poserp Posted October 7, 2013 Share Posted October 7, 2013 I've done enough telling, now it's time for showing: http://www.ksetlist.com/viewtopic.php?f=35&t=710 Let me know if you can't access that file (i.e. you don't want to create a ksetlist account) and I'll post it someplace else; at the moment that seems to be the best clearinghouse for PC3 files. Anyways, this is a demo patch showing what NXTP is all about. I've included another program as well, "NXTP San PedroFM" that's the basic FM synthesis behind the program. The "NXTP" part is implemented in "NXTP San Pedro" and demonstrates how frequency-dependent FM and other techniques can be used to create a more realistic "electric piano". Since we no longer have Sonikmatter, forgive me while I use this space to talk a bit about the extra synthesis that's going on here. Currently, most synths do some combination of AM, FM, physical modeling, additive, subtractive, and/or wavetable synthesis. These are fine and good, and there are many sounds that can be done using these techniques, but there are limitations. For instance, the main limitation with physical modeling is computation power; that won't be a limit for too much longer, but at the same time as computers get faster the physical models become more complex. AM and FM create interesting spectra but the capabilities for controlling the resulting partials are somewhat limited. You can get pretty far if you understand the math behind both techniques, however there are more advanced frequency shaping things that either can't be done or are much easier if you throw in classical subtractive filters. What I'm trying to do is find shortcuts. For instance, by combining FM and subtractive synthesis, I think we can approach more complex synthesis tasks (wind instruments, electro-acoustic pianos, etc) without the expensive computations of physical modeling. This is what I am doing with NXTP -- using combinations of FM, subtractive, and various proprietary VAST synthesis techniques together to create "realistic" instruments (or get more "realistic" than you can by using any of the aforementioned synthesis methods in isolation). I think the results are pretty good, although there's much work left to be done. With San Pedro you can adjust things like cabinet and tone bar resonances and have these interact with each other in interesting ways. It's implemented as two parallel bandpass filters (one with a fixed frequency, one that tracks the notes played) into an FM operator, so the basic signal path is two FM operator pairs in series, mixed together and sent through two parallel bandpass filters, with a final FM operator at the end that can be mixed with the summed output from the filters. So, the filters provide control over the output of the first two FM operator pairs and impart the "fingerprint" of the cabinet and individual tone bar on the signal. Then, when FM is applied to the result, the sidebands produced carry that same signature. So, enjoy and feel free to leave feedback. Thanks! My music http://www.cdbaby.com/Artist/Pk12 My Soundware (Kurzweil PC3)http://pksoundware.blogspot.com/ My Kurzweil PC3 Tutorials http://www.youtube.com/user/poserp. Link to comment Share on other sites More sharing options...
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