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exonerate ·
Ok just felt like posting about this....
Basically when learning to use the code component in SM one of the first things you learn is how to create loops, in every example of oscillators I saw the loop was always written like this....
The shortest possible way of creating a loop in SM is like this...
count = (count+freq)&(count<=1);
Which cuts out the need for a subtraction.
Cheers 😉
Exo
stefan ·
exonerate wrote: or it can be written...
count = (count+freq) - (count>=1)&1;
Which would cut out one memory access for count.
This one can go over 1.
exonerate wrote: The shortest possible way of creating a loop in SM is like this...
count = (count+freq)&(count<=1);
Which cuts out the need for a subtraction.
And this one can go over 1 too, and also it will result in an inaccurate frequency (the cycle length will vary and hence add noise).
You need to add "+freq" in the comparison for both to be correct 🙂
exonerate ·
stefan wrote:
exonerate wrote: or it can be written...
count = (count+freq) - (count>=1)&1;
Which would cut out one memory access for count.
This one can go over 1.
exonerate wrote: The shortest possible way of creating a loop in SM is like this...
count = (count+freq)&(count<=1);
Which cuts out the need for a subtraction.
And this one can go over 1 too, and also it will result in an inaccurate frequency (the cycle length will vary and hence add noise).
You need to add "+freq" in the comparison for both to be correct 🙂
Ah thank you stefan, I see why that would be the case now, as I'm comparing the previous value of "count" rather than the current value. And obviously the current value will be more than the previous, hence the over shoot. 🙂
so the code could still be written...
count = count +freq;
count = count &(count<=1);
still with no need for a subtraction.
Cheers 😉
Exo
stefan ·
That one will still have a varying frequency for every cycle though, because the cycle length will vary...
MegaHurtz ·
add an "optimised" oscilator to the side, maybe?
MegaHurtz ·
or.. add or subtract nth sample every cycle the target nr of samples is a float.
MegaHurtz ·
Come to think of it. You really can`t avoid the need for infinite precission here.
..sry 😉.
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