Glenn Shaw - Solar Funk - 57:40
12. Mira & Christopher Schwarzwalder - Deía - min 01:03:30
13. Sebo - Evolution - min 01:10:25
14. Niki Sadeki - Jane - min 01:16:40
15. Timujin - Belaphone - min 01:22:48
16. Bookwood - Tesla Coil - min 01:28:15
17. Marcus Meinhardt - Josef Bonfa - min 01:33:37
18. Renga Weh - Pearls - min 01:38:50
19. Kadosh, Faide - Nelam - min 01:44:12
20. Jake The Rapper feat. Marvin Jam - The Problem With The Problems - min 01:49:45
21. Atish - Coco Buggy - min 01:53:25
22. Love over Entropy - Bad Weather - 01:59:15
23. Kris Berle - Nine Of Cups - min 02:04:25
24. Kuriose Naturale - Total Holzmarkstrasse - min 02:10:27
25. David Dorad - Doubledee - min 02:15:49
26. Johannes Ton - Ride On - min 02:25:00
27. Oceanvs Orientalis - Asylum - min 02:29:17
28. Dan Bay - Himalaya - min 02:36:12
29. Roderic, Ulises - Cruda - min 02:41:04
30. Coss, Iorie - 2000 Jahre Regen - min 02:4550
31. Kerala Dust - Penelope - min 02:51:36
32. Adam Ten - Bedtime Melody - min 03:01:10
33. Christopher Schwarzwälder - Tropo (Madmotormiquel Remix) - min 03:05:31
34. The Cheapers - Pawel - min 03:12:55
35. Canson - Illy Noise - min 03:18:48
36. Mila Stern - Would Have Had - min 03:22:50
37. Yolanda Frei - Liquor Stores - min 03:28:33
38. M.RUX - AnA - min 03:32:47
39. The Sorry Entertainer - Studio Hustle - min 03:38:55
40. Franca - Desert Groove - min 03:43:32
41. Shkoon, Metatext - Sin - min 03:50:25
42. Sven Dohse - Roof Vibes - min 03:58:10
43. Peter Schumann - Roman IV - min 04:03:50
44. Rampue - Rose High - min 04:11:57

KaterCast 50 - Mira - 43 Katzen tanzen auf'm Tisch Edition

Artist: Gespona, Martín Cozar
Title: Resilience EP
Label: Kiosk I.D.
Catalogue number: Kiosk I.D. 026
Release Date: April 26, 2024
Buy Link: https://kioskid.bandcamp.com  

Follow & Support: 
Kiosk I.D. 
SC: @kioskid  
FB: facebook.com/KioskIDMusic 
Bandcamp: kioskid.bandcamp.com/releases  
Beatport: beatport.com/label/kiosk-id/80379  
IG: instagram.com/kiosk.id  

Gespona
SC: https://soundcloud.com/gespona
FB: https://www.facebook.com/gesponamusic/
Beatport: https://www.beatport.com/artist/gespona/808279
Spotify: https://open.spotify.com/intl-de/artist/59ewWwEHhZ0yq7SKXxUj0d
IG: https://www.instagram.com/gespona_music/

Martín Cozar
SC: https://soundcloud.com/martin-cozar
FB: https://www.facebook.com/martin.cozar
Beatport: https://www.beatport.com/artist/martin-cozar/874521
Spotify: https://open.spotify.com/intl-de/artist/2L7kud2OEMcErUcqhdpvAJ
IG: https://www.instagram.com/martin_cozar/

Remcord
SC: https://soundcloud.com/remcord
FB: https://www.facebook.com/Remcordmusic/
Beatport: https://www.beatport.com/artist/remcord/132813
Spotify: https://open.spotify.com/intl-de/artist/09iSLnIk5tjj4u4T7nrhmB
IG: https://www.instagram.com/remcord/

About:  
Kiosk ID no. 026 is the brainchild of Barcelona wave-benders Gespona and Martín Cozar. On ‘Resilience,’ the duo merges an eclectic array of nuanced sounds with stripped groove structures, delivering a funk-infused four-tracker with three floor-focused originals and an emotional reimagination by Remcord. 

‘Resilience’ draws its infectious dancefloor power from a groove-driven amalgamation of jarring, artfully intertwined sounds. Gespona and Martín Cozar cast classic house chord chops, a captivatingly choppy MC hook, and funky acoustic basslines into a pulsating and sexy framework – dynamic, driving, and irresistibly danceable. 

Remcord’s rework transports the original’s eclectic soundscapes into a reverberating cathedral of rippling, washed-out percussion and subtle resonance. Morphing fields of pads and heavenly plucks transform ‘Resilience’ into a floating, hymnal ballad that casts springy clouds of ambient glitter across a delicate tribal substructure. 

‘Mambo’ is sub-heavy and peevishly spirited. Contrasting a thunderous martial groove, futuristic sweeps, and overdriven impacts with a Swing-era brass section, ‘Mambo’ reimagines the anything-goes energies of the roaring twenties in an electric peak-time crusher with a literal twist. 

‘Lamari’ unfolds a funky bassline, resonating electric impacts, and brightly cascading synth stabs. Mythical whispers and spaced-out robotic vocals imbue the track with powerful hypnotic qualities, progressively transforming ‘Lamari’ into a slow-burning dancefloor seance. 

Drawing on stripped tribal grooves, bursts of electric futurism, and playful leftfield inserts, ‘Resilience’ delivers a striking and profoundly unique brand of driving dancefloor modernism.

Popular tracks by Kater Blau