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No, CYW20706 and CYW20719 don't support AAC.
However, CYW20721 supports AAC. The CYW20721 is our latest BR/EDR/BLE Bluetooth 5.0 SoC audio platform for applications ranging from Bluetooth stereo headsets and earbuds to Bluetooth speakers. At this time, this SOC is only available for select partners. Please contact any of the Cypress sales offices in your area.