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Use free Voxengo plugin called SPAN to analyze the frequency of your kick sample.
Note that for Logic Pro you should download the AU,AAX package, not VST.
from https://www.voxengo.com/#:~:text=Note%20that%20for%20Logic%20Pro,caused%20by%20plugin's%20own%20bug.
![](https://www.notion.so/image/https%3A%2F%2Fs3-us-west-2.amazonaws.com%2Fsecure.notion-static.com%2Fa53b3a19-0913-4d67-a98b-a41007ecbf5f%2FScreenshot_2020-10-24_at_15.03.51.png?table=block&id=4a4980d2-4ad1-4a2b-8098-905ce3c3fb99&cache=v2)
In my case, the book (Attack p12) told me they thought the fundamental note was A#... but to me the peak looked more like a Cā¦ a whole two semit-tones up! I had to agree that the bassline sounded better when tuned to A# rather than C, but I couldn't see why they concluded it was A#.
To me, the peak looked further to the right, more like C. This is like the image in the book:
![](https://www.notion.so/image/https%3A%2F%2Fs3-us-west-2.amazonaws.com%2Fsecure.notion-static.com%2Fb65ab479-ae77-42a6-a942-31ef189d21b5%2Flooks-like-c.png?table=block&id=2ed3bad0-2814-493b-afd1-c0614b043b0a&cache=v2)
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What helped me was clicking settings and turning grid size up to 16,000 or 8,000 from ~2000 AND increase the average time all the way up to 10,000.
![](https://www.notion.so/image/https%3A%2F%2Fs3-us-west-2.amazonaws.com%2Fsecure.notion-static.com%2F0207daf3-c757-4225-aa60-02dbec0c23e2%2Ffound-a-sharp.png?table=block&id=d55bcfa5-c0e7-48e0-bb2a-e4e737d0b842&cache=v2)
Now I could re-assure myself that A# is the lowest note.
Note, if grid size is high and average size low, I could almost convince myself it was A natural:
![](https://www.notion.so/image/https%3A%2F%2Fs3-us-west-2.amazonaws.com%2Fsecure.notion-static.com%2Ff66e55fc-2013-4a35-a112-22feec39de3a%2Fis-it-a.png?table=block&id=009d4e51-485b-41bb-89e5-c36200f6ef65&cache=v2)
InTheMix has a video example at 8'50"
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![](https://www.notion.so/image/https%3A%2F%2Fs3-us-west-2.amazonaws.com%2Fsecure.notion-static.com%2F06c56f7d-a4d4-40a1-a269-6229f3a3965b%2FUntitled.png?table=block&id=4a6ccd15-7005-4535-af65-1e0aeeb10896&cache=v2)
Mark's impression
I found it tough to trust the graphic. Depending on which way I dial the resolution (grid size), average time and smoothing, I can manipulate the graph into telling me the fundamental note is anything from an A all the way to a C.
More reliable was to actually trust my ear, using CMD-Click, quickly trying with and without a narrow filter.
As per this video:
Chile CMD-clicking, I can change the width of the
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