cool

here's my patch anyway

2015-11-06 17:01 GMT-02:00 James Correa <jcorrea.mus@gmail.com>:
Hi Alexandre,

Someone a long time ago made a DX7 in Csound, don't remember names but I might have it in somewhere. If I find I'll send it to you, may be will help you.

Abraço,

James

On 6 November 2015 at 16:50, Alexandre Torres Porres <porres@gmail.com> wrote:
here's the discussion from the forum, I could also try reviving that thread :)


2015-11-06 16:49 GMT-02:00 Alexandre Torres Porres <porres@gmail.com>:

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


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