Arduino uno audio delay project

i think one of these would be a good ram for this project, but i dont really know... im gonna have to do research on them and on ram chips... i heavent really used them before. maybe you could introduce me or give some links to where i could read about them?

https://www1.elfa.se/data1/wwwroot/assets/datasheets/fm24c64b_eng_ds.pdf
https://www1.elfa.se/data1/wwwroot/assets/datasheets/zsLyontek_SRAM-LY6264_EN.pdf