Sound effects from microcontroller pin using PWM

Posted by Rohit on May 13, 2009, 11:13 am

hi,

I am working on a hobby project to generate sound effects with 89c2051
using PWM. I am able to generate keyboard notes with it by generating
pwm signals of different frequencies. But I am at loss as how to
generate
other effects like car crashing,bird chirping,machine gun sound etc. ?

I googled but could not find exact idea.

-Rohit

Posted by Den on May 13, 2009, 2:39 pm

Rohit a écrit :

> hi,
>
> I am working on a hobby project to generate sound effects with 89c2051
> using PWM. I am able to generate keyboard notes with it by generating
> pwm signals of different frequencies. But I am at loss as how to
> generate
> other effects like car crashing,bird chirping,machine gun sound etc. ?
>
> I googled but could not find exact idea.
>
> -Rohit

Try to run some ISD2560/75/120 (Winbond) from your 89c2051.

Hope this helps,
Den

Posted by Colin Durrans on May 13, 2009, 4:41 pm

Hi Rohit,

Have you hear about 1-bit sound? I think this is a great resource:-

http://www.romanblack.com/picsound.htm

If you've got the sound on your PC you can encode it for play back via
your micro-controller. You might want to interface some memory depending
on the length of the sound and the quality your looking for.

best regards,
Colin

--
www.minisumo.org.uk

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