On 11/17/05, <b class="gmail_sendername">voipwala hindustani</b> <<a href="mailto:voipwala@gmail.com">voipwala@gmail.com</a>> wrote:<div><span class="gmail_quote"></span><blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">
But inside asterisk AST_FORMAT_SLINEAR is assumed to be of 8000Hz
sampled voice. But in my case it is 48000Hz sampled.</blockquote><div><br>
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You need to do a thing called decimation (or downsampling). The easiest
way is to make the 48kHz signal go through a first order low-pass
filter with cutoff frequency at 4kHz and then collect every 6th sample.
You can then assemble the new stream as signed lineat at 8kHz.<br>
<br>
Carlos<br>
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