Way to know the actual musical notes about dali HOT 3 CLOSED

Hello Gaurav,

Thank you for your interest in DALI. About your demand. Yes, it's pretty easy to retrieve the notes information you are asking for. Let's start with the info we have:

entry = dali[uid]  # where uid is a unique id
notes = copy.deepcopy(entry.annotations['annot']['notes'])
print(notes[0])
{'text': 'some text',
 'freq': [523.2511306011972, 523.2511306011972],
 'time': [0.7719999999999999, 1.0719999999999998],
 'index': 0}

The freq key contains the note information in frequency. In the note level you have the same value for the two elements in the list. This is because internally I use a recursive function for transforming the horizontal level to vertical (and viceversa) that requires the same structure for each granularity level. Just take the first one.

If you want to find the musical note just transform the freq into MIDI notes as follow:

 def freq2note(freq):
    return np.round(12 * np.log2(freq/440.) + 69).astype(int)

Here's a example:

for i in notes:
    i['freq'][1] = freq2note(i['freq'][0])  # I stored in the second element in order to keep the vertical2horizontal functionality but feel free to store wherever you want

If you really want the note as you describe ('A', '#A', etc.), just create a hash table with the correlations as in here

Finally, keep in mind that there are some issues with the note information and sometimes they are wrong. We are working to solve these problems and there will be a new version of the dataset with these issues solved soon.

from dali.

Thank you @gabolsgabs !

from dali.

Hi,
Thank you for the wonderful dataset.
I found that the annotatioms of 'notes' missing through entry.annotations['annot']['notes'].
I follow the tutorial, and execute the code to entry.annotations['annot'], then the variable become entry.annotations['annot']['horizontal'], maybe some errors in my codes, could you give the executive processing in details.

Thanks,
Lin

from dali.