Hi Dave, On Mon, 20 Aug 2012 00:27:12 -0400 David Robillard <[email protected]> wrote: > I am porting to LV2 some AMS-influenced plugins (mainly those by Fons) > which have odd 1/Oct frequency ports. I understand why it is > sometimes convenient to use octaves rather than the more typical Hz > for frequency, but after some digging to figure out how to precisely > describe this unit, I discovered the central frequency is middle C, > i.e. C4, i.e. around 262Hz.
I know that most of the 1/octave ports in these plugins describe *intervals* rather than *frequencies*, that is, they describe frequency ratios relative to bases usually specified by other ports. Are you saying that there are some 1/octave ports which are actually used to describe absolute frequencies, independently of other input? If so, that is odd, as you said. But to address your question, any "standard" for 0.0 = X Hz is going to be arbitrary, whether it is ~261.625Hz or 440Hz or even 415Hz for the baroque folks. If you're proposing something that asks plugin authors to "fix" their plugins to the standard, why not just ask them to be clear about whether a port specifies an interval or an absolute frequency, and if it's an absolute frequency, use the more typical Hz port type? -Sean _______________________________________________ Linux-audio-dev mailing list [email protected] http://lists.linuxaudio.org/listinfo/linux-audio-dev
