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yes, it is very easy because the machine can do it for you. Anyway, interesting application. How is the sound compare to differential opamps? why don't you use opa2134 that is very common audio codec output driver. I design it many years ago, and it is the first time I heard that someone use it...
your output stage is not fast enough to handle the fast large signal. To improve it, you can improve the output stage and the feedback network. The large input current is due to saturate of the bipolar input stage. For long run, you will destroy the opamp.
Re: AUdio Problem: LM833 Bridge amp serious instability (?) problem. Need Help :-(
your output stage have problem. goto find some good class AB output stage
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