Telephone Hybrid / AutoHybrid / Hybrid Coupler / Etc.
Continued from the previous page...
Analog Hybrids also apparently do not actually separate the Host Audio from the Caller Audio. Instead, they attempt to subtract the Host Audio from the Caller Audio, thereby forcing the Host Audio into the inaudible background. While they do apparently work with a fair amount of success, they also apparently require adjustment for nearly every call. Phone lines are not completely stable and are subject to many different factors that influence call quality and signal strength, and as a result, Analog Hybrids require constant tweaking.
Digital Hybrids are basically the same as Analog Hybrids, with a few key differences. Digital Signal Processors (DSP) allow for automatic and real-time adjustment of audio separation settings. This leads to excellent separation of Host Audio and Caller Audio. Of course, this comes at a price. A typical Digital Telephone Hybrid, such as the JK Audio Broadcast Host, retails at about $500-- well beyond the budget of most small Streaming Broadcasters.
With any Hybrid, there is also the expense of the phone line or lines, which may cost anywhere from $20 to $60 per line. Multiple-line setups also require a means by which each line is routed to the Hybrid, which is probably not cheap or easy either.