tag:blogger.com,1999:blog-2671439418188048550.post719442689741921015..comments2023-11-09T04:54:20.905-08:00Comments on Gordophone: My King VOX Ampliphonic Octavoice IIGordon Goodhttp://www.blogger.com/profile/02789377236535400196noreply@blogger.comBlogger4125tag:blogger.com,1999:blog-2671439418188048550.post-5940149992602914312016-12-19T15:45:24.902-08:002016-12-19T15:45:24.902-08:00hope it helps... based on your breath controller e...hope it helps... based on your breath controller entries i ordered an mpxv4006 to use with my ribbon midi bass controller (http://synthstuff.blogspot.ch), let's see how that goes. so thank you for this blog!lokkinoreply@blogger.comtag:blogger.com,1999:blog-2671439418188048550.post-14503709252248683432016-12-19T08:30:46.188-08:002016-12-19T08:30:46.188-08:00Lokki, thanks for explaining how the analog octave...Lokki, thanks for explaining how the analog octave-splitting works!Gordon Goodhttps://www.blogger.com/profile/02789377236535400196noreply@blogger.comtag:blogger.com,1999:blog-2671439418188048550.post-76082310084699769492016-12-18T12:13:56.189-08:002016-12-18T12:13:56.189-08:00hi there, octave down effects in analog domain are...hi there, octave down effects in analog domain are never done with fft or the like, and are therefore very fast. if you understand how it is done in analog, you can code a very fast version too.<br /><br />basically the signal gets squared and then run through a flip-flop (an arrangement of two transistors that activates either one or the other when an input goes high) nowadays there are flip-flop ic's. if you just "read" one of the flip flops output, you get....yes, half the frequency of the input, or octave down. so you take this squarewave and lowpass it again heavily to make it sound not so synthie and distorted. if you want to get fancy you read the envelope of the input and reapply it to the octave down signal. and if you want to get really fancy, you should stitch the original audio together based on the ovtave down squarewave. that is what is done in the oc-2 octaver by boss (all analog). here is a good link of a diy project that uses a similar approach to get very smooth octave down tones: http://www.valvewizard.co.uk/uboat.html<br /><br />cheerslokkinoreply@blogger.comtag:blogger.com,1999:blog-2671439418188048550.post-29926779652289364182016-08-03T10:54:42.973-07:002016-08-03T10:54:42.973-07:00Cool! My my does that circuitry look messy though....Cool! My my does that circuitry look messy though. But it works!<br /><br />My project is coming along - the Teensy works well, although the 1024 point FFT doesn't allow for great frequency resolution in the lower register. I'm currently looking into improving this resolution, as well as exploring other methods of transduction altogether.<br /><br />Hope you're well!DBaylieshttps://www.blogger.com/profile/09749402000641517245noreply@blogger.com