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Sir . . . . . . . 'po man on a . . . . . . Tightbudget . . . . .
That all depends upon the numbers that you feed back to us that are on that 14 pin IC chip.'
You provided a good close up but I am still not seeing its top numbers / I.D. .
If the audio playback is just a tune it is probably from a preprogrammed digital RAM mask deep with in the unit and with no access for modification.
HOWEVER if it is a voice recording chip, like you can find being used on premium greeting cards, that's certainly having a possibility for re recording.
They use a small flat piezo speaker which gives some intelligibility, but amazingly it is also used as a microphone during recording.
with an even more amazing audio response.
Thasssssit. . . . . .
73's de Edd