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Mark Ii __link__ — Steinberg Lm4

Your Android observatory with real-time sky view, AR, telescope control, and the only astronomy app that computes your local horizon from topographic data.

Discover. Explore. Master.
Get it on Google Play
Mobile Observatory Dashboard
200,000+ Installs Across All Versions
4.7 Stars (4,800+ Ratings)
14+ Years of Development
5 Languages

All in One App

Everything you need for astronomy, in your pocket

AR Sky View

Point your phone and identify stars, planets, and constellations live

3D Solar System

Explore planets, moons, and comets in an interactive orrery

Satellite Tracking

ISS passes, Starlink trains, and 10,000+ satellites in real-time

Deep Sky Catalog

2,500+ nebulae, galaxies, and star clusters with photos and details

Event Calendar

50+ event types including eclipses, conjunctions, occultations, transits, and more

Smart Notifications

Aurora alerts, solar flares, ISS passes, and event reminders

Live Space Weather

Aurora forecast, Kp-index, solar flares, and NASA SDO images

Moon & Sun

Phases, eclipses, lunar features, sunspot data, and rise/set times

Topographic Horizon

Real terrain profiles from NASA data for precise rise/set times

Observing Planner

Auto-generated session plans based on your equipment and location

Telescope Control Beta

Connect your GoTo telescope and slew to any object with a single tap

2.5M+ Stars

Hipparcos, SAO, and extended catalogs with detailed star data

Get it on Google Play

Free download with optional Pro upgrade

Screenshots

See Mobile Observatory in action

How It Works

From first launch to expert observer

1
Discover the Sky with Real Terrain

Discover

Point your phone at the sky and see stars, planets, and the Sun's path over your real 3D terrain.

2
Explore Astronomical Events

Explore

Browse upcoming conjunctions, eclipses, ISS passes, and thousands of celestial objects with detailed data.

3
Plan Your Observing Session

Master

Generate optimized observing plans, control your telescope, and log your observations like a pro.

Get it on Google Play

Start exploring tonight

Dive Into the Details

Scroll through real app screens — tap to enlarge

Sun & Solar Activity
Sun & Solar Activity
Moon Details
Moon
Lunar Eclipse Details
Lunar Eclipse
Jupiter Details
Jupiter
Algol Variable Star
Algol — Variable Star
Twilight
Twilight

Mark Ii __link__ — Steinberg Lm4

It democratized rhythm. It proved that a mouse and a monitor could replace a studio full of outboard gear. For the tens of thousands of electronic musicians who started their journey in a dorm room with a pirated copy of Cubase 5.0 and the LM4 Mark II, those blue buttons and punchy kicks are the soundtrack of their youth.

Are you trying to to run on a modern 64-bit operating system?

The Mark II version transformed the simple drum player into a more comprehensive module with advanced sound manipulation:

A clinical, powerful, and forward-thinking instrument that traded sex appeal for pure function. If you ever meet an old-school producer who still raves about "the LM-4," ask them to show you the filter envelope on the kick drum. They will talk for an hour.

The LM4 Mark II proved to a skeptical industry that software could handle the rigorous timing demands of drum sequencing without lagging or crashing. It helped establish the VSTi (VST Instrument) standard as a viable replacement for expensive MIDI rack modules. For many producers working in the early 2000s, the LM4 Mark II was their very first introduction to the world of software-based drum layering.

You could stack up to 16 samples on a single pad. You could set velocity ranges so a soft hit triggers a delicate sidestick, while a hard hit triggers a rimshot. You could also enable "Random" layer selection—primitive round-robin—to avoid the "machine-gun effect" where repeated snare hits sounded identical. This was deeply humanizing.

To help find solutions for your vintage setup or modern equivalents, let me know: Are you trying to on a modern system?

In the mid-to-late 1990s, the world of music production stood at a crossroads. On one side, there was the hardware studio—racks of samplers, drum machines, and synthesizers connected by a spaghetti of MIDI cables. On the other side, the promise of the "DAW" (Digital Audio Workstation) was just beginning to flicker to life. While Cubase had already established itself as a powerful MIDI sequencer, audio recording was still a separate, expensive affair.

