## Error, (in readbytes) WAVE Error: unexpected end o...

Hello there, my first time posting in this forum and using Maple, so sorry if I make some mistakes.

I'm trying to read a wav audio file, but there's this weird error that I can't understand :

```with(AudioTools);

[Audio, Clip, Convolution, Create, Duration, Extract, FormatFromName, Formats, Modulate, Normalize, Play, Preview, Read, Record, Resample, Scale, ToMono, ToStereo, Write]

Error, (in readbytes) WAVE Error: unexpected end of file

```

Do you know what it can mean ? I'm sure it's a wave file, so I don't really get it

## Spherical wave reflected from plane...

Hi all,

I am generating a sphere with increasing radius that interacts at some point with a plan, just like this:

I would like to find a way to make the sphere "wave" (I agree this is not a wave...) reflected by the plan as in a mirror.

How could I do that ?

Thanks a lot for your help.

B

## Problem with wave equation...

I am trying to find a general solution to the 1D-wave equation

Eq1:=diff(u(x,t),t\$2)=diff(u(x,t),x\$2);

pdsolve(Eq1,HINT=f(x)*g(t)); # Hinting pdsolve gives general solution using separation of variables

pdsolve({Eq1,u(x,0)=f(x),D[2](u)(x,0)=g(x)}); # without HINT and using intial conditions, I get travelling wave solution

pdsolve({Eq1,u(x,0)=f(x),D[2](u)(x,0)=g(x)},HINT=f(x)*g(t)); # Now when I try to use hint and ICs both, pdsolve return nothing.

I want to use separation of variables to find solution to the wave equation.

Any comment?

Thanks

## complicated wave equation ...

now the equation is

d2u/dt2-(2*d2u/x2)+d2u/dxdt=0

initial condition: u(x,0)=1-(xsign(x)), abslute x<1,0 otherwise. Assume sign(x)=-1 for x<0, 1for x>0

Ut(x,0)=cos(pix), bslute x<1, 0 otherwise , he didnt give any B.Cs

so I would like to know the analytical and numerical sols, and plots for the wave at t=2,4

for Numerical:   delta x=0.1, delta t=0.025, range 0..4

## how to plot this traveling wave...

U(x,t)= 2/3f(x+t)+1/3f(x-2t)+(1/3pi)(sin(pi(x+t))+(1/3pi)(sin(pi(x-2t)),

f(x)=1-x,abslutex<1, zero otherwise

## Numerical sol 2nd order pde...

d2u/dt2-(2*d2u/x2)+d2u/dxdt=0

initial condition: u(x,0)=1-x, abslute x<1   Ut(x,0)=cos(pix), bslute x<1

B.C U(-4,t)=U(4,t)=0,   delta x=0.1, delta t=0.025, range 0..4

## Use of imported DLL...

Hi,

I'm trying to get a hold of using DLL with Maple at the moment.

Just to give you some background informations.

[code]

#include

namespace WAVEFUNC
{
class
{
public:
...

## Plotting wave regions in 3D...

Dear Maple users

I know how to plot surfaces in 3D. However now I have a special task: I want to plot a piece of a solid region in 3D, more precisely a transverse or logitudinal wave. I wonder if there is an easy way to do this in Maple? Any hint will be appreciated!

Regards,

Erik