
Dear Experts,
I have a PCM file Byte array , 16 bits , 8KHz sample rate , signed , Mono. I need to increase the volume of this data eg by 3 times current volume. My approach is :
1 convert this byte array of single ( samples are 16 bits so each 2 bytes will be one "Int16" number
2 multiply this value by 4.
4 covert this number back to bytes
5save to byte array.
Is this approach the correct & fast one . or you have another ideas.
Thanks



Your multiplier in step 2 is wrong... You'll want to calculate a 4.5 decibel increase to come up with the correct one. You only have to calculate it once.
Try looking on $SEARCH_ENGINE for "PCM amplitude to decibels" for the appropriate formula.
I'd also recommend looking at WaveBuffer for a simpler way to do steps 1, 4 & 5.



Dear ioctlLR ,
Great and simple. Thanks man. really appreciated.

