From f4faefc8e595a488aef541a1aac6b4d389162a11 Mon Sep 17 00:00:00 2001
From: Steven Dan <guang1025@163.com>
Date: Wed, 20 May 2026 16:14:52 +0800
Subject: [PATCH] increase 4d adc gain

---
 .../app_usb_aud_phaten_golden_6ch/src/extensions/audiohw.xc     | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/sw_usb_audio/app_usb_aud_phaten_golden_6ch/src/extensions/audiohw.xc b/sw_usb_audio/app_usb_aud_phaten_golden_6ch/src/extensions/audiohw.xc
index 6653234..92500b9 100644
--- a/sw_usb_audio/app_usb_aud_phaten_golden_6ch/src/extensions/audiohw.xc
+++ b/sw_usb_audio/app_usb_aud_phaten_golden_6ch/src/extensions/audiohw.xc
@@ -382,7 +382,7 @@ void mic_volume(unsigned level)
     {
         // 改动原因：移除旧版37~38寄存器额外数字增益路径，最大限制到24dB（1~24，1dB/步）。
         debug_printf("mic_volume write reg=%d\n", level);
-        unsafe {NAU88C22_REGWRITE(0x007E, (level << 8), (client interface i2c_master_if)i_i2c_client);}
+        unsafe {NAU88C22_REGWRITE(0x007E, ((level + 4) << 8), (client interface i2c_master_if)i_i2c_client);}
         unsafe {NAU88C22_REGWRITE(0x0035, (0xcfcf), (client interface i2c_master_if)i_i2c_client);}
     }
 }