diff --git a/hardware/audio/usb.conf b/hardware/audio/usb.conf
new file mode 100644
index 0000000..a0886d9
--- /dev/null
+++ b/hardware/audio/usb.conf
@@ -0,0 +1,25 @@
+# These are the standard aliases and dependencies.
+# This file does not need to be modified.
+
+# prevent unusual drivers from appearing as the first sound device ###########
+options snd-pcsp index=-2
+# disable for USB audio default
+#options snd-usb-audio index=-2
+#options snd-bcm2835 index=-2
+
+options cx88_alsa index=-2
+options snd-atiixp-modem index=-2
+options snd-intel8x0m index=-2
+options snd-via82xx-modem index=-2
+
+# options for USB audio default
+options snd-usb-audio index=0
+options snd-bcm2835 index=1
+options snd slots=snd-usb-audio,snd-bcm2835
+
+# work around other kernel issues ############################################
+# The EHCI driver should be loaded before the ones for low speed controllers
+# or some devices may be confused when they are disconnected and reconnected.
+softdep uhci-hcd pre: ehci-hcd
+softdep ohci-hcd pre: ehci-hcd
+