Re: [pygame] seeking in a .WAV with pygame.mixer.music? and "pynudge"

[andrew baker <failrate@xxxxxxxxx>]

That's interesting work.  How do you access the actual sound data to
do transformations.

On 7/14/05, James Hofmann <jwhinfinity@xxxxxxxxx> wrote:
> I wrote a program with pygame that lets the user
> record beat markings while a song plays, so that an
> exact beat for songs recorded without stable
> timekeeping can be used in music games such as
> Stepmania.
> 
> The first version of this worked reasonably well - I
> slowed down the music to around 70-80% speed first
> with Audacity, then ran the program with the slowed
> down file. The timings were multiplied back to normal
> and converted to BPMs, and the song played well
> in-game - except for the parts where I made mistakes
> recording, and how note movement would slow and speed
> up with each beat. (the latter being more of a game
> problem than my problem)
> 
> For the revamped second version, "pynudge," I'm giving
> visual indication of the beats like in an actual music
> game, and making it so that you can nudge around each
> beat manually and re-record sections. Things have gone
> well so far, but the latter parts of nudging and
> re-recording require me to start the song in the
> middle.
> 
> The problem I've encountered in doing this is that
> pygame(and possibly SDL_mixer) doesn't let you use the
> play function's startpos parameter with a .WAV file.
> It's apparently unsupported. I'll admit that I haven't
> tried loading an MP3 or OGG yet, which the
> documentation says is explicitly supported.....but
> even if that works it seems like a pretty arbitrary
> restriction; it would force me to re-encode my
> slowed-down song again.
> 
> I've looked at pymedia as well, but I don't see a
> tutorial or code for it that says "this is exactly how
> you seek through some audio."
> 
> 
> 
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-- 
Andrew Ulysses Baker
"failrate"