tag:blogger.com,1999:blog-12018950526814034472023-11-16T04:31:15.697-08:00Graham Holliman VCISGLowehttp://www.blogger.com/profile/15361502269057878613noreply@blogger.comBlogger2125tag:blogger.com,1999:blog-1201895052681403447.post-57730546279088991462011-11-16T13:22:00.000-08:002011-11-16T13:27:26.020-08:00Pd Augmentation work begins.<a href="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjTlJjefas9XSAN1RfvL5-bSJDPdz_ePe3m7Xo1esxqFQIFgZ-2ws7hXU9bDM3U0-FTRvaHlK_8ZQ18H8dtMEUfbl-POW2ZPHx7rWfbu5q3lQeszw259sDwJ7e__CQUo4zmNPPbzQJD8yOf/s1600/Patch1.png" onblur="try {parent.deselectBloggerImageGracefully();} catch(e) {}"><img style="float:left; margin:0 10px 10px 0;cursor:pointer; cursor:hand;width: 314px; height: 320px;" src="https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjTlJjefas9XSAN1RfvL5-bSJDPdz_ePe3m7Xo1esxqFQIFgZ-2ws7hXU9bDM3U0-FTRvaHlK_8ZQ18H8dtMEUfbl-POW2ZPHx7rWfbu5q3lQeszw259sDwJ7e__CQUo4zmNPPbzQJD8yOf/s320/Patch1.png" border="0" alt="" id="BLOGGER_PHOTO_ID_5675708390426401810" /></a><br />So, I start building a patch. The idea is to record in realtime audio, pitch shift it and then fire the result through the Graham. I start with a simple patch, recording directly from the ADC into an array and then using tabread and tabplay to the DAC. Experimentation with the time shows a semi decent result can be achieved with a metro running at 31.25ms. There is a slight hint of 'grain' but this should be OK when pitched down several octaves.<div><br /></div><div><br /></div>Lowehttp://www.blogger.com/profile/15361502269057878613noreply@blogger.com0tag:blogger.com,1999:blog-1201895052681403447.post-29523292356045951672011-11-02T13:28:00.000-07:002011-11-02T13:33:12.890-07:00VCISG LinksCollected links relating to the VCISG:<br /><br />http://en.wikipedia.org/wiki/File:Graham_Holliman_Velocity-Coupled_Infra_Bass_speaker_design.jpg<br /><br />http://www.diyaudio.com/forums/subwoofers/3238-graham-holliman-velocity-coupled-infra-bass-speaker.html<br /><br />http://www.mediafire.com/?rhqzmvzep985rrr<br /><br />http://community.discovery.com/eve/forums/a/tpc/f/9401967776/m/34619609701<br /><br />http://theartofsound.net/forum/showthread.php?t=7197<br /><br />http://www.avsforum.com/avs-vb/showthread.php?t=1319327Lowehttp://www.blogger.com/profile/15361502269057878613noreply@blogger.com0