It can take a day or so to train a CNN model, or several minutes to create a profile, assuming that you have enough suitable samples. Fortunately it is possible to transcribe without prior training for a particular instrument. To illustrate this I have a single note played on a double bass (A octave 2).

To transcribe I set the options to No Profile and Constant Q Mapping.

Selecting Use FFT Profile Result only

The result is

Selecting Use Spectrogram Analysis Result only I get

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