I am trying to do a speech recognition system. In the aplay file I would like to conver the unsigned char buffer to a float buffer to be able to make comparisons the way I would like. The floats that I am getting after the conversion are these. How should I do the conversion from unsigned char to float array? thanks in advance.

819 -464604244644772930012428885483847680.000000 820 -542490915911345743841838949652758528.000000 821 -495758857691688295559156595670646784.000000 822 -480181610589352498484045935735209984.000000 823 -441239146465853748477054432634208256.000000 824 -376333296573780517983308202832297984.000000 825 -503547144523165508473277153076576256.000000 826 -485374263974618640302095603012206592.000000 827 -495758501164956981369637424722870272.000000 828 -433450265423157678580401923648651264.000000 829 -415277147190123267616207592952430592.000000 830 -425662216276168008459294146874572800.000000 831 -477585818686816398859299858518376448.000000 832 -394508395510877785555942372127277056.000000 833 -472393086073387742776912597697429504.000000 834 -482778551300245054941687119339323392.000000 835 -584029726534518193323939684778246144.000000 836 -511336897075649235277643191045586944.000000 837 -558067806486950226727430438640418816.000000 838 -513933085118997906224077235982172160.000000 839 -302397753578834695235772573852631040.000000

float* float_array;

while (rest > 0 && recycle_capture_file == 0) { size_t c = (rest <= (off64_t)chunk_bytes) ? (size_t)rest : chunk_bytes; size_t f = c * 8 / bits_per_frame;

if (pcm_read(audiobuf, f) != f) break;

float_array=(float*)malloc(f); memcpy(float_array,audiobuf,f); int z=0;

for(z=0; z<f/sizeof(float);z++){ printf("%d %f\n",z,float_array[z]); }

/*if (write(fd, audiobuf, c) != c) { perror(name); prg_exit(EXIT_FAILURE); }*/ count -= c; rest -= c; fdcount += c; }