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Audio should be compared

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andreasmaster

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We are having a project that we are doing internally in our office and we need some help on the programming of this circuit if you can help



I attached the photo of what we need done. Can you help us on how to create the electronic circuit for this? What kind of equipment shall we need? And will we need to program an EEPROM for this? If yes, how can we program it?



If you cannot help but you can guide us to the right direction of anyone who can, any help is appreciated.
 

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You do not say what the circuit is comparing:
1) Arrival time of the sounds?
2) Amplitude (loudness) of the sounds?
3) Frequency of the sounds?

Maybe you want the comparison to determine if the program at a DVD input is the same program playing at the main input? Then a simple circuit can be used if they are exactly the same.
 
What we actually need to do is to have a microphone getting the audio signal from the TV set.
At the same time we will have 2 DVD players sending audio signal.
We need to compare the audio from the microphone in realtime with the audios coming from the two DVD players.

From there on, as explained on the diagram, if the Audio coming from the microphone is the same as the audio from DVD player 1 the circuit should light LED 1
if the Audio coming from the microphone is the same as the audio from DVD player 2 the circuit should light LED 2
if the Audio coming from the microphone is neither same as the audio from DVD player 1 nor the audio from DVD player 2, then the circuit should light LED 3.

We need help on designing the circuit or if you know of any companies that can design this circuit for us.
 
Where is the computer that will delay the DVD signals so they match the delay caused by the distance of the microphone?
Sound travels at about 768 miles per hour. DVD signals are instantaneous. They will not be the same without delaying the DVD signals the same as the speed of sound.

Even with a delay, the speaker in the TV will not produce the audio from the DVD the same. It will be missing the bass frequencies and will mess up most other frequencies.

You might need a person to light the LED when he thinks the sounds are the same.
 
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