it is in fact one of my pedagogical journeys :) but it it great to know about this james, thanks.
But here's an update. I was running Pd at 32Khz sample rate and didn't realize it. When I got it running at 44.1 KHz... voilá!!! It does sound PRETTY CLOSE!!! so this mean filter seems about right after all... cheers 2015-11-06 17:29 GMT-02:00 James Bullock <[email protected]>: > > Hi Alex, > > DX is really a family of synths which all sound different and work in > subtly different ways. AFAICT FM8 does aim to emulate any particular synth > but rather to capture the essence of that family. Some say it is closest to > the DX7II. > > If you want to get a good DX7 emulation in Pd, I'd recommend using my > pluginhost~ external along with the excellent Hexter DSSI plugin > http://dssi.sourceforge.net/hexter.html > > This is going to be more efficient than implementing in Pd, and it > supports many of the features of the original instrument. The sound is > mostly pretty close. > > Unless of course this is another one of your pedagogical journeys ;) > > Best, > > Jamie > > > > On 6 Nov 2015, at 18:51, Alexandre Torres Porres <[email protected]> wrote: > > > Howdy, I'm just trying to understand how the Feedback modulation works in > FM8 (from NI) and how it really is the same as in DX7. I'm actually also > using SuperCollider, which provides a self modulating oscillator > (SinOscFB), but it just burst and blows up in noise way before the FM8 does > with the same modulation index. I've made an equivalent patch in Pd for > SinOscFB. Now, I know that in Supercollider there is no filter in the > feedback, and I was researching around the web and found out about the DX7 > patents where they described the usage of a mean filter in the feedback > loop. Here's the patent > http://www.google.com/patents/US4249447?dq=4249447&ei=7vK4T_m5LKOH6QHH2pTsCg > > this was actually discussed in a Pd Forum. I tried the mean filter in the > feedback loop, but it doesn't really sound closer to FM8's self modulating > oscillator. FM8 is supposed to be a kind of perfect clone to DX7. I don't > have a DX7, but I have FM8, so I'm using it as a guide to recreate DX7 > patches in Pd. > > This may be a long shot, but I wonder if anyone out there could help me > out nailing the perfect sound and behaviour of the self phase modulating > oscillator. > > thanks > > _______________________________________________ > [email protected] mailing list > UNSUBSCRIBE and account-management -> > http://lists.puredata.info/listinfo/pd-list > >
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