It doesn't recognize "OC8RS" so it definitely has a different name, I'm just having a tough time finding it.

This is what sucks about having a zillion versions of header files, the best thing to do is look in the data sheet, and then do a grep thru the header file for "OC" and "output comapare" and hopefully, you can find the header section that defines these names..

Andre'

Eviscerate Core,

To test my sound driver i used your sound files. They played nicely in my hardware. Is there any way I could get my hands on your (compiled) C# program to convert wav files to unsigned char arrays? can it downsample?

My game is kinda dull without sounds.

Thanks

On the topic of sound, I found this Boulder Dash game someone created for the PIC18 that supports VGA and a 4 voice sound player. I think this would be worth looking into just for the sound routines alone.

http://www.pic24.ru/doku.php/en/osa/articles/vga_game

To s4w2099, my program is stripped apart right now as I am experimenting with different ways to do the audio. It doesn't even save as arrays anymore, but I'll try to find the time to get it working this weekend. When I finish all my drivers, I'll eventually release a fully functioning version of the program. That's not going to be for a while though.

To JT, thanks for the post. I checked out the code, and there are definitely some neat routines going on in that game. I like how he made note lists for the music, and his program reads through it. I want to attempt something similar to that, but using sampled sounds. So say I have a trumpet sample of middle C, I want to be able to play that sample back at varying frequency to reproduce entire octaves.

Someone port this to the XGS PIC-16!!!

Andre'

Nice, thanks.

I remembered a great tool to do something similar. A while ago I took a class on basic DSP. We used MATLAB, to process the audio. Then, what I did was to download a MATLAB knock off (open-source) that has some functions to read/write and process wav files. This program is called Octave. Since this is a math program its easy to scale, downsample and manipulate the data. Sure, you can also plot it to see what it looks like, FFT and all.

Here is the code I run from Octave's console:

[y, Fs, bits] = wavread('siren.wav');
y=y.*100;
y=y+abs(min(y));
fp=fopen('output.txt', 'w');
fprintf(fp, '%d, ', y);
fclose(fp);

It is pretty obvious what it does. Reads a wav file into an array called 'y', then it multiplies the array by 100 (thats my volume), then it shifts all the data above the y axis (no negative values), then it simply dumps all the data as integer to the file output.txt

The result is a very nice sound. I guess it could be better though. The wav file sounds a lot better when played in the computer. But it is a start.

BTW JT:

Thanks for the link, that guy is very good. It is a very nice, tight little program. Sounded very decent in the video.

I haven't heard of that one -- looks like C syntax, that's pretty cool

Andre'

Yes, C syntax for many things. The most common C IO functions are supported by MATLAB/octave like printf, fprintf etc. They are really cool because you can use them to format your output as wished.

Octave is just the free open source version that mimics matlab.

Kind of like open office is to Microsoft office.