Eurorack noise circuit, and headphone amplifier breadboard

In this video we are going to add a common feature that you see on sample and hold modules, a noise source. In part two of this video. A headphone amplifier so that you can actually hear all the sounds you are making.
Part 1:
• Breadboarding a Eurora...
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[@martingerken7094]

How important is the choice of opamp? Could eg. a 741 do?

[@Recklessexperimentationaudio]

For the noise source, op-amp choice is not important at all, 741 should be fine. For the headphone amp, I would recommend and LM324 or another op-amp that can drive some current. Or you can boost the power with external transistors, see my reverb video for an example.