Decrease the initial audio buffer size that implicitly limits the number
of records blocks.
--- a/dev/audio.c
+++ b/dev/audio.c
@@ -55,7 +55,7 @@
 #define AUDIO_DEV(n)		(minor(n) & 0xf0)
 #define AUDIO_DEV_AUDIO		0	/* minor of /dev/audio0 */
 #define AUDIO_DEV_AUDIOCTL	0xc0	/* minor of /dev/audioctl */
-#define AUDIO_BUFSZ		65536	/* buffer size in bytes */
+#define AUDIO_BUFSZ		4096	/* buffer size in bytes */
 
 /*
  * mixer entries added by the audio(4) layer