I’m new to this site and I liked what I saw, I’m also a noob so be kind to me. Anyways, I am starting a project, I already have a Class D Amplifier that I am going to use as a Stereo Audio receiver. What I want to do is make a touch button, On and Off switch that lights on and off to notify of on and off turn on. Another thing I want to add on to it is a wireless Audio Compatability to be able to receive sound wirelessley, from a laptop and or MP3 player. I want to know what type of Wireless connection would be good to use? Bluetooth, Wifi, and or other? Any help as to how to go about this would be helpful. Don’t forget I am new to this stuff, I do know some electronics but I’m not extremely knowledgeable. I have been thinking of this idea since 2004 but now that the technology has gotten better I thought I’d try and do it now. 
My suggestions/opinion:
Use analog for wireless audio, for simplicity as a novice. One easy way is to use an FM broadcast band transmitter - connected to the audio from your PC’s sound card. Or the earphone jack of an MP3 player/smart phone.
The receiver is an FM radio - like ones in some MP3 players or phones or ye ole pocket-portable radio.
Class D amplifier - A simple on/off keying transmitter like a garage door opener uses seems to qualify as class D. There are many kits and simple designs for transmit/receive via RF and via infrared that use on/off keying (OOK). Most generate a carrier frequency, say, 433MHz for RF, or 38KHz for Infrared (IR). Then that carrier is turned on/off (OOK) in accordance with a serial data stream of 1’s and 0’s, at a rate far lower than the carrier. In IR, this is typically about 1,000 bits per second (1Kbps) as compared to the 38Kbps carrier.
stevech:
My suggestions/opinion:Use analog for wireless audio, for simplicity as a novice. One easy way is to use an FM broadcast band transmitter - connected to the audio from your PC’s sound card. Or the earphone jack of an MP3 player/smart phone.
The receiver is an FM radio - like ones in some MP3 players or phones or ye ole pocket-portable radio.
Class D amplifier - A simple on/off keying transmitter like a garage door opener uses seems to qualify as class D. There are many kits and simple designs for transmit/receive via RF and via infrared that use on/off keying (OOK). Most generate a carrier frequency, say, 433MHz for RF, or 38KHz for Infrared (IR). Then that carrier is turned on/off (OOK) in accordance with a serial data stream of 1’s and 0’s, at a rate far lower than the carrier. In IR, this is typically about 1,000 bits per second (1Kbps) as compared to the 38Kbps carrier.
Ok, thanks for the info but I would realy like to try something in either the bluetooth or Wifi area, but I will take your thought into consideration, and as for the on off switch I did some online search and found a few touchscreen on off key switches.
I would like to update that I have now found allot of more stuff to use on my project, I have found a LCD Touchscreen that I am going to use as the turn on and off switch which will also control the volume knob and other various things when I add them to the amp. I already have a remote control volume switch for 5 different channels of digital stereo control, which I will also be connecting to a wireless module. So I will be able to control it from a I-phone, Droid, laptop or whatever I want it to. I will be adding some optical digital lighting to the project box. If I need anymore help on something I will post on here for help. again thanks for any answers I have gotten.