dnk777

I'm trying to implement more complex IIR filters. It has many poles so I want my coefficients as accurate as possible, but when I create [* * -0.00033939556808664] and Cycling74 claim that MaxMSP and GEN is using 32 bit floats, then it should be rounded to the nearest 32bit float number, which is -3.3939557E-4 ...but what I get instead is -0.000339 which is few orders of magnitude less precise than float32.

Hello,
I'm trying to implement more complex IIR filters. It has many poles so I want my coefficients as accurate as possible, but when I create [* * -0.00033939556808664] and Cycling74 claim that MaxMSP and GEN is using 32 bit floats, then it should be rounded to the nearest 32bit float number, which is -3.3939557E-4 ...but what I get instead is -0.000339 which is few orders of magnitude less precise than float32.


why-is-gen-rounding-my-float-numbers

Thanks to some people in max/msp facebook group I found, that regular Max (outside of gen~) doesn't truncate the numbers, just doesn't show them whole. But in gen~ it really does truncate. When you try to create [* 0.00000143434], it will really get it trucated to 0.000001, which is what you will see in the code and also if you save it as .gendsp file, you won't find there 0.00000143434 but just 0.000001,,,

Workaround for this bug is to use [expr] object instead of [*] in gen~

(at least in max6. gen doesn't work for me in max7 demo so i cannot try)

Thanks to some people in max/msp facebook group I found, that regular Max (outside of gen~) doesn't truncate the numbers, just doesn't show them whole. But in gen~ it really does truncate. When you try to create [* 0.00000143434], it will really get it trucated to 0.000001, which is what you will see in the code and also if you save it as .gendsp file, you won't find there 0.00000143434 but just 0.000001,,,
Workaround for this bug is to use [expr] object instead of [*] in gen~

(at least in max6. gen doesn't work for me in max7 demo so i cannot try)


why is gen rounding my float numbers?