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Live Sound

Spatialization in live sound presents unique challenges: limited setup time, variable conditions, and need for real-time control.

Specific Constraints​

Time​

  • Setup in a few hours
  • Short soundchecks
  • No time for fine-tuning

Space​

  • Different venues each night
  • Variable acoustics
  • Different speaker configurations

Reliability​

  • No second chances
  • Backup needed
  • Non-specialist operator possible

Preparation​

Template Configurations​

Prepare presets for different configurations:

Preset 1: Small venue (8 speakers)
Preset 2: Medium venue (12 speakers)
Preset 3: Large venue (16 speakers)

Spacelite Templates​

Create base configurations:

# 8 speaker configuration - front arc
/bus/A/output/1-8/active 1
/bus/A/output/9-16/active 0
/bus/A/hsr/width 0.8

Setup Workflow​

Phase 1: Physical Installation (2h)​

  1. Place speakers per plan
  2. Cable (analog or network)
  3. Check each line

Phase 2: Spacelite Configuration (30min)​

  1. Load appropriate preset
  2. Enable used outputs
  3. Verify routing

Phase 3: Quick Calibration (1h)​

  1. Level: Pink noise, equalize SPLs
  2. Delays: Measurement or distance estimation

Phase 4: Verification (30min)​

  • Test with familiar music
  • Check coverage
  • Test programmed cues

Show Control​

QLab Integration​

QLab can control Spacelite via OSC:

Cue 1: Opening
  /bus/A/hsr/position 0.0
  /bus/A/hsr/width 1.0
  /bus/A/gain -6.0

Cue 2: Solo voice stage left
  /bus/A/hsr/position -0.7
  /bus/A/hsr/width 0.3

Cue 3: Surround effect
  /bus/A/hsr/position 0.0
  /bus/A/hsr/width 2.0

Control Surface​

TouchOSC or equivalent for live adjustments:

  • HSR position fader
  • Width fader
  • Zone levels

Typical Use Cases​

Musical Theater​

Bus A: Music (8 outputs, front arc)
Bus B: Amplified voices (4 outputs, line array)
Bus C: Effects (4 outputs, surround)
Bus D: Stage monitoring

Amplified Acoustic Concert​

Bus A: Extended stereo pair
  /bus/A/hsr/width 1.2
  /bus/A/subwoofer/active 1

# Distribution across 6 front speakers
/bus/A/output/1-6/active 1

Backup and Safety​

Fallback Configuration​

Always prepare:

  • "Bypass" preset (direct sound)
  • Spare cables
  • Documented configuration

Emergency Procedure​

In case of problems:

  1. Switch to bypass preset
  2. Diagnose
  3. Repair or work around
  4. Resume
# Bypass preset: everything centered, wide
/bus/A/hsr/position 0.0
/bus/A/hsr/width 1.0
/bus/A/output/1-16/trim 0.0

Show Checklist​

Before Show​

  • Configuration loaded
  • All speakers tested
  • Delays calibrated
  • Levels balanced
  • Cues programmed
  • Backup accessible

During​

  • Level monitoring
  • Cue following
  • Ready to intervene

After​

  • Save final configuration
  • Note adjustments
  • Document for next time