!!!NEED HELP!!!add in recorder voice in 18f4520

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caltex

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hi guys,


how do i add in a pre-recorder voice in the pic....and output it out through a speaker???


many thanks for your replies......
 
Store the audio data as a table in the program memory, them read it sequentially and play it back out through a digital to analogue converter. Don't forget the low pass filter after the D2A.
 
Nigel Goodwin said:
Store the audio data as a table in the program memory, them read it sequentially and play it back out through a digital to analogue converter. Don't forget the low pass filter after the D2A.
Click to expand...


hi, i've converted the audio data to .asm table already. The problem now is, what is the code to play the audio? how shld i write it?

sorry about it.. im quite new to programming PIC
 
Read from where you store the audio data, then use external DAC, either serial or parallel interface. You may need to amplify the converter's output.
 
caltex said:
hi, i've converted the audio data to .asm table already. The problem now is, what is the code to play the audio? how shld i write it?
Click to expand...

Read first entry, output to D2A, delay for next byte.
Read second entry, output to D2A, delay for next byte.
Repeat until all done.

The delay time is dependent on your sampling rate.
 
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