Re: [Sndobj-devel] PVA / PVS and 8 bit audiofiles

[<Vic...@nu...>]

What OS? The problem might be the RT output that is not working well in 8 bits. Try to make
the output always 16 bits, as it should not depend on the input.

Victor
----- Original Message -----
From: Ben Zonneveld <whi...@gm...>
Date: Monday, February 14, 2011 11:25 pm
Subject: [Sndobj-devel] PVA / PVS and 8 bit audiofiles
To: snd...@li...

> When trying to do some PVA / PVS stuff on a 8 bit mono audio file the only ouput i get is lots of distortion.
> The program I am working on can't use 16 bit samples because the program is for editing sounds from an 8 bit midi sampler.
 > 
> At this moment I'm a bit stuck.
> 
> I'm testing with the blurring example:
> #include <SndObj/AudioDefs.h>
> #include <stdio.h>
> 
> int
> main(){
>  int vecsize=DEF_VECSIZE;
>  int fftsize=1024;
 > 
>  int encoding=BYTESAM;
>  SndWave input("C:/Ableton Songs/Blunt Rips/Fairlight/GrandA4.wav", READ,1,8,0,0,DEF_VECSIZE); // 8 bit mono sample
> // SndWave input("C:/Ableton Songs/Library/Legs 1.wav", READ,1,8,0,0,DEF_VECSIZE); // 16 bit stereo sample
>   float    sr=input.GetSr();
> 
>  if ( input.GetSize() == 8 )
>  {
>         encoding = BYTESAM;
>  } else {
>         encoding = SHORTSAM;
>  }
> 
>  SndRTIO output(2, SND_OUTPUT,DEF_BSIZE,DEF_PERIOD,encoding,0,vecsize,sr);
 > 
>  HammingTable window(fftsize, 0.54f);
> 
>  SndIn in(&input,1,vecsize,sr);
>  PVA anal(&window, &in,1.0f,fftsize,vecsize,sr); 
> // PVBlur blur(&anal, 0.05f,vecsize,fftsize,sr);
>  PVS synth(&window, &anal,fftsize,vecsize,sr);
 > 
>  output.SetOutput(1, &synth);
>  output.SetOutput(2, &synth);
>  
>  
>  while(!input.Eof()){ 
> 
>    input.Read();
>    in.DoProcess();
>    anal.DoProcess();
> //   blur.DoProcess();
>    synth.DoProcess();
>     output.Write();
> }
> 
> return 0;
> 
> }
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Dr Victor Lazzarini, Senior Lecturer, Dept. of Music,
National University of Ireland, Maynooth