sndfile1='C:\Users\Max\Documents\Scilab\Photosynthesis_11k_32b.wav';
[wav1 Fs bits]=wavread(sndfile1);

wavwrite(wav1,Fs,16,'C:\Users\Max\Documents\Scilab\Photosynthesis_11k_16b.wav');
wavwrite(wav1,Fs,8,'C:\Users\Max\Documents\Scilab\Photosynthesis_11k_8b.wav');