On Fri, Aug 08, 2014 at 04:47:26PM -0700, Ken Restivo wrote: > It looks like this: > http://bace.s3.amazonaws.com/dcoffset.jpg That's a very mild case, probably harmless. What I got, just by selecting one of the presets ('classic pad' or something similar) was a DC offset 30 times as big as the audio signal. In terms of power that close to a 1000:1 ratio. > > Whatever qualities it may have, this is crappy. > > I guess so. But maybe it's dangerousness is what gives it its sound. You can't hear DC. It may drive your speakers into some nice distortion before the funny smell appears, but there are less dangerous ways to achieve the same. > Will Alexander once described Keith Emerson's Moog as having "no > padded cell technology". Meaning, it was capable of destroying amps, > PA systems, expensive mixing boards, huge stadium-sized house sound > systems, etc. He treated the thing like a loaded weapon when plugging > it into stuff. Maybe this is what he meant by that. That can be said of any synth in fact. And I'm pretty sure that ELP's PA system was not DC-coupled - the mixers they used had transformer inputs. DC offsets occur naturally when using phase modulated oscillators even if their basic waveform is DC-free. It's part of the way PM synthesis works, and you want the DC in the modulation inputs. But once the VCO outputs enter the other parts of the audio path it should be removed. It's trivially simple to do that. -- FA A world of exhaustive, reliable metadata would be an utopia. It's also a pipe-dream, founded on self-delusion, nerd hubris and hysterically inflated market opportunities. (Cory Doctorow) _______________________________________________ Linux-audio-user mailing list Linux-audio-user@xxxxxxxxxxxxxxxxxxxx http://lists.linuxaudio.org/listinfo/linux-audio-user
