Abbey Road RS124 Compressor.
The valve compressor Abbey Road's engineers modified from an Altec, in three unit variants.

Overview
Built in-house, one of four.
The RS124 is a heavily modified Altec compressor that Abbey Road built for its own use and treated as a secret weapon, heard on most of what the Beatles recorded there and on Paul McCartney's bass in particular. Two versions are modelled, Studio and Cutter, each with a different valve flavour. It processes and monitors in mono, stereo, left, right, mid or sides, and a sidechain highpass lets bass and kick keep their weight under heavy compression.
Highlights
Compatibility
Specs and requirements.
Licence and delivery
- Formats
- VSTVST3AUAAX NativeAAX DSP
- Licence
- Perpetual licence
- Delivery
- Instant download
- Type
- Compressor
- SKU
- 1246-2756
- Product code
- ABRDRS124
macOS
- OS
- 11 or later (native Apple Silicon)
- Processor
- Apple Silicon & Intel
Windows
- OS
- 10 or later (64-bit)
- Processor
- 64-bit Intel / AMD
Apple Silicon and Intel Macs are both natively supported.
About the maker
Meet Waves.
Waves Audio, founded in 1992 in Israel, is one of the world's largest developers of audio plugins and signal processors. Its catalogue spans EQs, compressors, reverbs, and vintage console emulations used across music, film, broadcast, and live sound.
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