pygame.mixer.Sound play speed doesn't work with frequency setting when playing the bytes array cut from wave module (2597)

[GalacticEmperor1]

Issue №2597 opened by plr0201 at 2021-05-22 04:51:02

import wave
from pygame import mixer
bgm = wave.open('cf.wav', 'rb')
bgm.setpos(345778)
freq = bgm.getframerate()
fragment = bgm.readframes(500000)
bgm.close()
mixer.init(frequency = freq)
sound = mixer.Sound(buffer= fragment)
sound.play()

Code works good, however, the play speed is significantly lower (~0.6-0.7?) than it needs to be. I wonder why. Look forward to help!

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Comments

# # plr0201 commented at 2021-05-26 05:18:22

The reason I used wave instead of mixer to get the bytes array is that wave can precisely operate the samples/frames like in audacity. The len(raw_array) in mixer.Sound doesn't match the frames in audacity.

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# # plr0201 commented at 2021-05-26 14:44:52

No, it is slow for most if not all music. for the same wave file, the byte length for wav is longer than pygame.mixer... wonder why? If only wave could play audio...