Thanks Rick

I just emphasize it. to be clear.

Tal

-----Original Message-----
From: pic microcontroller discussion list [mailto:PICLIST@MITVMA.MIT.EDU]On
Behalf Of Rick C.
Sent: Monday, April 12, 2004 1:20 PM
To: PICLIST@MITVMA.MIT.EDU
Subject: Re: [EE]: Stereo to mono mixer


We that have responded understand your dilema. You will not destroy your
discrete stereo with the passive resistor method. The stereo output
impedances,
are typically 10k although I believe they are a good bit lower. I repeat,
you
will *not* mar the quality of the stereo. That's the reason for the
resistors.
They passively sum the audio together. The resistor to ground simply
provides a
low mono impedance that reduces crosstalk. I do what you are trying to do in
many instances at home and at the radio station I engineer at.

Use the following:
http://www.pic101.com/pix/MIX.GIF

Rick

Tal wrote:

> Hello and thanks for the help
>
> To many times I do the same error and ask a question with some lack in
> details.
>
> I have a stereo satellite receiver and a stereo TV and a mono video
> cassette, so I want to be able to enjoy watching/listening in stereo but
> record in mono but have both L+R lines. I never do that before and it look
> to me if I use 2 resistor in series to join the stereo I will destroy the
> stereo signal.
>
> I know when you want to separate a dc sources or join them you can use a
> diode/s but in this case it looked to me to distorted and not acceptable.
so
> AC signal give you an headache... furthermore you don't want to kill the
> sound.
>
> I think I will adopt the buffer idea and try it.
>
> Thank you all for you help!
>
> Tal
>
> --

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