Questions about using esp32-s2 with flash memory and DAC.

[warpigs330]

I am wanting to use the ESP32-S2 with a common w25q128 flash chip, which is straightforward enough. I also want to use a DAC7554 quad 12 bit dac. I need the output of this dac to be smooth and update regularly, as it will be used in analog synthesizers for things like volume control, so it needs to be able to update the dac at close to high audio rates. I assume this shouldn't be an issue using the same SPI lines for the dac and flash? Also a totally unrelated question, I don't have any need for the wireless connectivity, how should I deal with the antenna pin on the s2 chip? Thanks a bunch for any help y'all can provide, I am just getting started learning esp32.