Important note: If you like to draw your own waveforms by feeding the saw wave output of an Oscillator into a Graphic Shaper, make sure that Anti-aliasing is switched off in the oscillator.
As a matter of interest, why do you choose the saw wave? I’ve been using graphic shaper to happily draw waveforms for quite a while but have always used the sine wave output of an oscillator.
I think one of main the reasons to use a saw wave as a base for drawing is that it covers the entire -1 to +1 range so the same value doesn't appear more than once. If you use sine or triangle the same value appears multiple times...
That’s not something I’d ever thought about to be honest and a quick check of the oscilloscope didn’t show anything untoward in that regard when I first started doing it - eg if I drew a simple square wave then the oscilloscope showed that square wave exactly as I had drawn it (I tend to use my ears more than relying on the oscilloscope but it was handy at the time while I was learning/experimenting).
Comments
Important note: If you like to draw your own waveforms by feeding the saw wave output of an Oscillator into a Graphic Shaper, make sure that Anti-aliasing is switched off in the oscillator.
As a matter of interest, why do you choose the saw wave? I’ve been using graphic shaper to happily draw waveforms for quite a while but have always used the sine wave output of an oscillator.
I think one of main the reasons to use a saw wave as a base for drawing is that it covers the entire -1 to +1 range so the same value doesn't appear more than once. If you use sine or triangle the same value appears multiple times...
Ah, ok - that makes sense: many thanks @samu .
That’s not something I’d ever thought about to be honest and a quick check of the oscilloscope didn’t show anything untoward in that regard when I first started doing it - eg if I drew a simple square wave then the oscilloscope showed that square wave exactly as I had drawn it (I tend to use my ears more than relying on the oscilloscope but it was handy at the time while I was learning/experimenting).
@samu - yeah, wow. I drew a quick approximation of a sine wave & fed it a sine wave:
Whereas feeding it a saw (with anti-aliasing off):
(and to show why anti-aliasing needs switching off as per @rs2000 instruction):
Thanks @samu & @rs2000 & @lala for the hp filter instruction 🙏🙏
🙏