snd_uaudio(4): Set hardware buffering to the minimum by default.

Improves the audio experience when using applications like
audio/jamulus and audio/hpsjam .

MFC after:	1 week
Sponsored by:	NVIDIA Networking

diff --git a/sys/dev/sound/usb/uaudio.c b/sys/dev/sound/usb/uaudio.c
index 9f2708abcd0ff6eab3a46e0fc61d06b039b65051..621fd481c8c8152765340d80bf48810ba7c84ae9 100644 (file)
--- a/sys/dev/sound/usb/uaudio.c
+++ b/sys/dev/sound/usb/uaudio.c
@@ -99,7 +99,7 @@ __FBSDID("$FreeBSD$");
 static int uaudio_default_rate = 0;            /* use rate list */
 static int uaudio_default_bits = 32;
 static int uaudio_default_channels = 0;                /* use default */
-static int uaudio_buffer_ms = 8;
+static int uaudio_buffer_ms = 2;
 static bool uaudio_handle_hid = true;
 
 static SYSCTL_NODE(_hw_usb, OID_AUTO, uaudio, CTLFLAG_RW | CTLFLAG_MPSAFE, 0,