No one? Seriously?
My apologies for the impatience, and thanks for the help guys.
Buffers maintain the proper impedance within a signal chain and are used in all audio processing and specificaly designed to work with a high or low impedance signal.
The best way to understand impedance is that it is a method to promote proper voltage transfer between devices and here are some everyday examples of impedance.
If you can remember these basic rules, you will understand how to route signal cable for instruments, audio processing, sound systems or home stereo properly avoiding and minimizing hum and noise.
Instruments with magnetic pickups are Unbalanced High Impedance (high Z weak signal source)
XLR Microphone Cables are Balanced Low Impedance (low Z weak signal source)
Home Stereo connections are Unbalanced Low Impedance (low Z stronger signal source @ -10dbu)
Pro Audio Gear are Balanced Low Impedance (low Z highest signal strength @ +4dbu)
These are audio signal transfer standards that used to manufacture gear for a specific application
The rules-
Balanced Low Impedance Signals can be driven up to 100' with minimal degradation with proper preamplification
Limit cables runs for Unbalanced Hi (guitars) or even Unbalanced Low Impedance (home stereo) to under 25 feet with the upper limit possibly introducing hum and noise
Impedance is reffering to voltage transfer
Current transfer is then broken into High and Low signal Strengths
High Signal Strength is broken into 2 categories
Line Level -10 dbm
-consumer grade home stereo, some low end audio gear
Line Level +4 dbm
-sythesizers, audio rack gear, sound and recording systems
Low Signal Strength
-instruments and microphones
Now why does it sound like sheet when you plug your guitar/bass/mic into your home stereo aux inputs..... impedance mismatch.
All are unbalanced signals but the guitar/bass/mic is a high imp source where the home stereo is a low impedance source
Can you use a buffer to interface your guitar to your home stereo, simplisitcaly yes, but only if its designed to provide the proper impedance match to the input and output
Balancing is the key to driving a signal through a long cable
So your thinking well why not just convert the guitar signal to a balanced low imp signal so I can have 50 pedals and drive a 50 foot signal chain
Its been done, its called the Les Paul Recording model but due to increased cost of making instruments and amps Balanaced Low Imp, it was never adopted by industry.
Converting it is not a good solution since there is loss in the conversion using transformer coupling, a better way is to do what Les Paul did, Low Imp from pickups to amp
I am just doing my part to rid the world of hum and noise and promoting proper impedance matching