Are pulse waves just non-symmetrical modulated square waves?

Discussions about anything analog, digital, MIDI, synth technology, techniques, theories and more.
User avatar
moremagic
Active Member
Active Member
Posts: 314
Joined: Mon Dec 28, 2009 9:29 am
Real name: A.M.
Gear: electribe er-1, sp-303, sp-404sx, s612, nuo 2, sl-1200 mk ii, beatstep, eurorack, tb-03, vx-99
Location: nc

Re: Are pulse waves just non-symmetrical modulated square wa

Post by moremagic » Sun Feb 10, 2013 8:27 pm

calaverasgrande wrote:
polyjuno wrote:Image
Actually I am curious if this is an accurate picture?
Wouldnt it be 12.5% duty cycle positive, then hang out at 0 for 37.5% duty cycle, then 12.5% negative, then back to zero for 37.5% of the duty cycle.
That picture appears to be more of a DC pulse.
that picture is accurate. a pulse wave has 2 states: high and low. the three states you describe sounds akin to a DAC or the digitally generated sawtooth waves on the poly800

polyjuno
Newbie
Newbie
Posts: 87
Joined: Fri Feb 24, 2012 3:19 am
Gear: Bass Station 2
Juno-6
Roland TR-606, Yamaha RX11
Fender Telecaster
Location: Norway

Re: Are pulse waves just non-symmetrical modulated square wa

Post by polyjuno » Sun Feb 10, 2013 8:40 pm

A very crude saw wave then. :P The Poly-800 at least has 16 steps.

edit: Really, the way he describes it, it would be more like a triangle wave?

User avatar
Automatic Gainsay
Synth Explorer
Synth Explorer
Posts: 3962
Joined: Wed Feb 14, 2007 12:22 am
Real name: Marc Doty
Gear: Minimoog, 2600, CS-15, CS-50, MiniBrute, MicroBrute, S2, Korg MS-20 Mini, 3 Volcas, Pro 2, Leipzig, Pianet T, Wurli 7300, Wurli 145-A, ASR-10, e6400.
Band: Godfrey's Cordial
Location: Tacoma
Contact:

Re: Are pulse waves just non-symmetrical modulated square wa

Post by Automatic Gainsay » Mon Feb 11, 2013 12:38 am

A lot of square waves aren't even flat on top.
Just sayin'
‎"I am not able rightly to apprehend the kind of confusion of ideas that could provoke such a question." -Charles Babbage
"Unity and Mediocrity are forever in bed together." -Zane W.
http://www.youtube.com/automaticgainsay

steveman
Active Member
Active Member
Posts: 335
Joined: Thu Oct 05, 2006 4:08 pm

Re: Are pulse waves just non-symmetrical modulated square wa

Post by steveman » Mon Feb 11, 2013 2:07 am

moremagic wrote:
calaverasgrande wrote:
polyjuno wrote:Image
Actually I am curious if this is an accurate picture?
Wouldnt it be 12.5% duty cycle positive, then hang out at 0 for 37.5% duty cycle, then 12.5% negative, then back to zero for 37.5% of the duty cycle.
That picture appears to be more of a DC pulse.
that picture is accurate. a pulse wave has 2 states: high and low. the three states you describe sounds akin to a DAC or the digitally generated sawtooth waves on the poly800
The waveform he's describing is a double pulse. In some cases you can modulate the negative and positive pulse widths independently. There are a couple of modular oscillators that have it - the Intellijel Rubicon and IIR the Livewire AFG.

Post Reply