On 06/29/2010 09:38 PM, Anthony Minessale wrote:
you either have to decode them and merge them together by adding the samples or know some kind of dsp trick to do it while its encoded. There isn't really a DSP trick you can use. You could use a 64k entry look up table, but otherwise you decompress the A-law, add with saturation, compress to A-law and send it.
Steve
On Mon, Jun 28, 2010 at 4:34 AM, Achim Stamm <stamm@lyth.de <mailto:stamm@lyth.de>> wrote:
Hello!
I have following problem:
I get 160 Bytes Audio data (Format PCM A Law) from a Free Switch Session and save the data in a byte vector. At same time i get 160 Bytes Audio data (Format PCM A Law) from an external program and save the data in a byte vector. I want to merge the two audio data like a conference FreeSwitch Session mixed them. Can I use a Free Switch audio - Merge (C ++) Function ? How does Free Switch merge Audio Data in Conference mode ?
regards
Achim Stamm
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