Home Forums BreakawayOne Pre-emph options in FM core

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  • #3235

    Hi all, I'm only finding 75us and 50us as pre-emph options in the FM core, and not 25us and 15us like in Breakaway Broadcast. Were the 25us and 15us left out, or am I missing where they are located? Thanks.

    #14718
    BobbyB
    Participant

    FM broadcast only use 50 or 75 uS. depending on country, US uses 75, Europe 50.

    #14719
    Leif
    Keymaster

    I left them out this time around. The 15 and 25us options were an experiment to use the FM clipper for streaming, and it worked fairly well back then. However, the streaming landscape has changed in the 7 years since BBP was last released; back then high bit rate streams were fairly common, now aacPlus is much more common, and then using any kind of clipper yields terrible results, as anything density created by the clipper will show up as large overshoots on the receive side.
    I could explain it ad infinitum, but BreakawayOne had to be easy to use. Thus, FM and Streaming is completely separate in BreakawayOne.

    For streaming, use an HD core, which has no pre-emphasis options or clipper at all, instead it uses an advanced look-ahead limiter which sounds much better for streaming.

    Best,
    ///Leif

    #14720
    Anonymous
    Guest

    Awesome idea leif. the new limiter in the HD is awesome, like the optimod sound card….

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