English Amiga Board - View Single Post - [PROJECT] ProTracker v2.3D clone for modern platforms

8bitbubsy · 30 August 2010, 20:59

Hum... Let me check into that, give me a moment. Probably a bit manipulation issue.

EDIT:

For the quadrascopes, on line 29 in "pt_visuals.c" change:
_y += ((~v[i].data[fracPos] * (v[i].vol >> 1)) >> 8);
to:
_y += ((~v[i].data[fracPos] * (v[i].vol / 2)) / 256);

The C compilers should do bitshifting according to its endianness, but maybe they don't. I have more to learn on that point!
See if it helps. If it does, I have a lot of code to change!

Regarding the noisy sound in your build: The audio samples get divided by 128 before output, but on your side they might get multiplied with 128

30 August 2010, 20:59	#9
8bitbubsy Registered User Join Date: Sep 2009 Location: Norway Posts: 1,711	Hum... Let me check into that, give me a moment. Probably a bit manipulation issue. EDIT: For the quadrascopes, on line 29 in "pt_visuals.c" change: _y += ((~v[i].data[fracPos] * (v[i].vol >> 1)) >> 8); to: _y += ((~v[i].data[fracPos] * (v[i].vol / 2)) / 256); The C compilers should do bitshifting according to its endianness, but maybe they don't. I have more to learn on that point! See if it helps. If it does, I have a lot of code to change! Regarding the noisy sound in your build: The audio samples get divided by 128 before output, but on your side they might get multiplied with 128 Last edited by 8bitbubsy; 30 August 2010 at 21:40.