Change pitch and formant

Is it possible with praatIO? I didn’t find this in documentation.

[qo4on]

The best I found so far is PyRubberband. But it changes the pitch only and can’t change formants, I thought it should be a trivial thing, but I was wrong.

[qo4on]

Thank you very much for your answer! I managed to run your examples, but the quality of the output files is far from I expected. I took a file 03-01-01-01-01-01-01 changed a pitch +1 and a formant +100 cents in Melodyne and compared the result to PratIO. I used this code:

import os
from os.path import join

from praatio import kgio
from praatio import praat_scripts

path = os.path.abspath(join(".", "files"))
outputPath = join(path, "resynthesized_wavs")
if not os.path.exists(outputPath):
    os.mkdir(outputPath)

# File to manipulate
name = "03-01-01-01-01-01-01"
wavFN = join(path, name + ".wav")
mainKlaatFN = join(outputPath, name + ".KlattGrid")

# Wav to klaatgrid
# praatEXE = "/Applications/Praat.app/Contents/MacOS/Praat"  # Example for Mac
praatEXE = r"C:\Praat.exe" # Example for Windows
kgio.wavToKlattgrid(praatEXE, wavFN, mainKlaatFN, maxFormantFreq=3500,
                    pitchFloor=50, pitchCeiling=350)

# Increase formants by 20%
incrTwenty = lambda x: x * 1.2
kg = kgio.openKlattgrid(mainKlaatFN)

formantTier = kg.tierDict["oral_formants"]
subFormantTier = formantTier.tierDict["formants"]
for subTierName in subFormantTier.tierNameList:
    subFormantTier.tierDict[subTierName].modifyValues(incrTwenty)

outputName = name + "_twenty_percent_more"
klattFN = join(outputPath, outputName + ".KlattGrid")
outputWavFN = join(outputPath, outputName + ".wav")
kg.save(klattFN)
kgio.resynthesize(praatEXE, wavFN, klattFN, outputWavFN)

What can I do to make PratIO or ProMo results similar to Melodyne in terms of audio quality? I also tried parselmouth and get a lot of artifacts after formant shifting. I’m not sure why I can’t get the same quality with Praat.