Total posts : 45366
(Again, I greatly appreciate the effort you folks have put into your replies. And, I’ll be giving those “legal implications” issues some serious consideration.)
Here’s a summary of where I stand in working on my problem:
The clipping problem is only heard on FM receivers when I use my laptop as my audio source (through the computer’s headphone jack). The clipping is heard whether I’m playing MP3s with Windows Media Player or streaming audio like pandora.com.
I get loud and clean FM output (CD quality) when I use any other available audio input source that’s been available for testing: my own portable MP3 player, friends’ two different iPods, the stereo RCA audio outs on my 32″ TV — and I even plugged a portable FM radio into the transmitter.
Shortly, I’ll be able to try another input computer (or two, or three).
As one of you suggested, I contacted mobileblackbox.com’s tech support and asked if my transmitter’s circuitry contains any filtering; it doesn’t.
I can place the transmitter a few inches away from my laptop and plug an iPod into the transmitter’s input and the sound from FM receivers is excellent. So interference from the transmitter’s proximity to the computer probably isn’t an issue; the physical connection from the computer to the transmitter via the 1/8″ stereo cord seems to be where I’m getting in trouble. Could something as simple as an “attenuating dubbing cord” (mentioned in a post above), or some simple means of matching impedance be a possible fix?
I plod onward…