From d31057b1b1d457bec0259306145bbdbd6e58ba3e Mon Sep 17 00:00:00 2001
From: MeowOS <meowos@local>
Date: Tue, 1 Sep 2026 13:34:58 +0800
Subject: [PATCH] =?UTF-8?q?fix(audio):=20CS43198=20=E9=9F=B3=E9=87=8F?=
 =?UTF-8?q?=E5=AF=84=E5=AD=98=E5=99=A8=3D=E8=A1=B0=E5=87=8F=E9=87=8F(0?=
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 =?UTF-8?q?ncher/audio.c+audiod+watchdog+SDK=20vol)=E7=BB=9F=E4=B8=80?=
 =?UTF-8?q?=E5=8F=8D=E8=BD=AC=E6=98=A0=E5=B0=84=20dac=3D255-pct*255/100=20?=
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---
 meow_ui_vol.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/meow_ui_vol.c b/meow_ui_vol.c
index fdcff49..6269bad 100644
--- a/meow_ui_vol.c
+++ b/meow_ui_vol.c
@@ -110,7 +110,7 @@ int meow_ui_vol_step(const char *path, int dir)
  * 与 launcher meow_dac_vol_write / watchdog wd_vol_write 完全同路径（语义同源）。 */
 void meow_ui_vol_dac_write(int pct)
 {
-    int dac = pct * 255 / 100;
+    int dac = 255 - pct * 255 / 100;   /* CS43198 寄存器=衰减量(0=最响 255=静音)，用户 pct 越大越响 → 反转映射 */
     if (dac < 0) dac = 0;
     if (dac > 255) dac = 255;
     char cmd[160];