RDS with stereo sound

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  • February 15, 2012 at 4:13 am #13033
    JesseG
    Member

    Breakaway only synchronizes RDS if the RDS signal has the 19kHz pilot somewhere. The 57kHz (19kHz * 3) center of RDS is a suppressed carrier, meaning… it’s not actually there.

    Coincidentally, I haven’t heard of a radio yet that actually requires the RDS to be synced with the 19kHz pilot. Someone from NPR Labs might say otherwise, because they have tested an UBER TON of radios.

    February 15, 2012 at 6:44 am #13034
    bennylein1985
    Member

    analog stereo coder + rds coder needs to bee synchronized allways.
    i think when bbp and the rds software running on one pc and using the same clock as reference it doesnt need to bee sync.

    February 15, 2012 at 5:30 pm #13035
    Alcyone
    Member

    I think part of my problem is that I’m running Stereo Tool through Breakaway and the sound generated by Breakaway is automatically inputed into Stereo Tool. Therefore, when I enable the RDS output to the pipeline, it’s creating a loopback. I’ll continue to hack through this and post my results. I’m reluctant to spend the money on airomate. Perhaps a free RDS generator exists.

    February 16, 2012 at 4:36 am #13036
    Alcyone
    Member

    The problem is my transmitter only has one input for the audio and mic. I assume the wideband input is built into the audio input considering it has programmable RDS on the front panel. That means the same sound card that runs my processed audio also has to carry the RDS pilot tone. The problem is, I can’t figure out anyway to do this. I tried using a stand alone RDS generator to output to a breakaway pipeline and then using that pipeline as the input. Not only does the RDS REFUSE to show up on any receiver, I get crappy mono sound coming through my audio.

    Looks like I’ll just have to give up on this as there obviously isn’t a way that’s going to work with my setup.

    I appreciate the help regardless.

    February 16, 2012 at 5:47 am #13037
    Dj Buik
    Member

    [quote author=”Alcyone”]The problem is my transmitter only has one input for the audio and mic.[/quote]

    If you can get a grip on your schematic diagram of your transmitter,
    then you can build a MPX (BNC) input on it.

    February 16, 2012 at 10:14 am #13038
    JesseG
    Member

    Ah the transmitter doesn’t even have composite input. Well there’s your problem. 😉 And yeah, get a schematic so you can bypass the audio front-end on it. 8) You won’t believe how much better it sounds using the composite from Breakaway.

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