search for: pcmvalu

...odec. I think the data is signed. My goal is to construct a db scale(ppm) to display the volume while playing just like the old tape deck. The original amplitude is expressed in turn of voltage. I have no idea how to coverted it in digital form. I saw a formula like p= 1/n * sum(x=0 to n) (pcmvalue/2 to power of (num of bits))^2 and signal level L=10 log p + C. I also noted I need to add a constant for a or mu law coded pcm. Do I need to add any for linear pcm? How do I convert this to peak power meter or this is it? Please let me know if there is a place I can ask or find more rel...