What kind of chip can a person download sound from PC into
There are many sound and speech recording solutions, but amongst the easiest and most compact to use are the ISD ChipCorderIC's by Nuvoton. 

They have many variants but the simplest ones require little more than the IC to record and playback and can be microcontroller or PC controlled or standalone. The initial products had analog only interfaces, requiring recording f analog sound signals, but current offerings allow recording of either analog or digitised audio signals. Data storage / recovery rate and compression methods can be varies across a wide range allowing quality/duration tradeoffs. [I have used their ISD2500 devices in the past with good results. I have not used their digital recording capable parts but expect them to meet their claimed performance specifications equally well.]  

They say:


Nuvoton's ChipCorder® is a complete, single chip solution for voice and audio recording and playback. It is designed to offer the highest quality single-chip voice record/playback solutions for embedded applications. Non-volatile and highly integrated, they are ideal solutions for adding voice prompts, alerts, interactive menus, and voice memos to consumer, industrial and security products. Available pre-recording services make it easy to add voice to system design.




A good start to look at is their ISD15100 series with datasheet here

Application example here: