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</o:shapelayout></xml><![endif]--></head><body bgcolor=white lang=EN-GB link=blue vlink=purple style='word-wrap:break-word'><div class=WordSection1><p class=MsoNormal><span style='font-family:"Segoe UI",sans-serif;color:#1F497D;mso-fareast-language:EN-US'>Hi Mike,<o:p></o:p></span></p><p class=MsoNormal><span style='font-family:"Segoe UI",sans-serif;color:#1F497D;mso-fareast-language:EN-US'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-family:"Segoe UI",sans-serif;color:#1F497D;mso-fareast-language:EN-US'>I’ve made a few BT designs for domestic speakers, and the latency issue is mostly to do with the Codec. The default codec (SBC) has a few latency issues, but it should be in the 100mS range rather than seconds.<o:p></o:p></span></p><p class=MsoNormal><span style='font-family:"Segoe UI",sans-serif;color:#1F497D;mso-fareast-language:EN-US'>The standard low latency codec is aptX low latency (renamed now to the catch all aptX adaptive), and this is good enough not to cause lip sync issues when watching films etc.<o:p></o:p></span></p><p class=MsoNormal><span style='font-family:"Segoe UI",sans-serif;color:#1F497D;mso-fareast-language:EN-US'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-family:"Segoe UI",sans-serif;color:#1F497D;mso-fareast-language:EN-US'>Because the aptX codecs appear in higher grade machines, you’ll have to go up in price, and you might find it easiest to get an BT chip R&D evaluation kit, and use this instead. But these are open boards and need a bit of ( simple) programming.<o:p></o:p></span></p><p class=MsoNormal><span style='font-family:"Segoe UI",sans-serif;color:#1F497D;mso-fareast-language:EN-US'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-family:"Segoe UI",sans-serif;color:#1F497D;mso-fareast-language:EN-US'>Hope this helps<o:p></o:p></span></p><p class=MsoNormal><span style='font-family:"Segoe UI",sans-serif;color:#1F497D;mso-fareast-language:EN-US'><o:p> </o:p></span></p><div><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span style='font-size:10.0pt;font-family:"Segoe UI",sans-serif;color:#1F497D'>Kind Regards<o:p></o:p></span></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><b><span style='font-size:10.0pt;font-family:"Segoe UI",sans-serif;color:#1F497D'>Crispin Herrod-Taylor<br></span></b><b><span style='font-size:10.0pt;font-family:"Segoe UI",sans-serif'>Managing Director, Crookwood</span></b><b><span style='font-size:10.0pt;font-family:"Segoe UI",sans-serif;color:blue'><br></span></b><span style='font-size:10.0pt;font-family:"Segoe UI",sans-serif;color:#1F497D'><a href="http://www.crookwood.com/" target="_blank"><span style='color:purple'>www.crookwood.com</span></a> </span><span style='font-family:"Segoe UI",sans-serif;color:#1F497D'><o:p></o:p></span></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><i><span style='font-size:10.0pt;font-family:"Segoe UI",sans-serif;color:#1F497D'>Tel: +44 (0)1672 811 649<br>Mobile:+44(0)7910 637 634</span></i><span style='font-family:"Segoe UI",sans-serif;color:#1F497D'><o:p></o:p></span></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><i><span style='font-size:10.0pt;font-family:"Arial",sans-serif;color:#1F497D'> </span></i><span style='color:#1F497D'><o:p></o:p></span></p><p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><b><i><span style='font-size:10.0pt;font-family:"Arial",sans-serif;color:#1F497D'>Sign up for our great newsletter <a href="http://crookwood.com/newsletter/" target="_blank">here</a>!</span></i></b><b><span style='font-size:10.0pt;font-family:"Arial",sans-serif;color:#1F497D'> and keep up to date with the audio world</span></b><span style='color:#1F497D'><o:p></o:p></span></p></div><p class=MsoNormal><span style='font-family:"Segoe UI",sans-serif;color:#1F497D;mso-fareast-language:EN-US'><o:p> </o:p></span></p><div><div style='border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0cm 0cm 0cm'><p class=MsoNormal><b><span lang=EN-US style='color:windowtext'>From:</span></b><span lang=EN-US style='color:windowtext'> ProAudio <proaudio-bounces@bach.pgm.com> <b>On Behalf Of </b>Mike Rivers via ProAudio<br><b>Sent:</b> 16 May 2021 02:08<br><b>To:</b> proaudio@bach.pgm.com<br><b>Subject:</b> Re: [ProAudio] Bluetooth Latency (or Baby's First Bluetooth)<o:p></o:p></span></p></div></div><p class=MsoNormal><o:p> </o:p></p><div><div><p class=MsoNormal>On 5/15/2021 6:45 PM, Louis Judson wrote:<o:p></o:p></p></div><blockquote style='margin-top:5.0pt;margin-bottom:5.0pt'><p class=MsoNormal>I’ve been through the same thing, Mike, with the same Monoprice units when they were on sale for $22. My house is not big enough for the delay to be ignored! The only cool thing about those “transceivers” is that they also have Toslink digital if you like that. Hmm, I wonder if the latency is different using the digital connexion? I also think that it is characteristic of BT not the Monoprice units… <o:p></o:p></p><div><p class=MsoNormal><o:p> </o:p></p></div><div><p class=MsoNormal>I then found audio over cat5 cables at PartsExpress for an even lower price, so ran ethernet to the back room and it works pretty well. It’s RCA, not XLR, and sensitive to levels (some hum happens) but no latency…<o:p></o:p></p></div></blockquote><p class=MsoNormal style='margin-bottom:12.0pt'><br>Thanks for the input, Lou. If I was willing to run wiring, I'd do an analog run and be done with it. But at 78, I'm getting too old and clumsy to crawl through the attic and I was never good at finding a wire once I dropped it through the wall, so it would have to come into the room through a hold drilled through the ceiling at the corner nearest to where I want it, and then run down to the floor in the corner - not as neat as I'd want it. <br><br>As a side note, I'd probably run the audio through Cat5 cable anyway. It's cheap, I have a lot of it, and I've used it successfully for this before. I wire it as if balanced, using two twisted pairs for the left and right channel tip and ring, and another pair each for the sleeve. It makes a bit of an antenna but tolerable for the application, and cheeeeep. I'm pretty sure that's what's inside the lumps on those Parts Express "extenders," and there are a number of similar gizmos - 4-channel snakes are common. And if I decided to use it for real Cat5 data, the cable would already be there. <o:p></o:p></p></div><p class=MsoNormal><br><br><o:p></o:p></p><pre>-- <o:p></o:p></pre><pre>For a good time call <a href="http://mikeriversaudio.wordpress.com">http://mikeriversaudio.wordpress.com</a><o:p></o:p></pre></div></body></html>