how i made sound from music files

a · Guest

how i made sound from music files(examples .wav, .mp3 or other files) or create music in Pic16f877
i used to read sourcecode(ex_tones.c)
but
// NOTE FREQUENCY
// Octave0 Octave1 Octave2 Octave3
const long C_NOTE[4] ={ 262, 523, 1047, 2093};
const long Db_NOTE[4] ={ 277, 554, 1109, 2217};
const long D_NOTE[4] ={ 294, 587, 1175, 2349};
const long Eb_NOTE[4] ={ 311, 622, 1245, 2489};
const long E_NOTE[4] ={ 330, 659, 1329, 2637};
const long F_NOTE[4] ={ 349, 698, 1397, 2794};
const long Gb_NOTE[4] ={ 370, 740, 1480, 2960};
const long G_NOTE[4] ={ 392, 784, 1568, 3136};
const long Ab_NOTE[4] ={ 415, 831, 1661, 3322};
const long A_NOTE[4] ={ 440, 880, 1760, 3520};
const long Bb_NOTE[4] ={ 466, 923, 1865, 3729};
const long B_NOTE[4] ={ 494, 988, 1976, 3951};
....
....
....
void generate_tone(long frequency, long duration)

but can i know duration time from music files (examples .wav, .mp3 or other files)

Please help me.

Guest · Posted: Wed Feb 18, 2004 9:32 am

There is a DOS- Software which inputs wav- files and creates a retlw-table for a sort of pwm output in a pic.
You can found it at www.romanblack.com .
Hope this helps.

Thomas

a · Guest

if i have note of music. How i know duration which i should fill in duration variable. thank you for all help. i will download software that u ask me.

Spiffy · Joined: 21 Jan 2004 Posts: 12

What is this program from what I can understand it can generate a frequency that sounds like a music note and you reproduce a song???
or is it the real song thats reproduced??

Neutone · Joined: 08 Sep 2003 Posts: 839 Location: Houston

Kind of like sheet music.

hobiadami · Joined: 17 Oct 2006 Posts: 35 Location: City of Concrete

I want to generate a very simple sound like "hey", "stop", "jump" or anything similar.

it seems logical to use roman black's nice software (Thanks Roman!).

The software generates asm code of retlw instructions. How can i use that asm instructions in my CCS C program?

i wonder whether it is possible to generate that very simple syllable with a simple controller like the 16F628. I wonder did anyone tried that before?
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PCM programmer · Joined: 06 Sep 2003 Posts: 21708

You can type the data into an array. For example, here's the first
16 bytes of data generated by Roman's program for his Dick09.wav file.

hobiadami · Joined: 17 Oct 2006 Posts: 35 Location: City of Concrete

Then it is only a matter of typing the codes generated by rowans's program. I wonder what is the max duration of sound which can be produced with the data a pic16F628's 2kword program memory can hold.
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JED · Joined: 13 Jul 2006 Posts: 8

Hi, over the past weekend I was playing with a similar project. I used winhex a program referred to on other post on this form(see link), to manipulate a .wav file. Using windows sound recorder i created an 8 bit 8 KHz mono PMC .wav file. This was then imported into win hex to strip off the header and preserve only the raw sound data. winhex has a utility to export the data to a c code formatted array. To play the .wav on the pic a entry of the array is fed into the duty cycle of the PIC�s PWM module every 125uS. Using only a 220uF cap to ac couple an 8 ohm speaker made for a very crude talking PIC. I�m sure a low pass filter is necessary to get rid of the high frequencies present in the square wave PWM output. This method is simple but a huge memory hog. Using an 18f2455 I could only get a few seconds of sound (@8000 sample/second).
[/url]http://www.ccsinfo.com/forum/viewtopic.php?t=25702&highlight=winhex[/url][/url]

hobiadami · Joined: 17 Oct 2006 Posts: 35 Location: City of Concrete

Hi Jed,

can you post some working code here for me to test in proteus?

thanks.
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