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</o:shapelayout></xml><![endif]--></head><body lang=EN-US link=blue vlink=purple><div class=WordSection1><p class=MsoNormal>Hello,<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>I am using gstreamer (0.10.32) pipeline proprietary src element + rate converter element + alsasink element to play raw audio received by my proprietary source.<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>The clock to alsa driver is provided by audio rendering DSP and corresponds to 44.1KHz alsa sample rate rate setting..<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>When I need to switch to another source (out of mu pipeline), following is done in my software<o:p></o:p></p><p class=MsoListParagraph style='text-indent:-.25in;mso-list:l0 level1 lfo1'><![if !supportLists]><span style='mso-list:Ignore'>-<span style='font:7.0pt "Times New Roman"'> </span></span><![endif]>Pause the playing gstreamer pipeline<o:p></o:p></p><p class=MsoListParagraph style='text-indent:-.25in;mso-list:l0 level1 lfo1'><![if !supportLists]><span style='mso-list:Ignore'>-<span style='font:7.0pt "Times New Roman"'> </span></span><![endif]>change the clock from 44.1Kz to 8 KHz as needed by new source. The new source directly pumps audio to DSP through another channel<o:p></o:p></p><p class=MsoNormal>When I need to switch back to my pipeline, following is done<o:p></o:p></p><p class=MsoListParagraph style='text-indent:-.25in;mso-list:l0 level1 lfo1'><![if !supportLists]><span style='mso-list:Ignore'>-<span style='font:7.0pt "Times New Roman"'> </span></span><![endif]>change the clock back from 8KHz to 44.1Kz. <o:p></o:p></p><p class=MsoListParagraph style='text-indent:-.25in;mso-list:l0 level1 lfo1'><![if !supportLists]><span style='mso-list:Ignore'>-<span style='font:7.0pt "Times New Roman"'> </span></span><![endif]>Play the pipeline<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>Now, audio from GStreamer to alsa mixer and DSP is delayed by 10-12 seconds.<o:p></o:p></p><p class=MsoNormal>Subsequently, every pause and play operation delays the audio pause and play by 2-3 seconds. <o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>I tried by keeping clock at 44.1 KHz during source switching and behavior is normal (no delays).<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>What might be going wrong and how can I solve this problem.<o:p></o:p></p><p class=MsoNormal>Frequency switching is something I cannot avoid.<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>Kindest Regards.=,<o:p></o:p></p><p class=MsoNormal>Salim<o:p></o:p></p></div>
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