Fixed Installation

Permanent installations (museums, commercial spaces, houses of worship) have specific requirements: reliability, minimal maintenance, and often unattended operation.

Characteristics

Priorities

Criterion	Importance	Reason
Reliability	Critical	24/7 operation
Maintenance	Minimal	No technician on-site
Simplicity	High	Non-specialist operators
Scalability	Medium	Possible updates

Constraints

Autonomous operation
Automatic restart after power failure
Remote control desirable
Complete documentation

System Architecture

Autonomous Configuration

Spacelite must start automatically with correct configuration:

┌─────────────────────────────────────────┐
│                Mac Mini                 │
│  ┌─────────────────────────────────┐   │
│  │         Spacelite              │   │
│  │  (automatic startup)           │   │
│  │  (persistent configuration)    │   │
│  └─────────────────────────────────┘   │
│                  │                      │
└──────────────────┼──────────────────────┘
                   │
         Audio to speakers

Redundancy

For critical installations:

Dual Mac (primary/backup)
Automatic failover
Remote monitoring

Use Cases

Museum / Exhibition

Typical configuration:

Multiple independent audio zones
Looping content
Sensor triggering

Bus A: Zone 1 - Introduction (4 speakers)
Bus B: Zone 2 - Main exhibition (8 speakers)
Bus C: Zone 3 - Immersive room (12 speakers)
Bus D: General PA (4 speakers)

Control:

# Zone activation (via presence sensor)
/bus/A/mute 0  # Visitor enters Zone 1
/bus/A/mute 1  # Visitor leaves Zone 1

Commercial Space

Spatialization for ambiance:

# Wide, even distribution
/bus/A/hsr/position 0.0
/bus/A/hsr/width 1.0

# Level adapted to time of day
# 8am-6pm: -20 dB
# 6pm-8pm: -25 dB
/bus/A/gain -20.0

House of Worship

Priority: Speech intelligibility

# Voice configuration
/bus/A/hsr/width 0.6    # Moderate distribution
/bus/A/subwoofer/active 0  # No sub for voice

# For music/organ
/bus/B/hsr/width 1.2
/bus/B/subwoofer/active 1

Remote Maintenance

VPN Access

Secure network configuration:

Site ──► VPN ──► Internet ──► Technician

Remote OSC Control

Via VPN, technician can:

Adjust levels
Modify parameters
Diagnose problems

Monitoring

Proactive surveillance:

Output status (active, level)
Silence detection
Automatic alerts

Scheduled Programming

Time-Based Scenarios

Example for commercial space:

Time	Action
8:00	Start, low level
9:00	Normal level
12:00	Reduced for lunch
14:00	Normal level
19:00	Reduced level
20:00	Shutdown

Implementation

Via script or external controller:

# Example cron job (macOS)
0 9 * * * osascript -e 'tell app "Spacelite" to set gain to -15'

Or via OSC from automation:

00 → /bus/A/gain -15.0
00 → /bus/A/gain -25.0
00 → /bus/A/gain -15.0

Installation Documentation

Technical File

Required content:

Layout diagram
Equipment list
Spacelite configuration (export)
Troubleshooting procedures
Maintenance contacts

Labeling

On site:

Each cable identified
Each speaker numbered
Correspondence with diagram

Training

For on-site staff:

Basic operations (on/off)
Volume adjustment
Who to call if problems

Reliability

Critical Components

Component	Redundancy	Solution
Mac	Optional	2nd Mac on standby
Audio interface	Desirable	Spare on site
Cables	Yes	Spare on site
Speakers	Per pair	Degraded config

Periodic Testing

Schedule:

Monthly test of all outputs
Quarterly level check
Annual recalibration