ARP2600 Style Preamp: Understanding and Reducing Noise
AUDIODiWHY posts:
I’m reaching the end of laying out clones and workalikes based on the classic ARP 2600 synthesizer.
It’s (almost) time to move on.
Not yet! Let’s redo the 2600’s preamp with revision 2 of a workalike–improving upon the last one–since revision one is noisy and sounds, well, just OK.
From a noise standpoint, how to determine which op amp is right for a project? As always, it depends. In audioDiWhy, we do a lot in the 100-1000hz range, so 1/f noise is not our friend. But the comparison chart here shows that the venerable TL072, that I used for this build, and is my go to op amp for a lot of what I build, does not compare well, in terms of noise to many other higher performance op amps.
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