If you want it free legally: try the from Waves or use alternatives like Analog Obsession LALA (free, open source).
The Waves CLA-2A Compressor is not currently available for a permanent free download, as it is a paid product typically sold for around . However, you can often find ways to try it or find legitimate free alternatives that offer the same legendary "optical" sound. How to Get it for Free (Legally)
If you specifically need the "2A" sound (smooth, optical tube compression), these highly-rated free plugins model the same legendary hardware as the Waves version:
through the Waves Creative Access subscription or as part of the CLA Classic Compressors bundle.
Explain that it's an emulation of the classic 1960s tube hardware known for its "T4" optical attenuator.
Waves does not offer that plugin for free outside of:
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