What sort of noise?this one has so much noise and the sound is unhearable
Missed a resistor label on the first schematic. What software are you using? Your colour scheme is nice to look at.There's only 2 sources of noise,
the Chip, and, to a far lesser extent, the Resistors.
Use one of these for each channel ........ LT1630IN8#PBF-ND ~$10.oo each.
Here are some useful Filter-Circuits that You can "Mix-n-Match" to get the Frequency-Response You need.
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as i said i did not draw the circuitWhat sort of a preamp is it meant to be?
It looks to be a 39kHz 2nd order low-pass filter to me followed by a gain of ten (and I would have reached that conclusion far more quickly if you had drawn an op-amp as an op-amp).
The LM833 is a particularly quiet op-amp, so if it's noisy then the op-amp is most likely not the problem.
Why don't you look at the circuits in the LM833 datasheet?
But what is it meant to do?as i said i did not draw the circuit
its from the officialLM833N Datasheet
You can check it out here
https://www.ti.com/lit/ds/symlink/lm833.pdf?ts=1654238192729&ref_url=https%3A%2F%2Fwww.google.com%2F
it is shown in the first page
what im trying to do is control the gain of an input signal (most likely RCA Connector ,since the circuit is not designed for balanced inputs) and then feed the signal into an amplifierBut what is it meant to do?
Or what were you hoping it would do?
i dont want to control a micThe schematic shows no supply voltage and no part number (rated voltage) for the zener diodes.
The first opamp is a second-order lowpass filter with a voltage gain of only 1. The second opamp has a voltage gain of only 10.
The first opamp should be fed from the low output impedance of an opamp, not from a microphone.
With such a low gain it should be VERY quiet.
Usually, a mic preamp has a fixed gain of 150 to 200 times then it feeds a volume control. The volume control is at the line-level input of a recorder or power amplifier.
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