Antelope A4-1B Opto-Valve: Modern Reimagining of a Legendary Tube Compressor

09/25/2025

The Antelope A4-1B Analog Automated Opto Valve Compressor combines the warm, smooth sound of vintage analog compression with the precision and flexibility of digital control. Andrew is in the recording studio to break down how the A4-1B Opto-Valve works and how you can use it in your music production. Thank you to Alana Alexander and Atomic Sound in Brooklyn!

  • 0:00 - About Tube Compressors
  • 1:06 - Singing Performance
  • 1:33 - Settings
  • 2:24 - Vocals: Uncompressed vs. Fixed Timing
  • 2:45 - Hybrid Timing Setting
  • 3:33 - Vocals: Hybrid Timing
  • 4:00 - Digital Control Capability
  • 4:46 - Side Chain Filtering & Audio Samples
  • 5:32 - High Pass on Mono Mix
  • 6:06 - Vocals: De-ess Mode
  • 6:17 - Subscriptions & Licensing
  • 7:27 - Final Thoughts

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