feat: implemented sine wave #18
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tekkac
requested changes
Mar 22, 2024
src/utils.cairo
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| break; | ||
| } | ||
| let t: u32 = ((num_samples_left - 1) / sample_rate_hz.into()).try_into().unwrap(); | ||
| let fp: FP16x16 = FixedTrait::new_unscaled((2 * (22 / 7) * frequency_hz * t), false); |
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Funny Pi Approximation, maybe orion has Pi as a const though.
src/utils.cairo
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| } | ||
| let t: u32 = ((num_samples_left - 1) / sample_rate_hz.into()).try_into().unwrap(); | ||
| let fp: FP16x16 = FixedTrait::new_unscaled((2 * (22 / 7) * frequency_hz * t), false); | ||
| let sample_value: u8 = fp.sin().try_into().unwrap(); |
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Here you need to scale the sinewave to fit the 8-bit bit depth as this returns 0_u8 for now.
https://en.wikipedia.org/wiki/Audio_bit_depth
(Probably something like 128*sin + 128)
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fixes #9