http://cycling74.com/forums/topic/scaling-linear-to-logarithmic-using-slider-to-control-biquad-filter-cutoff/feed Wed, 19 Jun 2013 04:34:40 +0000 http://bbpress.org/?v=2.2.4 http://cycling74.com/forums/topic/scaling-linear-to-logarithmic-using-slider-to-control-biquad-filter-cutoff/#post-63236 http://cycling74.com/forums/topic/scaling-linear-to-logarithmic-using-slider-to-control-biquad-filter-cutoff/#post-63236 Thu, 26 Apr 2012 15:41:21 +0000 DJF I am wanting to control the cut-off frequency of a biquad filter with a slider or dial. I have noticed that the scaling of a slider to a filter, i.e. [0 127 0.0001 22000], does not work so well as the filter is logarithmic by default. Can anyone advise me on a way around this?

]]> http://cycling74.com/forums/topic/scaling-linear-to-logarithmic-using-slider-to-control-biquad-filter-cutoff/#post-228103 http://cycling74.com/forums/topic/scaling-linear-to-logarithmic-using-slider-to-control-biquad-filter-cutoff/#post-228103 Thu, 26 Apr 2012 18:11:18 +0000 11olsen if you can’t find the expression [linedrive] might be of help.

]]> http://cycling74.com/forums/topic/scaling-linear-to-logarithmic-using-slider-to-control-biquad-filter-cutoff/#post-228104 http://cycling74.com/forums/topic/scaling-linear-to-logarithmic-using-slider-to-control-biquad-filter-cutoff/#post-228104 Thu, 26 Apr 2012 20:01:08 +0000 LiamCormacGould [curve] or something like that maybe?

]]> http://cycling74.com/forums/topic/scaling-linear-to-logarithmic-using-slider-to-control-biquad-filter-cutoff/#post-228105 http://cycling74.com/forums/topic/scaling-linear-to-logarithmic-using-slider-to-control-biquad-filter-cutoff/#post-228105 Thu, 26 Apr 2012 20:34:17 +0000 DJF I will try both of those suggestions. Someone told me that to map a 0 127 linear to 0 22000 logarithmic scale you should carry out the equation log127(2200). Does anyone know how I would go about doing this with the expression object?

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