Hi! I am designing an audio mixer for my stereo at the moment, but have run into some problems. Maybe somebody here can help me: Can anyone here provide hints or schematics for using the Philips chip TDA1074A as a channel fader? Alternatively, suggestions for other circuits that will do the same would also be helpfull... Here is a description of what I am trying to do: To avoid problems with the "cheapo" potentiometer sliders I want to use for the faders, I wanted to let a TDA1074A do the fading and the potentiometers just deliver a control voltage. >From the information in the datasheet, this task is just what the TDA1074A is designed for, but I am having troubles getting it to work. At the moment, it is connected in the manner suggested in the data sheet, but the control behaviour is quite different from what I expected: I can't fade a signal down to zero (the whole lower half of the fader range has only little effect on the signal), while there is a steep rise of signal level at the upper end (plus there is a noise when fading to the upper end, but that might be caused by the potentiometer). What I'd like to get is a logarithmic or linear curve from zero (- infinite dB) to 100 %. Bye and thanks in advance, Hannes ----------------------------------------------------------------- To stop getting this list send a message containing just the word "unsubscribe" to [EMAIL PROTECTED]
