From my point of view youre not missing a thing. snd_tune seems to be broken. Here is a small compileable example that demonstrates the issue:

Code:
#include <acknex.h>

void main()
{
	SOUND* snd = snd_create("#1");
	fixed handle = snd_loop(snd,100,0);
	while (1)
	{
		fixed balance = cosv(total_ticks * 10) * 99;
		snd_tune(handle,100,100,balance);
		DEBUG_VAR(handle,0);
		DEBUG_VAR(balance,50);
		wait(1);
	}
}


Keep in mind you can only use mono sounds. Stereo sounds are not yet supported.

Wanna post in the bugs forum? Or shall I? I have the current beta installed. I can also post in the beta forum.

Always learn from history, to be sure you make the same mistakes again...