Reproducing Voice using PIC Micro PWM

Guest · Posted: Mon May 10, 2004 4:17 am

Hi ,

I have a requiremement of reproducing voice in my application
Is it possible to play a wave file through PIC Micro PWM

Has any body done this ?

Can somebody throw some light on this?

Thanks,

Michael

Woody · Joined: 11 Sep 2003 Posts: 83 Location: Warmenhuizen - NL

Hi,

Google : pic speech

First hit: http://centauri.ezy.net.au/~fastvid/picsound.htm

I think that this solution was mentioned on this board before; I have no experience with it myself.

Good luck,

Paul

Guest · Posted: Mon May 10, 2004 7:37 pm

SteveS · Joined: 27 Oct 2003 Posts: 126

I've played with it some - fidelity was not as good as I had hoped, but I really didn't give it a full, fair trial. It does work though. I set it up to sample and play back at the same time so I could A-B test it.

Mc · Joined: 07 May 2004 Posts: 11

Has anybody tried it?

I want to add some voice confirmation to my project (18f252 + multiple 16f818 i2c slaves) so I tested it today. It works indeed but I get a very very weak signal (I can't use an oscilloscope right now so I don't know how 'weak' it is).

I've no idea of audio proccessing so any advice would be welcome Wink

. What do I need to amplify that signal? How much do I have to amplify it? What kind of speaker is suitable to this kind of playback?

Thanks a lot guys!

mkent · Joined: 09 Sep 2003 Posts: 37 Location: TN, USA

You could try an amplified computer speaker.

languer · Joined: 09 Jan 2004 Posts: 144 Location: USA

You could check this links in the Proton+ Forum, as they relate to the same topic.

http://www.picbasic.org/forum/showthread.php?t=2448

http://www.picbasic.org/forum/showthread.php?t=2528

Mc · Joined: 07 May 2004 Posts: 11

Thx!