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What is SAI "Error between selected"? (CubeMX bug?)

TDJ
Lead

‎2023-10-30 11:36 AM

Today I spent some time to fine-tune SAI clock to get standard 22.05kHz sample output rate.
However, I do not understand why CubeMX states that "Error between selected" is 0.22%.

What is "Error between selected"? Why this error is zero when selected frequency actually differs from the desired value by 0.05kHz? Am I missing something?

SAI3.png

 

SAI2.png

 

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TDJ
Lead
In response to Piranha

‎2023-11-01 03:09 AM - edited ‎2023-11-01 03:28 AM

@Piranha I totally agree, what I did was probably an overkill, but it was intentional. However, there are studies which indicate that some humans can tell 0.03% absolute frequency difference. Ofc, this is very rare, even among musicians. This topic is interesting in itself.

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