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small fixes

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This commit is contained in:
Felix Roos 2023-07-22 09:26:34 +02:00
parent cec7b90631
commit 92d574605e
1 changed files with 4 additions and 4 deletions
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8
website/src/pages/understand/pitch.mdx
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@ -24,7 +24,7 @@ The Hz number is the frequency of the pitch you're hearing.
The higher the frequency, the higher the pitch and vice versa. The higher the frequency, the higher the pitch and vice versa.
A pitch occurs whenever something is vibrating / oscillating at a frequency, in this case it's your speaker. A pitch occurs whenever something is vibrating / oscillating at a frequency, in this case it's your speaker.
The unit **Hz** describes how many times that oscillation happens per second. The unit **Hz** describes how many times that oscillation happens per second.
Our eyes are too slow to actually see the oscillation on the speaker, but we can [see it in slow motion](https://www.youtube.com/watch?v=CDMBWw7OuJQ&t=5s). Our eyes are too slow to actually see the oscillation on the speaker, but we can <a href="https://www.youtube.com/watch?v=CDMBWw7OuJQ" target="_blank">see it in slow motion</a>.
<Box> <Box>
@ -40,7 +40,7 @@ In Strudel, we can play frequencies directly with the `freq` control:
## Frequency vs Pitch Perception ## Frequency vs Pitch Perception
Maybe you have already noticed that the <span style="color:#3b82f6;">frequency slider</span> is "lopsided", Maybe you have already noticed that the <span style="color:#3b82f6;">frequency slider</span> is "lopsided",
meaning the pitch changes more in the left region and less in the right region. meaning the pitch changes more in the left region and less in the right region.<br/>
To make that more obvious, let's add a <span style="color:#eab308">pitch slider</span> To make that more obvious, let's add a <span style="color:#eab308">pitch slider</span>
that controls the frequency on a different scale: that controls the frequency on a different scale:
@ -93,7 +93,7 @@ In Strudel, we could do that with `freq` like this:
tune={`freq( tune={`freq(
"0 4 7 12" "0 4 7 12"
.fmap(n => 440 * 2**(n/12)) .fmap(n => 440 * 2**(n/12))
).piano()`} )`}
/> />
Of course, this can be written shorter with note, as we will see below. Of course, this can be written shorter with note, as we will see below.
@ -119,7 +119,7 @@ Typically, 440Hz is standardized to the number 69, which leads to this calculati
The yellow number is now a MIDI number, covering more than the whole human hearing range with numbers from 0 to 127. The yellow number is now a MIDI number, covering more than the whole human hearing range with numbers from 0 to 127.
In Strudel, we can use MIDI numbers inside `note`: In Strudel, we can use MIDI numbers inside `note`:
<MiniRepl client:visible tune={`note("69 73 76 81").piano()`} /> <MiniRepl client:visible tune={`note("69 73 76 81")`} />
## From MIDI numbers to notes ## From MIDI numbers to notes