All FM radio stations have "pre-emphasis" that boosts treble sounds.
All FM radios have "de-emphasis" that cuts the boosted treble sounds back down to normal and cuts hiss at the same time.
A simple FM transmitter does not have pre-emphasis so it sounds muffled (like your stereo with its treble tone control turned all the way down) when heard on an FM radio.
Of course the transmitter must not be designed with high distortion which some simple circuits have.
Don't you want to transmit a stereo signal? Simple FM transmitters are just mono.
There were some excellent FM stereo transmitter ICs made about 10 years ago made by Rohm. I don't think they are available anymore.
All FM radios have "de-emphasis" that cuts the boosted treble sounds back down to normal and cuts hiss at the same time.
A simple FM transmitter does not have pre-emphasis so it sounds muffled (like your stereo with its treble tone control turned all the way down) when heard on an FM radio.
Of course the transmitter must not be designed with high distortion which some simple circuits have.
Don't you want to transmit a stereo signal? Simple FM transmitters are just mono.
There were some excellent FM stereo transmitter ICs made about 10 years ago made by Rohm. I don't think they are available anymore.