I'm looking for sound recording chips that is capable of playing sounds up to 8 kHz that are similar to ISD1730PY-ND. However, I had no luck. I am thinking of using something like a 555 timer or any other chip that can generate clean frequencies and play it when I want it to be enabled. However, how hard is it to have such a chip dictate the speaker frequency, especially when this thing is playing very loud (similar to P.A. system)?