Notes in MIDI output are different in python program compared to the demo website

[pulsar666]

Description: I'm experiencing an issue where the MIDI output generated by the basic_pitch library on my local machine has a lot of off notes. However, when I use the demo website, the notes seem to be correct. This appears to be similar to the issue discussed in #[126], but I'm still encountering the problem.

Environment:

• OS: Windows 10
• Python version: 3.11
• Basic Pitch version: latest
• TensorFlow version: latest

Steps to Reproduce:

1. Install the required packages:

   pip install basic_pitch[tf]

2. Use the following script to convert an audio file to MIDI:

   import os
   from basic_pitch.inference import predict_and_save
   from basic_pitch import ICASSP_2022_MODEL_PATH
   
   def convert_to_midi(audio_file, output_directory):
       print(audio_file)
       # Verify the file exists
       if not os.path.exists(audio_file):
           raise FileNotFoundError(f"File not found: {audio_file}")
   
       try:
           predict_and_save(
               audio_path_list=[audio_file],  # <input-audio-path-list>
               output_directory=output_directory,  # <output-directory>
               save_midi=True,  # <save-midi>
               sonify_midi=False,  # <sonify-midi>
               save_model_outputs=True,  # <save-model-outputs>
               save_notes=True,  # <save-notes>
               model_or_model_path=ICASSP_2022_MODEL_PATH,
               minimum_note_length=11,
               maximum_frequency=3000.0,  # Maximum Pitch
           )
       except Exception as e:
           print(f"Error reading or converting audio file: {e}")
           raise
   
   output_dir = 'output'
   convert_to_midi("E:/Data/pycharm_projects/azimuth-melody-extraction-v2/output_directory/test-audio.wav", output_dir)
   print(f"MIDI file is saved at {output_dir}")

3. Compare the MIDI output generated by the script with the output generated by the demo website.

Expected behavior: The MIDI output generated by the script should have the correct notes, similar to the output generated by the demo website.

Actual behavior: The MIDI output generated by the script has a lot of off notes.

Additional context:

• I have verified that the audio file used for testing is the same in both cases.
• The model path used in the script is ICASSP_2022_MODEL_PATH.
• This issue seems related to #[126] which is now closed, but the problem persists.

---

Would be great if anyone can tell me how to get the exact output that is produced by the demo website: basic pitch demo

[pulsar666]

anyone that can help with correct settings for the predict_and_save() that will produce the same output as the demo site?

[pulsar666]

I believe the python version is causing is. I tried with 3.10 and the notes do overlap with what is being produced by the demo site, although the pitch velocities are definitely different

[drubinstein]

Hi and thanks for your interest in Basic Pitch.

A few follow up questions:

• Are you ensuring that all the parameters on the website match what you are using locally
• When you say TF latest, which version do you actually mean? Basic-Pitch installs tf<2.16, i.e. less than latest

If you have an audio file you could share that'd also be great. It looks like the velocities in basic-pitch and basic-pitch-ts could be slightly different.