There is some really cool stuff that you get when you use an a/d converter in conjunction with a soundbar. First of all, when you plug in the piano, the soundbar will automatically turn on and switch to the right input. In this case the input is be "Optical."  The other advantage is that the optical connection is nice and solid.
AirPort Express mounted under piano with white bracket.
White 6 footer Signal Cable for easy identification. This is white like AirPort. Gold tips. High quality cables for good signal strength. Carries piano and audio signals.
This balance control box is mounted out of sight under the piano. It has no volume knobs on the front.
IQ Control Box under piano. Click on box to learn about how to calibrate or "Learn" your piano keys.
This A/D Converter box is mounted under piano. This box keeps the SoundBar on and also causes it to switch to "Optical" input automatically.
Optical Cable which goes from A/D Convert to Sound Bar.THE SOUNDBAR COMES WITH A CABLE BUT IT'S PRETTY CHEAP. THIS CABLE IS THICKER AND HIGHER QUALITY.


Our piano's network is usually called "Piano Network" or the very model of the piano. The password is always "password".
PD Remote iPad ipad/mini App gives you incredible and extremely simple control over your piano.
WiFi signal to from PD Remote app on your iPad to AirPort Express under your piano.
 
This is AS GOOD AS IT GETS!!! Oh ya baby! You are seeing the ultimate iQ configuration. Everything you see below has a link attached to it. Most stuff you can get right from Amazon. You'll need the soundbar bracket from me.
Why the balance control box under the piano? Three reasons:

1. The piano signal is stronger than the audio signal coming from the AirPort Express. The box allows you to turn it down which in turns gives the SoundBar more juice to work with. Without it, you'll have troubles getting the SoundBar to be loud enough.

2. Enhances the operation of PD Remote App. Reason why... The iQ box under the piano no longer tries to balance the piano and audio signals because this box separates the two signals and only sends piano to the iq. It then sends audio separately to the a/d converter.

3. Allows you to balance piano and audio before the piano even "sees" the signals.
Black 6 footer for clean Piano Signal to iQ Box.
This exact SoundBar is perfect for PianoDisc systems. It's simple to mount. It sounds incredible. Comes with a wireless sub which is pre-paired. It's 320 watts of beautiful orchestration. It also has BlueTooth which means you can use your piano as a stereo. Just a fun little feature.
Keep this turned up all the way.
Turn this one down 25 percent or so. By doing so, piano gets turned down, SoundBar gets turned up.
Incredibly nice bracket for this very soundbar made by yours truly. Makes installation cake. Also moves soundbar closer to bottom of piano. Soooooooooooooooooo the way to go. The bracket that the soundbar comes with doesn't work very well with a piano. Once agin, this works perfectly. Need one? Let me know. Send email to hayesiq@gmail.com  or text me 8016875413
High quality RCA 3' Amazon.