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diff --git a/arm-fm-22k/lib_src/eas_audioconst.h b/arm-fm-22k/lib_src/eas_audioconst.h
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+/*----------------------------------------------------------------------------
+ *
+ * File: 
+ * eas_audioconst.h
+ *
+ * Contents and purpose:
+ * Defines audio constants related to the sample rate, bit size, etc.
+ *
+ *
+ * Copyright Sonic Network Inc. 2005
+
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ *----------------------------------------------------------------------------
+ * Revision Control:
+ *   $Revision: 82 $
+ *   $Date: 2006-07-10 11:45:19 -0700 (Mon, 10 Jul 2006) $
+ *----------------------------------------------------------------------------
+*/
+
+#ifndef _EAS_AUDIOCONST_H
+#define _EAS_AUDIOCONST_H
+
+/*----------------------------------------------------------------------------
+ * These macros define the various characteristics of the defined sample rates
+ *----------------------------------------------------------------------------
+ * BUFFER_SIZE_IN_MONO_SAMPLES	size of buffer in samples
+ * _OUTPUT_SAMPLE_RATE			compiled output sample rate
+ * AUDIO_FRAME_LENGTH			length of an audio frame in 256ths of a millisecond
+ * SYNTH_UPDATE_PERIOD_IN_BITS	length of an audio frame (2^x samples)
+ *----------------------------------------------------------------------------
+*/
+
+#if	defined (_SAMPLE_RATE_8000)
+#define BUFFER_SIZE_IN_MONO_SAMPLES		32
+#define _OUTPUT_SAMPLE_RATE 			8000
+#define AUDIO_FRAME_LENGTH				1024
+#define SYNTH_UPDATE_PERIOD_IN_BITS		5
+
+#elif defined (_SAMPLE_RATE_16000)
+#define BUFFER_SIZE_IN_MONO_SAMPLES		64
+#define _OUTPUT_SAMPLE_RATE				16000
+#define AUDIO_FRAME_LENGTH				1024
+#define SYNTH_UPDATE_PERIOD_IN_BITS		6
+
+#elif defined (_SAMPLE_RATE_20000)
+#define BUFFER_SIZE_IN_MONO_SAMPLES		128
+#define _OUTPUT_SAMPLE_RATE				20000
+#define AUDIO_FRAME_LENGTH				1638
+#define SYNTH_UPDATE_PERIOD_IN_BITS		7
+
+#elif defined (_SAMPLE_RATE_22050)
+#define BUFFER_SIZE_IN_MONO_SAMPLES		128
+#define _OUTPUT_SAMPLE_RATE				22050
+#define AUDIO_FRAME_LENGTH				1486
+#define SYNTH_UPDATE_PERIOD_IN_BITS		7
+
+#elif defined (_SAMPLE_RATE_24000)
+#define BUFFER_SIZE_IN_MONO_SAMPLES		128
+#define _OUTPUT_SAMPLE_RATE				24000
+#define AUDIO_FRAME_LENGTH				1365
+#define SYNTH_UPDATE_PERIOD_IN_BITS		7
+
+#elif defined (_SAMPLE_RATE_32000)
+#define BUFFER_SIZE_IN_MONO_SAMPLES		128
+#define _OUTPUT_SAMPLE_RATE				32000
+#define AUDIO_FRAME_LENGTH				1024
+#define SYNTH_UPDATE_PERIOD_IN_BITS		7
+
+#elif defined (_SAMPLE_RATE_44100)
+#define BUFFER_SIZE_IN_MONO_SAMPLES		256
+#define _OUTPUT_SAMPLE_RATE				44100
+#define AUDIO_FRAME_LENGTH				1486
+#define SYNTH_UPDATE_PERIOD_IN_BITS		8
+
+#elif defined (_SAMPLE_RATE_48000)
+#define BUFFER_SIZE_IN_MONO_SAMPLES		256
+#define _OUTPUT_SAMPLE_RATE				48000
+#define AUDIO_FRAME_LENGTH				1365
+#define SYNTH_UPDATE_PERIOD_IN_BITS		8
+
+#else
+#error "_SAMPLE_RATE_XXXXX must be defined to valid rate"
+#endif
+
+#endif /* #ifndef _EAS_AUDIOCONST_H */
+