The is a landmark in the evolution of virtual instruments, serving as a successor to one of the first widely adopted VST rhythm boxes. Released in 2002 , this 32-bit drum module was designed to offer a balance between intuitive handling and high-performance sample-accurate timing. It significantly expanded upon the original LM-4 by introducing a massive library of high-quality sounds and more advanced sample-shaping tools. Key Features and Specifications LM4 Mark II

The LM-4 MkII was eventually discontinued when Steinberg pivoted to (released 2003). Groove Agent offered a more modern, stylized interface with built-in beats and a focus on acoustic kits. It was commercially more appealing, but many hardcore users felt Groove Agent was a step back in terms of raw sound design power. Groove Agent was a pattern-based drum machine; the LM-4 was a modular drum synthesis lab.

Before the LM4 Mark II, producing realistic drums on a computer required expensive hardware samplers connected via bulky SCSI cables and complex MIDI mapping. The LM4 Mark II proved that a computer's CPU could handle high-quality, low-latency audio sampling internally.

Core Features

Tools for astronomers, astrophotographers, and anyone who looks up

3D Solar System

Explore the solar system in an interactive 3D view

  • All planets, dwarf planets, and major moons
  • 1,000+ comets with realistic orbits
  • Time-travel to any date in history
  • Accurate positions and orbital mechanics

Satellite Tracking

Track the ISS, Starlink, and thousands more steinberg lm4 mark ii

  • 10,000+ satellites with live positions
  • ISS pass predictions for your location
  • Starlink train visibility alerts
  • Iridium flares and bright satellite passes

AR Sky View & Time-Lapse

Point your camera and explore the sky

  • Identify stars, planets, constellations live
  • Time-lapse animation with swipe control
  • Watch planets cross the sky
  • Track satellite passes in real-time

Live Space Weather

Real-time aurora and solar activity dashboard It democratized rhythm

  • Aurora oval forecast with hemisphere view
  • Planetary Kp-index for geomagnetic storms
  • GOES X-ray flux and solar flare chart
  • Hourly NASA SDO solar images

Tonight's Best

Personalized recommendations for your location

  • Best objects visible tonight
  • Based on your actual horizon
  • Filter by object type and brightness
  • Optimal viewing times included

Comprehensive Catalogs

Massive astronomical database at your fingertips Are you trying to to run on a modern 64-bit operating system

  • 2.5 million stars (optional download)
  • Complete Messier, NGC, Caldwell catalogs
  • 60,000+ asteroids & 1,000+ comets
  • Starlink satellites & ISS

Planning Tools

Plan your observing sessions in advance

  • Rise/set/transit against real horizon
  • Automatic visibility reports
  • Favorite locations with easy access
  • Twilight times and day length

Solar & Lunar

Detailed Sun and Moon information

  • Live Sun imagery and sunspot data
  • Moon phases with realistic rendering
  • Lunar librations and orbital data
  • Solar & lunar eclipse predictions

Recent Google Play Reviews

Fresh 5-star feedback from astronomers around the world

★★★★★
"This app is simply fantastic and keeps getting better. It offers a huge variety of features, making it the most professional app in the Play Store."
Google Play User
December 2025
★★★★★
"Version 4 is amazing: intelligently programmed, very well organized. Thank you for this excellent work!"
Google Play User
November 2025
Get it on Google Play

Trusted by a global astronomy community

The Recommended Way to Start

New users should begin with the freemium app, then unlock premium inside the app when they are ready. If you prefer buying up front, Mobile Observatory Pro remains available as the classic paid edition.

