Slow frame rate in Logic Pro with Reference 4 AU plugin

Reference 4 is unsupported and discontinued since 2021. The Reference product line continues with SoundID Reference, learn more here:

  → Reference 4 system requirements and support status
  → What's new in SoundID Reference?
  → Upgrade paths for Reference 3 and 4

How to resolve slow frame rate issues with the Reference 4 AU plugin in Logic Pro.

In this article:

• Slow graphical performance issue in Logic Pro X when Reference 4 plugin is engaged
• Resolve the issue with macOS color code settings

Slow graphical performance issue in Logic Pro

If you are experiencing slow graphical performance with the Reference 4 plugin in Logic Pro, you might be encountering an unusual slow frame rate issue when multiple displays are connected:

• AU processing performance is normal on the primary screen but becomes sluggish on the secondary screen (with Logic Pro open on the secondary screen).
• Clicking on the On/Off button in the Reference 4 plugin has some latency to it on the secondary screen.
• UI elements, for example, audio signal metering level movement, become slow and sluggish.

Resolve the issue with macOS color code settings

The issue is connected to display color code settings in macOS, and is not limited to Reference 4 software - any software product using the same code language as Reference 4 plugin can also be subject to this issue. The problem can be resolved following the instructions below:

1. Go to System Preferences > Display Settings > Color.
2. Select the sRGB IEC61966-2.1 setting for the external monitor/secondary display screen.