I have been developed an Arduino Library for Si4735 from Silicon Labs.
The Si4735 is a DSP radio that can be controlled by an MCU.
To know more about the “Arduino Library for Si4735� see https://github.com/pu2clr?tab=repositories

Videos about this project:
Si4735 Arduino Library and SSB Support (Listening to a QSO on 20 meters): https://youtu.be/W2Ssjb9P_f4

Evaluating SSB audio from the SI4735-based radio prototype: https://youtu.be/Xj7zuiyvysI

SI4735 ARDUINO LIBRARY BANDWIDTH TEST : https://youtu.be/dN1s3RoXGos