Slew Rate limiting?

[WaveshapeIllusions]

Hey, I've got an odd question. How does one modify the slew rate of a differential amplifier? I plan on making a discrete opamp with a ridiculously low slew rate to make weird distortion noises. In this case, that means that I want to make it have trouble with the audio frequency range (perhaps as low as ~40 Hz) with P-P voltages of around one to two volts. Maybe slightly higher voltages.

The problem here is, I'm not entirely sure what affects slew rate. I believe it's the Miller cap in the circuit, but I'm not entirely sure.

I won't probably be running a sinusoidal waveform or a clean guitar signal into it. To make the circuit freak out sooner, the input guitar signal will first be heavily clipped to bring it to resembling a square wave.

[PRR]

> the Miller cap in the circuit

Yes.

[WaveshapeIllusions]

Thanks! It's good that it really is that simple. I'm thinking at least 1uF then, to limit it?

[PRR]

> I'm thinking at least 1uF

Depends entirely on circuit values and signal levels.