Play sound with a MCU.

[xxtigerxx]

i want to play a sound with a mega88 mcu.

I want to store the sound in a memory (fix memory) and play the sound.

The mcu has only pwm does not have a DAC.

Does anyone have a algorithm and a schematic how to implement this

Thanks in advance.

 

[srikanthsamaga]

Low quality sound can be produced by square wave without using DAC.

 

[xxtigerxx]

i do not want a very good quality. i want to send the voice throw the telephone line.

So maximum frequency 4kHz.

 

[srikanthsamaga]

I have produced some tones with 8051 long back using square waves, but IMO its bit hard to produce voice using square waves, because of variable amplitude present in voice.

 

[Tahmid]

Hi,

Read through these, you will get a lot of valuable information:
AVR Freaks :: View topic - Atmega audio playback
ELM - Simple SD Audio Player with an 8-pin IC

Hope this helps.
Tahmid.

 

[hongphuc118]

You can use DAC 0808 to connect to MCU