diff --git a/audio-processors/src/commonMain/kotlin/com/eimsound/audioprocessor/Renderer.kt b/audio-processors/src/commonMain/kotlin/com/eimsound/audioprocessor/Renderer.kt
index ffa2d131..05c9e39e 100644
--- a/audio-processors/src/commonMain/kotlin/com/eimsound/audioprocessor/Renderer.kt
+++ b/audio-processors/src/commonMain/kotlin/com/eimsound/audioprocessor/Renderer.kt
@@ -10,7 +10,8 @@ interface Renderable {
     fun onRenderEnd()
 }
 
-enum class RenderFormat(val extend: String, val isLossLess: Boolean = true) {
+@Suppress("unused")
+enum class RenderFormat(val extension: String, val isLossLess: Boolean = true) {
     WAV("wav"),
     MP3("mp3", false),
     FLAC("flac"),
diff --git a/daw/src/jvmMain/kotlin/com/eimsound/daw/impl/clips/audio/AudioClipImpl.kt b/daw/src/jvmMain/kotlin/com/eimsound/daw/impl/clips/audio/AudioClipImpl.kt
index 38fc1466..9af3e7b8 100644
--- a/daw/src/jvmMain/kotlin/com/eimsound/daw/impl/clips/audio/AudioClipImpl.kt
+++ b/daw/src/jvmMain/kotlin/com/eimsound/daw/impl/clips/audio/AudioClipImpl.kt
@@ -179,12 +179,17 @@ class AudioClipImpl(
         val offset = if (playTime < 0) {
             time = 0
             position = 0
+            lastPos = -1
             (pos.bufferSize + playTime).coerceAtLeast(0).toInt()
         } else 0
         if (tr == null || tr.isDefaultParams) {
+            if (pos.timeInSamples != lastPos + bufferSize) {
+                position = time
+            }
             target.getSamples(position, offset, bufferSize, buffers)
             position += bufferSize
             pauseProcessor.processPause(buffers, offset, bufferSize, pos.timeToPause)
+            lastPos = pos.timeInSamples
             return
         } else if (pos.timeInSamples != lastPos + bufferSize) {
             position = (time * tr.speedRatio).roundToLong()
diff --git a/daw/src/jvmMain/kotlin/com/eimsound/daw/window/dialogs/RenderDialog.kt b/daw/src/jvmMain/kotlin/com/eimsound/daw/window/dialogs/RenderDialog.kt
index 2171d8d7..731d38f2 100644
--- a/daw/src/jvmMain/kotlin/com/eimsound/daw/window/dialogs/RenderDialog.kt
+++ b/daw/src/jvmMain/kotlin/com/eimsound/daw/window/dialogs/RenderDialog.kt
@@ -111,11 +111,11 @@ val ExportDialog = @Composable {
                                                 },
                                                 renderFormat == it,
                                                 modifier = Modifier.fillMaxWidth()
-                                            ) { Text(it.extend) }
+                                            ) { Text(it.extension) }
                                         }
                                     }) {
                                         Text(
-                                            renderFormat.extend
+                                            renderFormat.extension
                                         )
                                     }
                                 }
@@ -183,7 +183,7 @@ val ExportDialog = @Composable {
                             }
 
 
-                            if (renderFormat.extend == "flac") {
+                            if (renderFormat.extension == "flac") {
                                 Spacer(Modifier.width(10.dp))
                                 Row(
                                     verticalAlignment = Alignment.CenterVertically,
@@ -231,7 +231,7 @@ val ExportDialog = @Composable {
                                 if (filename.isEmpty()) return@Button
                                 val renderer = EchoInMirror.bus?.let { JvmRenderer(it) }
                                 val curPosition = EchoInMirror.currentPosition
-                                val audioFile = File("./${filename}.${renderFormat.extend}")
+                                val audioFile = File("./${filename}.${renderFormat.extension}")
 
