diff --git a/build.gradle b/build.gradle
index b9cd0e5..1307a0a 100644
--- a/build.gradle
+++ b/build.gradle
@@ -4,7 +4,7 @@ plugins {
 }
 
 group 'io.github.mzdluo123'
-version '1.0'
+version '1.1-dev'
 
 repositories {
     mavenCentral()
diff --git a/src/main/java/io/github/mzdluo123/silk4j/AudioUtils.java b/src/main/java/io/github/mzdluo123/silk4j/AudioUtils.java
index 3ae290c..fed2e66 100644
--- a/src/main/java/io/github/mzdluo123/silk4j/AudioUtils.java
+++ b/src/main/java/io/github/mzdluo123/silk4j/AudioUtils.java
@@ -20,43 +20,57 @@ public static void init(File tmpDir) throws IOException {
         NativeLibLoader.load();
     }
 
-    public static File mp3ToSilk(File mp3File) throws IOException {
+    public static File mp3ToSilk(File mp3File, int bitRate) throws IOException {
         if (!mp3File.exists() || mp3File.length() == 0) {
             throw new IOException("文件不存在或为空");
         }
         File pcmFile = getTempFile("pcm");
         File silkFile = getTempFile("silk");
-        int bitrate = LameCoder.decode(mp3File.getAbsolutePath(), pcmFile.getAbsolutePath());
-        SilkCoder.encode(pcmFile.getAbsolutePath(), silkFile.getAbsolutePath(), bitrate);
+        int sampleRate = LameCoder.decode(mp3File.getAbsolutePath(), pcmFile.getAbsolutePath());
+        SilkCoder.encode(pcmFile.getAbsolutePath(), silkFile.getAbsolutePath(), sampleRate, bitRate);
         pcmFile.delete();
         return silkFile;
     }
 
-    public static File mp3ToSilk(InputStream mp3FileStream) throws IOException {
+    public static File mp3ToSilk(File mp3File) throws IOException {
+        return mp3ToSilk(mp3File,24000);
+    }
 
+    public static File mp3ToSilk(InputStream mp3FileStream, int bitRate) throws IOException {
         File mp3File = getTempFile("mp3");
         streamToTempFile(mp3FileStream, mp3File);
-        return mp3ToSilk(mp3File);
+        return mp3ToSilk(mp3File, bitRate);
     }
 
-    public static File silkToMp3(File silkFile) throws IOException {
+    public static File mp3ToSilk(InputStream mp3FileStream) throws IOException {
+        return mp3ToSilk(mp3FileStream,24000);
+    }
+
+    public static File silkToMp3(File silkFile, int bitrate) throws IOException {
         if (!silkFile.exists() || silkFile.length() == 0) {
             throw new IOException("文件不存在或为空");
         }
         File pcmFile = getTempFile("pcm");
         File mp3File = getTempFile("mp3");
         SilkCoder.decode(silkFile.getAbsolutePath(), pcmFile.getAbsolutePath());
-        LameCoder.encode(pcmFile.getAbsolutePath(), mp3File.getAbsolutePath(), 24000);
+        LameCoder.encode(pcmFile.getAbsolutePath(), mp3File.getAbsolutePath(), bitrate);
         pcmFile.delete();
         return mp3File;
     }
 
-    public static File silkToMp3(InputStream silkFileStream) throws IOException {
+    public static File silkToMp3(File silkFile) throws IOException {
+        return silkToMp3(silkFile, 24000);
+    }
+
+    public static File silkToMp3(InputStream silkFileStream, int bitrate) throws IOException {
         File mp3File = getTempFile("silk");
         streamToTempFile(silkFileStream, mp3File);
-        return silkToMp3(mp3File);
+        return silkToMp3(mp3File, bitrate);
     }
 
+    public static File silkToMp3(InputStream silkFileStream) throws IOException {
+        return silkToMp3(silkFileStream, 24000);
+    }
 
     static void streamToTempFile(InputStream inputStream, File tmpFile) throws IOException {
         FileOutputStream fileOutputStream = new FileOutputStream(tmpFile);
diff --git a/src/main/java/io/github/mzdluo123/silk4j/SilkCoder.java b/src/main/java/io/github/mzdluo123/silk4j/SilkCoder.java
index 0d1916a..f6899bf 100644
--- a/src/main/java/io/github/mzdluo123/silk4j/SilkCoder.java
+++ b/src/main/java/io/github/mzdluo123/silk4j/SilkCoder.java
@@ -23,7 +23,9 @@ public static native void encode(String source,
                                      int bitRate);
 
     public static void encode(String source,
-                              String dest, int sampleRate
+                              String dest,
+                              int sampleRate,
+                              int bitRate
     ) {
         encode(source,
                 dest, true,
@@ -34,7 +36,14 @@ public static void encode(String source,
                 0,
                 0,
                 2,
-                16000);
+                bitRate);
+    }
+
+    public static void encode(String source,
+                              String dest,
+                              int sampleRate
+    ){
+        encode(source, dest, sampleRate, 24000);
     }
 
 }