Hello,
I have to transcribe three little organ pieces by ear and tried to get some help by our modern time tools - but I failed.
One example: there is a site https://notagen.ai/
If I choose the “Convert Audio” tab, it seems every audio upload gives an error message “unable to upload” “upload failed”.
I changed the audio format to .wav and also tried different mp3 encoding rates, no success.
Has anyone tried something similar?
I even bought some credits, as I thought it might help 
At the same time I feel embarrassed, as I could also just walk to the piano and check the chords aurally.
This is the file:
I tried Songscription for a short piece and got a good result. I think Scoring Notes also had a write up about klang.io.
Just dropped an mp3 in to test the first 20s (piano intro). It got all the pitches exact but rubato tripped it up rhythmically - really good, workable output though.
For something as clear and as simple as the audio file you posted, Transcribe!'s View / Show Note Guesses feature will get them almost perfectly. You may have to weed out some overtones, but this seems pretty straightforward to me. I would just transcribe it yourself and check pitches against Transcribe’s spectrum whenever in doubt.
