Can I process a list of frequencies and 'tune' them to quarter and eight notes.

You need to specify the length of a quarter note ('beats per minute' bpm) which will let you calculate quarter notes per second (Hz). And then multiply that by .5 to get eighth notes per second.

From there you can adjust your frequencies to the nearest multiple of your Hz value.

ex. bpm = 120 quarter notes per minute = 2 Hz quarter notes

freq list: 144.56 1253.42 765.98
tuned list: 144 1254 766

Is that what you're talking about?

I believe he is trying to achieve some sort of microtonality and having a confusion between 'half note' and 'half tone'

I thought about that but 'eighth tone' seems a bit out there.. ;)

Is this accurate?

if it is to do with frequencies in the audio spectrum (as distinct from the event spectrum)

I'd do it this way:

i would do it like this: first expand, so that you can just round to nearest integer:

1.) input*8

2.) round to int (for example [expr int($f1+0.5)])

3.) back to original base: / 8.

4.) probably [mtof] ...

it wasnt me, if i am not putting that all in one line:

truncatevaluesinalistoffloatstoclosest1/nandconverttofrequency! ;)

[vexpr (440.*exp(0.057762265)*(((int(($f1*$f2)+0.5))/$f2)-69.)))]

where $f2 is the scale division. (others would probably have preferred to do it on a steps-per-octave/temperament scale basis)

-110

Hello,

Thank you all for you replies it is indeed microtonal tuning I am after, sorry for the confusion. I have been through the solutions you have offered...

Floating point - It seems I don't quite understand this solution?

Midi C4 = 523.25
midi C#4 = 554.36

so I would expect a quarter tone to be between these values? I worked it out as 538.8 Your patch doesn't seem to tune to the closest quarter tone value? For example if I put in 530. I would expect it to tune to 538.8 as the closest value. It actually tunes to 530.86.

The same for the other solutions offered. I already know the pitches, what I need is a patch that will round up and down any frequencies to those set pitches. You could do an incredibly long-winded

I also thought I could have the tunings in a coll and then scale my input from frequncy to the number of items in the coll, but when I tried it, it didn't seem acurate.

Thanks so much for your suggestions so far, any other ideas based on my making the requirements a bit clearer?

you are almost at it. but you should not start thinking in hertz, this leads to nowhere. do all these operations on the linear layer only. a quarter tone over C4 is 72.5. now make sure that 72.33 is rounded to 72.5. thats what my vexpr does unless it contains a typo.