Thanks Daniel, that works! Plus using soundarray should be faster than first converting to raw.So far I don't need to cache, but rollback netcode demands lots of CPU so I suspect I probably will end up optimizing this to improve robustness vs lag.A pity mixer won't let you start Channels partway through a Sound, as then there'd be no CPU cost.On Wed, Jul 14, 2021 at 9:15 AM Daniel Foerster <pydsigner@xxxxxxxxx> wrote:Instead of using the raw sound binary data and winging the slice, I'd recommend throwing things into a sndarray.def clip_sound(sound, start_time):freq = pygame.mixer.get_init()[0]offset = round(freq * start_time)arr = pygame.sndarray.array(sound)clipped = arr[offset:]return pygame.sndarray.make_sound(clipped)It would be worthwhile probably to cache the frequency and the converted array and only do the slice + flip back to Sound but that's premature optimization right now.On Wed, Jul 14, 2021, 03:15 Jasper Phillips <jasperisjaded@xxxxxxxxx> wrote:Alas, that is precisely what I did:def clipEffect( effect, startTime ):
raw = effect.get_raw()
rawStart = int( len(raw) * startTime / effect.get_length() )
return mixer.Sound( raw[rawStart:] )Depending on what sound effect I play the code either:- Works fine!- Horribly distorts the audio, though the original Sound plays fine...
Hi Jasper. Try the fourth answer here, by Ted Klein Bergman.
On 7/13/2021 4:24 PM, Jasper Phillips wrote:
I'm working on a networked action game with rollback netcode, and so I need to play sound effects starting an arbitrary amount of time from the beginning of the file so they sync up with game events.
pygame.mixer.music does this via set_pos()... but apparently there's no corresponding method when playing effects directly via a Channel. Unfortunate, as I need to use Channels!
The best I've come up with is to use Sound.get_raw(), trim the starting bytes off then, create a new Sound. But this fails several different ways, I'm guessing because I'm arbitrarily slicing the bytes and there's some format details I don't know.
Does anyone have any tips for hacking raw Sound data, or perhaps some better approach?
-Jasper