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add notes from april 2nd/3rd

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Vineet K 2024-04-03 23:35:16 -04:00 committed by kar
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@ -31,3 +31,11 @@
is not a linear relationship
- the speaker's datasheet has a graph of this which can be used to
adjust the speaker's volume at the problematic frequencies
## 2024-04-03
- other speakers sold on DigiKey have more stable frequency response
graphs where the volume does not fluctuate very much compared to the
speaker included in the kit
- those speakers however use sine waves instead of square waves, so our
first step should be focused on figuring out how to send sine waves at
certain frequencies, perhaps with fast PWM