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Recent content by comlogical

  1. C

    Mixing 3 Line Level Inputs to 2.

    Purchased a second dual Op-Amp IC to see if the Op-Amp is to blame for the crossover. I intend on (time permitting) using one Op-Amp per IC.
  2. C

    Mixing 3 Line Level Inputs to 2.

    I understand that in theory, an active mixer creates a "canceling" current that prevents crosstalk, but I don't understand it at the electron flow level. According to the referred link (**broken link removed**) the purpose of an active mixer is to prevent crosstalk through this "Virtual Earth"...
  3. C

    Mixing 3 Line Level Inputs to 2.

    Hold off on your thoughts for a bit. I need to start over on my circuit because I have made so many alterations during the testing that I have lost some certainty in my contacts. I am going to rebuild the circuit to ensure that each test that I previously made was "pure". During this I hope to...
  4. C

    Mixing 3 Line Level Inputs to 2.

    For clarification... Alex, the schematic image you have posted is one of the trials I tested with. In addition I tried your previous schematic which was slightly different in that the "Common Channel" had a series parallel set of resistors. I tried it just to see if it changed anything. To be...
  5. C

    Mixing 3 Line Level Inputs to 2.

    Thanks Alex for your baseline. I unfortunately don't have the equipment nor the understanding to make full use of what you have detailed. I was able to take advantage of the overall schematic concept to ensure that I was on the right track. I attempted the circuit using both my original 330Ohm...
  6. C

    Mixing 3 Line Level Inputs to 2.

    After reading through the suggested link (multiple times) I built their concept with my modifications as outlined below in ASCII Art. I built the circuit using a TL082, a dual JFET Op-Amp. Just to reiterate, the objective is to take three separate audio signals, mix one of the three ("common...
  7. C

    Mixing 3 Line Level Inputs to 2.

    Read and acknowledged post. It'll be a while until I can make the changes and test them.
  8. C

    Mixing 3 Line Level Inputs to 2.

    Greetings, I am looking to take the 5.1 analog output from a PC Sound card and "mix" the center channel into the front channels before being sent into a four channel amplifier Integrated Circuit. The current setup is as follows (excluding the rear satellites and sub channels): Each Front...
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