-ish

i would just shift the input range so that the lower limit in Hz becomes 60 ... ftom ... scale to whatever you need.

for other than chromatic i would convert chromatic to myscale as a last step (because i already have that ready) (but i am afraid you would prefer to have your controller reflecting the distances already, right?)

& use float for your slider, especially for the conversion to diatonic.

I had thought about using [ftom], but how I would implement it is unclear to me. I am using the pitch factor slider to affect the pitch of 'live' audio input, where a value of 1 = no pitch shift, 0.5 = octave down and 2 = octave up. I should have clarified that I'm not really seeking Hz to semitones conversion, it's Hz ratios to semitones that I'm after.

to convert semitone steps into a pitch scalar, I use the following formula:

[expr pow(2, $f1/12), where $f1 is a +/- integer

;)

https://www.youtube.com/watch?v=PKg2ZzPKl2M

(pics or it didn't happen)

i love solving such puzzles (and i usually have all requried parts alredady) but i still dont fully understand the original application. :) so we start with GUI slider from -4 to 4, which represents octaves, right? whats next? what other variables and constants are mandatory and how should the output look like? why do Hz matter at all - cant most be done linear?

Are you trying to reproduce different historical temperaments or microtonal and just intonation ratios? Either way, if I understood it well, I think the most flexible way is to be able to import tuning description files. Maybe you're looking for something like this? http://sevish.com/2014/how-to-play-microtonal-scales-on-a-maxmsp-synth/

Hi Roman and Felipe, the pitch ratio slider was used to multiply the pitch of a granular time/pitch stretcher, so that 1 = no shift, 0.5 = -1 octave, 2 = +1 octave. Using floating point values we get a glissando effect when moving the pitch scalar (it was a little counterintuitive anyway: starting in the middle and lowering the pitch scalar from 1 towards zero causes a pitch drop, then continuing into negative values gradually raises the pitch but with 'reversed' grains). In order to make it a little more 'musical' I decided to use semitone increments instead of glissando (and I added a 'reverse grain direction' toggle), so now my slider goes from -3 to +3 octaves, which to me is a little more intuitive. Sorry for not being clearer, and I probably muddied the water by asking for a specific formula as [expr pow(2, $f1/12)] does exactly what I want: semitones input = pitch ratio output.

Thanks gents ( short demo here, if you like https://www.youtube.com/watch?v=HyPHeqjXSH0 )

Just to clarify: I am multiplying the grain frequency by a pitch scalar, shrinking or growing the grain causes a shift in pitch: 1000/(grainDur*pitchScalar) = Hz)

HTH

so that 1 = no shift, 0.5 = -1 octave, 2 = +1 octave ... you can probably avoid this ratio stuff when there is an mtof later. but as long as it works...

-110 (linear mapping version)

@Felipe, I'll probably just use a [coll] for a variety of pitch collections ;)