添加asound.conf

env/rootfs/etc/asound.conf

@@ -0,0 +1,101 @@
+pcm.!default {
+    type plug
+    slave.pcm "default_playback"
+}
+pcm.default_playback {
+    type softvol
+    slave {
+        pcm "xa8326"
+    }
+    control {
+        name "default_playback"
+        card 1
+    }
+    min_dB -40.0
+    max_dB 0.0
+    resolution 100
+}
+
+pcm.bg_playback {
+    type softvol
+    slave {
+        pcm "xa8326"
+    }
+    control {
+        name "bg_playback"
+        card 1
+    }
+    min_dB -40.0
+    max_dB 0.0
+    resolution 100
+}
+
+# 放音设备
+pcm.xa8326 {
+    type plug
+    slave {
+        pcm {
+            type dmix
+            ipc_key 321456  # any unique value
+            ipc_key_add_uid true
+            slave {
+                pcm "hw:2,0"
+                period_time 100000 # 100ms
+                format S16_LE
+                channels 2
+            }
+        }
+        rate 48000
+        format S16_LE
+        channels 2
+    }
+}
+
+# 录音设备
+pcm.__recorder {
+    type multi
+    slaves.xa8326.pcm "hw:2,0"
+    slaves.xa8326.channels 2
+    slaves.pdm.pcm "hw:1,0"
+    slaves.pdm.channels 8
+
+    bindings.0.slave pdm
+    bindings.0.channel 0
+
+    bindings.1.slave pdm
+    bindings.1.channel 1
+
+    bindings.2.slave pdm
+    bindings.2.channel 2
+
+    bindings.3.slave pdm
+    bindings.3.channel 3
+
+    bindings.4.slave pdm
+    bindings.4.channel 4
+    
+    bindings.5.slave pdm
+    bindings.5.channel 5
+
+    bindings.6.slave pdm
+    bindings.6.channel 6
+
+    bindings.7.slave pdm
+    bindings.7.channel 7
+
+    bindings.8.slave xa8326
+    bindings.8.channel 0
+
+    bindings.9.slave xa8326
+    bindings.9.channel 1    
+}
+# 重采样
+pcm.recorder {
+    type plug
+    slave {
+        pcm "__recorder"
+        rate 48000
+        format S16_LE
+        channels 10
+    }
+}