Re: [Faudiostream-users] bug in lf_sawpos? (and a possible solution)

Thanks for the heads up! I will update, test, and commit soon (end-quarter crunch right now) - Julius On Thu, Jun 9, 2016 at 3:24 AM, Bart Brouns wrote: > Hi Julius, > > I just noticed, in oscillator.lib, sawN still uses the old saw algo. > > Cheers, > Bart. > > > On Thu,

Re: [Faudiostream-users] bug in lf_sawpos? (and a possible solution)

Hi Julius, I just noticed, in oscillator.lib, sawN still uses the old saw algo. Cheers, Bart. On Thu, Jun 02, 2016 at 07:32:17AM +0200, Bart Brouns wrote: >Thanks! > >On 2 jun. 2016, at 03:00, Julius Smith wrote: > >> Yes, the two cases behave surprisingly differently

Re: [Faudiostream-users] bug in lf_sawpos? (and a possible solution)

Thanks! On 2 jun. 2016, at 03:00, Julius Smith wrote: > Yes, the two cases behave surprisingly differently (to me) in the > time-varying case. Yours is more robust, so I've adopted it as > follows: > > // --- lf_sawpos --- > // simple sawtooth waveform oscillator

Re: [Faudiostream-users] bug in lf_sawpos? (and a possible solution)

Yes, the two cases behave surprisingly differently (to me) in the time-varying case. Yours is more robust, so I've adopted it as follows: // --- lf_sawpos --- // simple sawtooth waveform oscillator between 0 and 1 lf_sawpos(freq) = frac ~ +(freq/ml.SR) with { // Bart Brouns version frac(x) =

Re: [Faudiostream-users] bug in lf_sawpos? (and a possible solution)

Hi Julius, I just tested with moving frequencies and the difference becomes even bigger: (par(i, 1000, my_lf_sawpos(abs((i+10) *lfo) )):>_)/1000 (par(i, 1000, lf_sawpos( (i+10) *lfo )):>_)/1000 take 30 and 65 % respectively, even with the (usually unneeded) abs. Cheers, Bart.

Re: [Faudiostream-users] bug in lf_sawpos? (and a possible solution)

Hi Julius, Here is a screenshot of the output with default slider values, so the frequency modulates between 0 and 110. https://i.imgsafe.org/d635e0c8e8.png I looked at the CPU usage too, and it turns out that on my system at least, my saw is cheaper: (par(i, 1000, my_lf_sawpos(i+10 )

Re: [Faudiostream-users] bug in lf_sawpos? (and a possible solution)

Hi Bart, As can be seen from its implementation: // --- lf_sawpos --- // simple sawtooth waveform oscillator between 0 and 1 lf_sawpos(freq) = lf_rawsaw(periodsamps) / periodsamps with { periodsamps = float(ml.SR)/max(1.0e-7,abs(freq)); }; lf_sawpos takes the absolute value of its freq