[PD] arduino melody example in PD?

[Collin]

That sketch is playing a tune making square waves of different  
frequencies. That's not really the same as PWM, which varies the  
length of the pulse, but the frequency stays constant. There are a  
few ways to generate a square wave of a given freq. in Pd, if that is  
your goal. If you want to do it by modeling the Arduino's use of a  
timer to turn a signal on and off, that might be an interesting  
exercise. One easier way, though, would be to amplify and clip a sine  
wave.

[osc~ 440]
|
[*~ 50]
|
[clip~ -0.5 0.5]

then if you plug a 50 cent piezo buzzer into the sound card of your  
$1000 laptop, it will sound just like a $3 avr!

Then you could store the note durations and frequencies in 2 separate  
arrays, like in the Arduino sketch, where the freq is sent to the  
[osc~] and the duration is sent to a [delay] that sends a bang to a  
counter that increments to the next array elements. Then it will play  
"Twinkle, twinkle," and what could be better than that!

Collin



> Message: 6
> Date: Sat, 07 Nov 2009 22:59:36 +0100
> From: altern <altern2 at gmail.com>
> Subject: [PD] arduino melody example in PD?
> To: the PureData - mailinglist <pd-list at iem.at>
> Message-ID: <4AF5EDC8.6040407 at gmail.com>
> Content-Type: text/plain; charset=ISO-8859-1; format=flowed
>
> hi
>
> i have been trying to port this example to PD
>
> http://arduino.cc/en/Tutorial/Melody
>
> it just uses a piezo to buzz a song. i dont understand very well this
> PWM controls and also I am finding quite difficult to translate the
> arduino code to PD. So after some headache i thought maybe someone has
> already done this for PD?
>
> thanks
>
> enrike

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