It sounds good.
If there are any newer op amps that are a DIRECT replacement for the NE5532 and TL072 op amps in this that would give added sound quality without screwing something up.
I found one posting in a board where a guy claimed he changed the NE5532 to the OPA2134 and noticed a real difference in a DBX compressor.
Hi,I'm not sure what you mean by "older" opa op ampsBut, Its a safe bet the opa2228 and opa2107 are very very clean and I would be hard pressed to find anyone that sits down and really listens do them, with anything bad to say about them. That if course taking for granted a circuit they were designed in. Whether or not they will work in your circuit - you never know. Try it out, hey they are free - give them a listen. I think the "characteristic" burr-brown sound isn't so much with the 2228 and 2107but decide for yourself.
I've tried them in many applications, especially consoles and converters. The 2211A/1612 just sounds a lot clearer, detailed, punchy, more real to my ears (=more transparent) than for example the 2227, 275, 2134. You can get those more recent chips for free from TI, too. Use a Brown Dog adapter for DIP applications.
Ouch, that AD opamp is expensive! Went to search on eBay, but 7,50eur each, man that's hefty.
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