                                 isRendering = true
                                 renderStartTime = System.currentTimeMillis()
@@ -273,7 +273,7 @@ val ExportDialog = @Composable {
                             Row {
                                 if (isRendering && renderProcess < 1f) Text("取消")
                                 else if (isRendering && renderProcess >= 1f) Text("确认")
-                                else Text("导出到 $filename.${renderFormat.extend}")
+                                else Text("导出到 $filename.${renderFormat.extension}")
                             }
                         }
                     }
diff --git a/dsp/src/commonMain/kotlin/com/eimsound/dsp/data/AudioThumbnail.kt b/dsp/src/commonMain/kotlin/com/eimsound/dsp/data/AudioThumbnail.kt
index 27d421aa..189ea555 100644
--- a/dsp/src/commonMain/kotlin/com/eimsound/dsp/data/AudioThumbnail.kt
+++ b/dsp/src/commonMain/kotlin/com/eimsound/dsp/data/AudioThumbnail.kt
@@ -12,8 +12,8 @@ import kotlinx.coroutines.launch
 import org.mapdb.DBMaker
 import org.mapdb.HTreeMap
 import java.io.File
-import java.io.IOException
 import java.nio.ByteBuffer
+import java.nio.ByteOrder
 import java.nio.file.Files
 import java.nio.file.Path
 import java.nio.file.Paths
@@ -82,16 +82,15 @@ class AudioThumbnail private constructor(
         }
     }
 
-    @OptIn(DelicateCoroutinesApi::class)
-    constructor(data: ByteBuffer): this(data.long, data.get().toInt(), data.long, data.float, data.int, data.int) {
-        GlobalScope.launch(Dispatchers.IO) {
-            repeat(channels) {
-                data.get(minTree[it], 1, size)
-                data.get(maxTree[it], 1, size)
-            }
-            buildTree()
-            modification++
+    constructor(data: ByteBuffer): this(
+        data.order(ByteOrder.LITTLE_ENDIAN).long, data.get().toInt(), data.long, data.float, data.int, data.int
+    ) {
+        repeat(channels) {
+            data.get(minTree[it], 1, size)
+            data.get(maxTree[it], 1, size)
         }
+        buildTree()
+        modification++
     }
 
     fun read() { modification }
@@ -153,7 +152,7 @@ class AudioThumbnail private constructor(
     }
 
     fun toByteArray(): ByteArray {
-        val data = ByteBuffer.allocate(29 + channels * size * 2)
+        val data = ByteBuffer.allocate(29 + channels * size * 2).order(ByteOrder.LITTLE_ENDIAN)
             .putLong(modifiedTime) // 8
             .put(channels.toByte()) // 1
             .putLong(lengthInSamples) // 8
@@ -175,11 +174,10 @@ class AudioThumbnail private constructor(
 }
 
 class AudioThumbnailCache(
-    file: File, private val samplesPerThumbSample: Int = DEFAULT_SAMPLES_PRE_THUMB_SAMPLE
+    private val file: File, private val samplesPerThumbSample: Int = DEFAULT_SAMPLES_PRE_THUMB_SAMPLE
 ): AutoCloseable {
     @Suppress("UNCHECKED_CAST")
-    private val db = DBMaker.fileDB(file).fileMmapEnableIfSupported().closeOnJvmShutdown().make()
-        .hashMap("audioThumbnails").expireMaxSize(200).createOrOpen() as HTreeMap<String, ByteArray>
+    private val db = DBMaker.memoryDB().make().hashMap("audioThumbnails").expireMaxSize(200).createOrOpen() as HTreeMap<String, ByteArray>
 
     operator fun get(key: String) = db[key]?.let { AudioThumbnail(ByteBuffer.wrap(it)) }
     operator fun set(key: String, time: Long = Files.getLastModifiedTime(Paths.get(key)).toMillis(), value: AudioThumbnail) {
@@ -211,7 +209,7 @@ class AudioThumbnailCache(
             )
             set(file.toString(), time, value)
             return value
-        } catch (e: IOException) {
+        } catch (e: Throwable) {
             e.printStackTrace()
             onComplete?.invoke(e)
             return null