Hi everybody,
wel i'm having fun at school (i started studying sound design), also having fun discussing the pros & contras of pd with my max teacher (he pretty quickly dismissed pd). Anyways, for another class (that I luckily can use whatever means necessary for) I have to do something with a square wave, where i have to create a composition with one oscillator and modulate a couple things. One of the things that need to modulate is the duty cycle (pulse width). My first approach with a wave form other then sin would be a wavetable osc like [tabread4~]. However, i dont see a very efficient method of creating pulse width modulation.
Could anybody suggest a way to approach this?
Thanks Anton
hi anton
squarewave: [phasor~] | [>~ 0.5] | [-~ 0.5] | [*~ 2]
the [-~ 0.5] and the [*~ 2] are there to get a signal between -1 and 1
pulse: [phasor~] | [number between 0 - 1( | / [>~] | [hip~ 5]
the [hip~ 5] removes the dc-offset of the pulse-signal
roman
--- Anton Woldhek woldhek@xs4all.nl schrieb:
Hi everybody,
wel i'm having fun at school (i started studying sound design), also having fun discussing the pros & contras of pd with my max teacher (he pretty quickly dismissed pd). Anyways, for another class (that I luckily can use whatever means necessary for) I have to do something with a square wave, where i have to create a composition with one oscillator and modulate a couple things. One of the things that need to modulate is the duty cycle (pulse width). My first approach with a wave form other then sin would be a wavetable osc like [tabread4~]. However, i dont see a very efficient method of creating pulse width modulation.
Could anybody suggest a way to approach this?
Thanks Anton
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cool thanks for that solution roman,
mathieu literally minutes ago suggested this solution: [expr~ tanh(100*$v1+$v2)]
i guess the outcome is the same with both solutions. However, this has pointed out to me that I still lack fundamental (meaning mathematical) understanding in this area, so i got stuff to learn :). Probably should turn back to miller's book and read again from page 1.
cheers Anton
----- Original Message ----- From: "Roman Haefeli" reduzierer@yahoo.de To: pd-list@iem.at Sent: Sunday, October 03, 2004 4:39 PM Subject: Re: [PD] square wave osc & pwm
hi anton
squarewave: [phasor~] | [>~ 0.5] | [-~ 0.5] | [*~ 2]
the [-~ 0.5] and the [*~ 2] are there to get a signal between -1 and 1
pulse: [phasor~] | [number between 0 - 1( | / [>~] | [hip~ 5]
the [hip~ 5] removes the dc-offset of the pulse-signal
roman
--- Anton Woldhek woldhek@xs4all.nl schrieb:
Hi everybody,
wel i'm having fun at school (i started studying sound design), also having fun discussing the pros & contras of pd with my max teacher (he pretty quickly dismissed pd). Anyways, for another class (that I luckily can use whatever means necessary for) I have to do something with a square wave, where i have to create a composition with one oscillator and modulate a couple things. One of the things that need to modulate is the duty cycle (pulse width). My first approach with a wave form other then sin would be a wavetable osc like [tabread4~]. However, i dont see a very efficient method of creating pulse width modulation.
Could anybody suggest a way to approach this?
Thanks Anton
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