play audio from sd card using avr mcu(atmega-)

I want to play audio from sd card using avr microcontroller.audio file will be called by it's file name.I want to just play by audio file name.

It's crying need to complete my voice clock project.

please help ...

Look up 'DFPlayer Mini', a small and cheap MP3 player module that easily interfaces to a micro-controller for doing exactly what you want.

Here's an example that does almost everything you're wanting to do:

http://www.trainelectronics.com/Arduino/MP3Sound/TalkingTemperature/