After building our test stereo FM transmitter with RDS based on the RDVV 300mW, I received mails from several people suggesting why not let the PC to do all the signal processing and use a simple FM transmitter. This surely had to be tried and we have build a single pcb "back to basic" version of the the RDVV 300mW without display.
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We use an EMU 0204 USB soundcard, as this soundcard is capable of streaming sound with a high enough sample rate of 192KHz.