Steve Harris wrote: >Thanks for doing that, I haven't had the time. Can you produce a spectrum >plot for the current s/w chain?
http://quitte.de/sine-spectrum.gif http://quitte.de/straight-spectrum.gif the first is generated by this chain: Sine (1046.5022612023945), # c''' Valve (.3, .7), HiPass (200), Inverter(), Rect (.5, .6), Inverter(), SineShaper (2.), Valve (.7, .8), HiPass (30), the second is the same chain with the SineShaper left out. >It would be more efficient to just calculate the corect chebyshev in >realtime, the problem is that they have lienar CPU cost with the number of >harmonics, 20 harmonics for example will be pretty expensive. As we are >building on the existing harmonics generated by the valve sim though we >shouldn't need that many. there's one problem i see: if we employ a chebyshev, it is going to create harmonics no matter what amplitude our incoming signal is iiutc. this is unlike the real thing, which will produce a different spectrum if one is playing softly, or with the volume control set low. (i'm fond of this effect because it allows me to change the sound pretty drastically without having to walk over to the amp.) tim
