Is there a single object that can take an array and resize it while interpolating the data within it?

For example, say I have a 64 element array representing a spectrum, but I need a 512 element array so that it will fit my block size.

How can I take the 64 element array and "expand" it to 512 elements (i.e. the 64th element becomes the 512th element and all points in between are interpolated)?

I thought about using tabread4~ with an until loop, but this seems inefficient and highly cluttered, but I'm not entirely sure how to get the size of the array. Please tell me there's an easier way to do this that I've somehow missed!

I think all you need to do is take an ifft using a size of 64 and then take another fft of 512 https://ccrma.stanford.edu/~jos/ReviewFourier/Practical_Zero_Padding.html
there's also an "external" that comes with vanilla called arraysize, and an object called tabread4 (non-signal version), so if you wanted to do interpolation you could iterate from 63 to 0 in 512 increments of (64/512) and go from a tabread4 into a tabwrite going from 511 to 0

I've tried a loop with tabread4, but unfortunately it doesn't seem to work.

Attached is my patch. When I try to run it, the output of tabread4 is always the last element in the array, and it doesn't write to the new array. It just prints out the last number of the array N times, but printing out the indices shows they're incrementing correctly.

What am I doing wrong?

http://www.pdpatchrepo.info/hurleur/resizeinterp.pd

idk but heres what I meant

http://www.pdpatchrepo.info/hurleur/resizeinterp.pd