🚀

Mobile Observatory Pro

Classic paid edition for users who prefer a separate upfront purchase

  • One-time purchase directly on Google Play
  • All premium features unlocked from the start
  • Same lifetime premium access as the one-time purchase inside Mobile Observatory
  • Separate app for users who prefer buying up front
  • Existing Pro users can continue using it
Get Mobile Observatory Pro Prefer buying up front? Get Mobile Observatory Pro

Experience the Realistic Sky Rendering

About the Developer

The story behind Mobile Observatory

Wolfgang Zima

Wolfgang Zima

Creator of Mobile Observatory

Wolfgang Zima spent years as a professional astronomer before finding his way into software development. After completing his PhD in Astronomy at the University of Vienna, he worked as a postdoctoral researcher at the Institute for Astronomy at KU Leuven in Belgium for five years. It was there that he discovered a passion for scientific software — writing tools for analyzing spectra of pulsating stars and building a CCD image simulator for ESA's PLATO mission, a space telescope searching for Earth-like exoplanets.

Mobile Observatory started almost by accident: when his Nokia phone broke on a mountain biking trip in late 2010, Wolfgang got his first Android phone and was surprised that no good astronomy apps existed. So he built one. First released in January 2011, Mobile Observatory has since grown into one of the most comprehensive astronomy apps for Android and has been continuously improved for well over a decade.

Wolfgang lives in Freiburg, Germany, where he works as a Senior Mobile Developer at sevdesk. He continues to develop Mobile Observatory with the same enthusiasm as on day one — now with the help of modern AI tools that let him bring new features to life faster than ever.

It democratized rhythm. It proved that a mouse and a monitor could replace a studio full of outboard gear. For the tens of thousands of electronic musicians who started their journey in a dorm room with a pirated copy of Cubase 5.0 and the LM4 Mark II, those blue buttons and punchy kicks are the soundtrack of their youth.

Are you trying to to run on a modern 64-bit operating system?

The Mark II version transformed the simple drum player into a more comprehensive module with advanced sound manipulation:

A clinical, powerful, and forward-thinking instrument that traded sex appeal for pure function. If you ever meet an old-school producer who still raves about "the LM-4," ask them to show you the filter envelope on the kick drum. They will talk for an hour.

The LM4 Mark II proved to a skeptical industry that software could handle the rigorous timing demands of drum sequencing without lagging or crashing. It helped establish the VSTi (VST Instrument) standard as a viable replacement for expensive MIDI rack modules. For many producers working in the early 2000s, the LM4 Mark II was their very first introduction to the world of software-based drum layering.

You could stack up to 16 samples on a single pad. You could set velocity ranges so a soft hit triggers a delicate sidestick, while a hard hit triggers a rimshot. You could also enable "Random" layer selection—primitive round-robin—to avoid the "machine-gun effect" where repeated snare hits sounded identical. This was deeply humanizing.

To help find solutions for your vintage setup or modern equivalents, let me know: Are you trying to on a modern system?

In the mid-to-late 1990s, the world of music production stood at a crossroads. On one side, there was the hardware studio—racks of samplers, drum machines, and synthesizers connected by a spaghetti of MIDI cables. On the other side, the promise of the "DAW" (Digital Audio Workstation) was just beginning to flicker to life. While Cubase had already established itself as a powerful MIDI sequencer, audio recording was still a separate, expensive affair.

The is a landmark in the evolution of virtual instruments, serving as a successor to one of the first widely adopted VST rhythm boxes. Released in 2002 , this 32-bit drum module was designed to offer a balance between intuitive handling and high-performance sample-accurate timing. It significantly expanded upon the original LM-4 by introducing a massive library of high-quality sounds and more advanced sample-shaping tools. Key Features and Specifications LM4 Mark II

The LM-4 MkII was eventually discontinued when Steinberg pivoted to (released 2003). Groove Agent offered a more modern, stylized interface with built-in beats and a focus on acoustic kits. It was commercially more appealing, but many hardcore users felt Groove Agent was a step back in terms of raw sound design power. Groove Agent was a pattern-based drum machine; the LM-4 was a modular drum synthesis lab.

Before the LM4 Mark II, producing realistic drums on a computer required expensive hardware samplers connected via bulky SCSI cables and complex MIDI mapping. The LM4 Mark II proved that a computer's CPU could handle high-quality, low-latency audio sampling internally.

Ready to Explore the Night Sky?

Download the recommended app for new users. Premium can be unlocked later inside the app.

Recommended Version Get Mobile Observatory
Classic Paid Edition Get Mobile Observatory Pro