https://www.youtube.com/watch?v=Dy8kZcGz98U
There were a few games (in later years) with speach/audio. But Robocop was one that stands in my memory for the good music.
https://youtu.be/yjrbcLm78I8?si=GMIqDdL31hq4ik72&t=87
Although tbf apparently that's done via the AY sound chip of the 128k, which is a lot easier than through the on/off beeper of the 48k since the AY can do digitized audio via CPU-driven volume modulation.
https://spectrumgamesuk.com/index.php?game=Meteor-Storm
I think it said "Meteor Alert!" or something similar, though the quality was terrible.
For high quality speech, you could get the Currah μSpeech! https://en.wikipedia.org/wiki/Currah#Currah_%CE%BCSpeech_for...
I swear there was one symbol it pronounced "flea bleep".
(And there was a "Get ready!" which I didn't remember)