[sdiy] RE: cross-fades (was ...)

[David Moylan]

You can also tie the wiper to ground

in1 --\/\/\/\-----+------\/\/\/\/------+---------to summing amp
                   |	               |
                   <                    |
                   >                    |
                   <------Ground        |
                   >                    |
                   <                    |
in2 --\/\/\/\-----+------\/\/\/\/------+


Hope the ASCII art makes it through.

Dave


Neil Johnson wrote:
> Hi,
> 
> Ingo Debus <igg.debus at t-online.de> wrote: 
>> Am 15.01.2009 um 23:58 schrieb mark verbos:
>>
>>>> Passive approach requires a ganged pot.
>>>>
>>> or run both signals through resistors and after them have a single  
>>> pot with it's ends on the signals, post resistor and wiper to  
>>> ground. After this section, the two signals can be passively  
>>> combined with 2 resistors. It would help to combine them with an  
>>> opamp stage.
>> Can't you just feed the two signals into either ends of a pot and  
>> grab the result from the wiper?
> 
> This only works if the two source impedances are zero.  Otherwise you'll never completely select one or the other source at the ends of pot travel.
> 
> Neil
> --
> http://www.njohnson.co.uk
> 
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