I am a listener of my WiFi radio, but when I listen to most broadcasts they are in mono most of the time. I wanted to build a mono to stereo converter to at least hear the broadcasts in stereo. I know it will not work with AM radio broadcasts, but I would probably try it out. It's better than nothing. The problem is that I cannot find this IC that is required on the web. The TBA3810. If someone can help me find the IC for this circuit I would appreciate it. If I can get this IC, I can get this circuit built and test it on my stereo system.
Datasheet Archive dot com has never heard about this IC. I don't think it was ever sold and is not made anymore. It is impossible to "make" stereo from a mono signal. Maybe it makes "boom-boom" on one channel, and makes "peep peep" on the other channel. It is not stereo.
Of course the circuit does not magically make stereo sound from a mono source, it just shifts stuff between channels based on frequency to sort of simulate it and make audio more "spatial".
The circuit works with ANY mono source. Not sure how well it would work on pure vocal though. Probably make things sound robotic.
Thanks for the correction, I see in the shopping part of google that they are still available to buy online. This decoder sounds like something that should be a kit, I might find some small enclosure for it to be added to my stereo system. Why didn't they add this to radios when a broadcast is only in mono like AM radio?
When there is stereo there is 5.1 channel surround sound available. Cause I remember when I was playing one of my 8 track tapes and switched the stereo receiver to surround I could hear the main vocals coming out of the center channel and the instruments come out of the surround sound speakers, this circuit might work for home theatre systems that are suffering mono television broadcasts.
The IC does not make stereo sound from a mono input. That is impossible. The IC simply has a few filters so some frequencies "boom-boom" go to one channel and other frequencies "peep peep" go to the other channel. That is not stereo.
You can make psuedo surround sound from stereo because different phase shifts and delays are present between the two stereo channels.
Mono (vocals) come from the center front channel and stereo (instruments) come from the left and right front speakers in a surround sound system. So with a mono input then only the center front speaker will play.
I have an option in my Sound Card's configuration program to turn on/off a feature called "speaker fill". It expands stereo from music files which are typically 2-channels out to 5.1-channels. Overall it does make for a better listening experience but not so much when I have the headphones on because they are only 2-channels. So I turn off "speaker fill" when I have my headphones on and when doing music editing/creation for higher fidelity.
When one person suffers from a delusion it is called insanity. When many people suffer from a delusion it is called religion.
When there is stereo there is 5.1 channel surround sound available. Cause I remember when I was playing one of my 8 track tapes and switched the stereo receiver to surround I could hear the main vocals coming out of the center channel and the instruments come out of the surround sound speakers, this circuit might work for home theatre systems that are suffering mono television broadcasts.
There isn't anyway way to make 5.1 out of synthesized stereo because the synthesized stereo is unlike true stereo sound...it came from one channel instead of two channels and is "faked" by playing some frequencies out of one speaker and other frequencies out of the other.
Mono to Stereo Converter Circuit
Posted - Nov 23 2010 : 2:22:45 PM
