SynthMaker

Step lfo smooth line phase shift

Archive · 2010 7 old posts

From the original SynthMaker forum (2004–2014), with its members’ names and dates.

ccpurno ·

Hi,

smooth line draws fine inside SM 1.1.6, but as soon as I touch the smooth knob in any VST it jumps to a phase shift.

See picture. Seems the phase shift is getting worse to the right side. Also confirmed in stock LFO.

Test with attached schematic.

CC

stw ·

The example.osm works fine here.

EDIT: And so does the original STEP LFO from the Modelling Kit

MichaelBenjamin ·

i also cannot see the shift, are you sure you did not mod it and introduced some error? looks like the freqency is off for the smoothed line.

Acrobat ·

ccpurno wrote: Hi,

smooth line draws fine inside SM 1.1.6, but as soon as I touch the smooth knob in any VST it jumps to a phase shift.

See picture. Seems the phase shift is getting worse to the right side. Also confirmed in stock LFO.

Test with attached schematic.

CC

Probably you are using a samplerate other than 44100 Hz...that causes the bug. I

ccpurno ·

Probably you are using a samplerate other than 44100 Hz...that causes the bug.

Confirmed! Phase shift only happens at sampe rates other then 44100 Hz. I delved into the schematic and think something is going wrong in the freq module. But after checking it outputs the correct sample rate..

Wonder where its going wrong.

CC

Acrobat ·

ccpurno wrote: Wonder where its going wrong. CC

The fact is the visualization is done just by doubling the audio part, using a ramp, etc.. if GUIfied properly, it won't go nuts so easely, should be written back from scratch... 😉

ccpurno ·

ok, solved it!

I added a float sample and hold after the freq module. See picture and attached schematic.

Sample and hold shouldn't be needed though (?) Still a bug?

CC

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