Re: [pygame] Obtain actual volume of sample being played

[Wyatt Olson <wyatt.olson@xxxxxxxxx>]

Sweet!  I will play around with this.

Cheers

Forrest Voight wrote:
> sound = pygame.mixer.Sound('x.wav')
> array = pygame.sndarray.samples(sound)
>
>
> On Tue, Jul 15, 2008 at 3:16 PM, Wyatt Olson <wyatt.olson@xxxxxxxxx> wrote:
>   
> > How do you access the sndarray for a sound loaded from a .wav sample?  From
> > what I can tell, you can either create a Sound object from a .wav file, or
> > from a sndarray object, but I don't see how you can access the backing
> > sndarray from a .wav Sound...
> >
> > Sorry if I am missing something obvious.
> >
> > Cheers
> >
> > Forrest Voight wrote:
> >     
> > > You could access a sndarray and average the current portion of it. You
> > > could probably even use numpy to do  a fourier transform on it.
> > >
> > > On Tue, Jul 15, 2008 at 12:26 PM, Wyatt Olson <wyatt.olson@xxxxxxxxx>
> > > wrote:
> > >
> > >       
> > > > Hello,
> > > >
> > > > Does anyone know if it is possible to obtain the actual volume of the
> > > > sample
> > > > being played at a given moment?  This is not the same as getting the
> > > > volume
> > > > level which was set earlier, on either the sample or the channel.
> > > >
> > > > For instance, assume that I am playing a sample which starts at low
> > > > volume
> > > > (-70dB), increases to 0dB after 5 seconds, then fades out to -70dB again.
> > > >  If I play that sample at volume = 1.0, I would want to be able to return
> > > > an
> > > > approximation of the actual dB value at the given time.  For instance, if
> > > > I
> > > > were to query it at 0 seconds, I would get 0.000001; querying at 5
> > > > seconds
> > > > would return 1.0; querying at 7.5 seconds would give 0.5 or something.
> > > > Make sense?  I would want to have this controllable at the channel and /
> > > > or
> > > > sample level, not the mixer - I need to show each channel separately.  I
> > > > don't care about linear / logarithmic conversions or anything... I
> > > > essentially just need a number from 0 to 9 indicating very approximately
> > > > how
> > > > loud the sound is.
> > > >
> > > > I want this information to display semi-accurate VU / peak meter
> > > > information, based on actual samples.  This is for my slave software for
> > > > an
> > > > electronic drum set.  Currently I show VU information based on the
> > > > velocity
> > > > of a drum pad hit, which is decent, but it would be nice to use the
> > > > actual
> > > > sample information as well.
> > > >
> > > > I have looked through the documentation, and I don't think it can be
> > > > done,
> > > > but I figured I may as well submit this question to the gurus on teh
> > > > interwebs. 8-)
> > > >
> > > > Cheers
> > > >
> > > >
> > > >         
> >