* [9front] games/gb: fix reversed audio channels
@ 2021-02-08 0:12 Michael Forney
2021-02-08 4:02 ` qwx
0 siblings, 1 reply; 2+ messages in thread
From: Michael Forney @ 2021-02-08 0:12 UTC (permalink / raw)
To: 9front
The high bits correspond to the left channel, and the low bits to the
right channel.
Reference: https://gbdev.io/pandocs/#sound-control-registers
diff 3fc115a6ff6eef65210fb78a51128958d2b55910 9d0249f7a978b4e84f3cd9083f787b4f3f533b41
--- a/sys/src/games/gb/apu.c Sun Feb 7 15:22:39 2021
+++ b/sys/src/games/gb/apu.c Sun Feb 7 16:12:28 2021
@@ -115,13 +115,13 @@
if(i == 2 ? ((reg[NR30] & 0x80) == 0) : ((*sndch[i].env & 0xf8) == 0))
continue;
v = sndch[i].samp * 2 - 15;
- if((cnth & 1<<i) != 0)
- ov0 += v;
if((cnth & 1<<4<<i) != 0)
+ ov0 += v;
+ if((cnth & 1<<i) != 0)
ov1 += v;
}
- ov0 *= 1 + (cntl & 7);
- ov1 *= 1 + (cntl >> 4 & 7);
+ ov0 *= 1 + (cntl >> 4 & 7);
+ ov1 *= 1 + (cntl & 7);
}
static void
^ permalink raw reply [flat|nested] 2+ messages in thread
end of thread, other threads:[~2021-02-08 8:15 UTC | newest]
Thread overview: 2+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2021-02-08 0:12 [9front] games/gb: fix reversed audio channels Michael Forney
2021-02-08 4:02 ` qwx
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).