Asterion Alarms

Flashing alarms, speakers and a visual logic editor for facilities, labs, bases and security rooms.

Requires Asterion Logic, which adds the Logic tab to the Asterion Controller.

Features

• Alarms in 8 colors that flash and play sound
• Speaker for announcements, intercoms and looping sounds, with no light
• Upload your own sounds: MP3 or WAV, up to 30 seconds
• Built-in alarm sounds included
• Adjustable volume (0–100%), hearing range (8–500 blocks) and flash speed (0–5, where 0 = solid on)
• Loop on or off: repeat while powered, or play once per redstone signal
• Group alarms and speakers by name: a controller drives every one sharing its name in the dimension, however far apart they are
• Asterion Controller with a visual logic editor: script what each side does with drag-and-drop blocks
• Side lamps on the controller show which side is receiving redstone
• Save and load your logic, private to you
• Perfect for SCP facilities, labs, military bases and security rooms

How it works

Place an Alarm or Speaker and give it a name. Place an Asterion Controller, type that same name on its Setup page, and power it with redstone. Every linked alarm flashes and plays your chosen sound in sync, and every linked speaker plays it.

To name a placed alarm or speaker, right-click it. To name one before placing it, hold it and Shift + Right-Click; it keeps the name when you place it. Several controllers can share a name, for example one at each entrance.

Custom sounds

On the controller's Setup page, click Upload and pick an MP3 or WAV file (up to 30 seconds and 5 MB). The sound uploads to the server, is shared with everyone on the world or server, and appears in every controller's sound list.

Speakers

A Speaker plays the same sounds as an alarm, without the light. With Loop on, the sound repeats while the controller is powered and stops when the power is cut. With Loop off, it plays once per signal and finishes even after the signal ends, so one button press plays a whole announcement. Players who log in or walk into range while a loop is playing hear it too.

Logic editor

The controller's Logic page shows the controller as a frame with four side ports: left, top, right and bottom. A port lights red while redstone reaches that side, and so does a lamp on that edge of the block. Click a port to open its graph:

• Drag a wire out of a block's white dot and let go to search for the next block.
• Click a block to edit its settings, such as which sound to play, loop on or off, or how many seconds to wait.
• Right-click a block, or press Delete, to remove it.

Available blocks:

• Events: when signal turns on, when signal turns off, while signal is on
• Sound: play sound (pick or upload a sound, loop or once), set volume, set hearing range, set loop
• Alarms: turn alarms on, turn alarms off, set flash speed
• Flow: wait (seconds), repeat (N times), wait for a signal on another side, stop other sides, reset to setup settings

With the screen open you can watch it run: lights travel along the wires, the running block is outlined, and waits fill a progress bar.

Each side runs on its own. If two sides change the same setting, the block that ran last wins; use Stop other sides to give one side priority. Ctrl+Z and Ctrl+Y undo and redo, Reset restores a side's default logic, and the mouse wheel zooms.

Save stores a side's logic under a name and Load puts it on any side of any controller, like structure-block saves. Saves are kept per player on the server, so you only see your own, and they survive the controller being broken.

Controllers from older versions keep working as before: any powered side turns the alarms on, until you edit one of their sides.

Colored lighting

Install Colorful Lighting to make active alarms give off colored light matching the alarm color.

Recommendations

• Redstone Pen for clean redstone wiring to your controllers

Compatibility

• Requires Asterion Logic
• Required on both client and server