The signal processing is likely in the receiver, too. I don't think audio is sent from the transmitter - I think data is sent, translated to audio, and played back in the receiver.

Ahhh...makes sense

Erik, your primary gripes have nothing to do with the effectiveness of the training aid in helping to develop a more robust and consistent golf swing…

No, they don't. You are correct. However, I found the fact that I needed to use different clubs and that I needed to re-tape every time I wanted to switch clubs severely hampered my ability to get to the "effectiveness" of the system.

I suspect at least part of the reason for this success is that it wasn't sold to, developed, marketed and distributed by an established golf company.

So if the Sonic Golf system were smaller, less expensive, and easier to use, it wouldn't be as good? I think it'd be better, and would be more useful to more people. Again I admire the "go-it-alone" attitude of the Grobers, but I can't help but think it's led to some tradeoffs in the things I just mentioned.

Erik, your primary gripes have nothing to do with the effectiveness of the training aid in helping to develop a more robust and consistent golf swing, eg, didn't like having to use the included grips, re-taping the transmitter. Based on my own experience getting the device ready for my clubs, I didn't find these inconveniences to be significant .

This swing training device is the first one that has resulted in a significant improvement to my golf swing. I suspect at least part of the reason for this success is that it wasn't sold to, developed, marketed and distributed by an established golf company. I have a number of those training aids sitting in my basement gathering dust.

I wonder why they can't just transmit over an FM signal so the user can just use his favorite MP3 player with FM receiver.

The signal processing is likely in the receiver, too. I don't think audio is sent from the transmitter - I think data is sent, translated to audio, and played back in the receiver.

Did Vijay continue to use this tempo tool when he posted just 2 top tens this year???

Thats why they need one for putting, his was not good this year.

I wonder why they can't just transmit over an FM signal so the user can just use his favorite MP3 player with FM receiver. That could reduce the user cost. I totally agree that this is out of most people's price range.

But, it sounds like the bigger issue is having extra (2nd set) clubs with the special grips. I would probably resort to only 2 clubs...7 iron and driver...or something to avoid all of the re-taping and re-fitting.