Steps to reproduce:

• Play attached wav file with multimedia\player example
• Note it stuttering compared to .mp3

Here is a simple example code which uses QMediaPlayer to play an audio file:

import sys
import time

from PySide6.QtCore import QUrl, QCoreApplication
from PySide6.QtMultimedia import QMediaPlayer, QAudioOutput
from PySide6.QtWidgets import QApplication

app = QApplication(sys.argv)

#create a QMediaPlayer instance
player = QMediaPlayer()

#set the URL of the audio file to play

url = QUrl.fromLocalFile(r"E:\PyCharmProjects\papagayo_clean\Tutorial Files\lame.wav")
url = QUrl.fromLocalFile(r"E:\PyCharmProjects\papagayo_clean\Tutorial Files\scared.wav")
player.setSource(url)
audio_output = QAudioOutput()
player.setAudioOutput(audio_output)
while not player.mediaStatus() in [QMediaPlayer.MediaStatus.LoadedMedia, QMediaPlayer.MediaStatus.BufferedMedia,
                                   QMediaPlayer.MediaStatus.BufferingMedia]:
    print(player.mediaStatus())
    QCoreApplication.processEvents()
    time.sleep(0.1)

#play the audio file
print(player.mediaStatus())
print("Playing: {}".format(url.toString()))
player.play()

#connect to the stateChanged signal to exit the program when the audio has finished playing
player.playbackStateChanged.connect(lambda state:
                                    QApplication.quit() if state != QMediaPlayer.PlaybackState.PlayingState else None)

#start the application event loop
sys.exit(app.exec())

Attached are 2 files, for the same sound. 
If you change the code so that the mp3 loads then it will play fine, but if you play the wav file then it will stutter.