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hi on my device i can sample only at 32khz and want to use speex at 16khz so i need to down-convert the input signal by factor of 2. does anyone provide me a reference to some code that does that? are there any trick to do that? i tried to add to subsequent sample but the result was very bad. what are the requrment from a decimation filter for audio? thanks, nir -------------- next part

I've done something similar in Groovy/Java using Wave files. In my case I was downsampling from 16bit to 8bit. Here's the core of my conversion logic. def convertData(def inputStream, def outputStream) { boolean otherByte = false inputStream.eachByte { if(otherByte) { //invert high order byte int inverted = ((int)it) ^ 0x00000080 byte[] toWrite = new byte[1]; toWrite[0] = (byte)inverted outputStream.write toWrite otherByte = false } else otherByte = true } } Basica...