Constant output audio amplifier

[henrybot]

Okay,

I don't know if this makes sense to anyone but me-- I'm looking to build an audio amplifier for my television. Our cable channels have varying volume levels, it seems. I want a box that will compensate for the lower volume level on certain channels. Also, it would be ideal to have the volume dampen a bit when commercials come on. Any ideas? Or are these just pipe dreams?

Thanks,

Mike

 

[audioguru]

My Toshiba TV has an audio compressor that sounds horrible. I turned it off.

Look in Google for Audio Compressor Circuit. Most use a Jfet to change the gain so the average volume is always the same.

 

[Nigel Goodwin]

Do like I do, press the mute button during adverts - making the adverts apparently 'louder' just means I never listen to them.

 

[ronsimpson]

Here is a cheep audio limiter used in tape recorders. NJM2761 Can be found at digikey.com
https://www.electro-tech-online.com/custompdfs/2008/01/Newsletter44_NJM2761AudioLimiter.pdf

If you want very high end limiting and or compression. www.thatcorp.com Look at application notes.

 

[henrybot]

Thanks for your help. I think I will kick this idea around a bit. Just muting works fine for the commercials, but that's only half the problem. We have a DVR and it seems like when we watch recorded TV (and skip the commercials, woo!), if we turn it back to live TV and it's on a channel that is louder than whatever we recorded from, we wake up the kids, as well as the neighbor's kids. Blech

 

[jumides]

audio schematec compressor

http://www.silonex.com/audiohm/compressor.html

 

[codescott]

What I have wanted to solve the problem of varying volumes on different cable channels is... a circuit that would remember volume levels for each channel and automatically use it when you switch to that channel. Perhaps the circuit could remember *two* volumes for each channel: one for the program and one for the commercials. Then you could use a single button to switch between these. Just a thought.