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diff --git a/pd/portaudio/pablio/pablio.h b/pd/portaudio/pablio/pablio.h
new file mode 100644
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+++ b/pd/portaudio/pablio/pablio.h
@@ -0,0 +1,108 @@
+#ifndef _PABLIO_H
+#define _PABLIO_H
+
+#ifdef __cplusplus
+extern "C"
+{
+#endif /* __cplusplus */
+
+/*
+ * $Id: pablio.h,v 1.1.1.1 2002-07-29 17:06:17 ggeiger Exp $
+ * PABLIO.h
+ * Portable Audio Blocking read/write utility.
+ *
+ * Author: Phil Burk, http://www.softsynth.com/portaudio/
+ *
+ * Include file for PABLIO, the Portable Audio Blocking I/O Library.
+ * PABLIO is built on top of PortAudio, the Portable Audio Library.
+ * For more information see: http://www.audiomulch.com/portaudio/
+ * Copyright (c) 1999-2000 Ross Bencina and Phil Burk
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining
+ * a copy of this software and associated documentation files
+ * (the "Software"), to deal in the Software without restriction,
+ * including without limitation the rights to use, copy, modify, merge,
+ * publish, distribute, sublicense, and/or sell copies of the Software,
+ * and to permit persons to whom the Software is furnished to do so,
+ * subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be
+ * included in all copies or substantial portions of the Software.
+ *
+ * Any person wishing to distribute modifications to the Software is
+ * requested to send the modifications to the original developer so that
+ * they can be incorporated into the canonical version.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
+ * IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR
+ * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF
+ * CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+ * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ *
+ */
+#include <stdio.h>
+#include <stdlib.h>
+#include <math.h>
+#include "portaudio.h"
+#include "ringbuffer.h"
+#include <string.h>
+
+typedef struct
+{
+    RingBuffer   inFIFO;
+    RingBuffer   outFIFO;
+    PortAudioStream *stream;
+    int          bytesPerFrame;
+    int          samplesPerFrame;
+}
+PABLIO_Stream;
+
+/* Values for flags for OpenAudioStream(). */
+#define PABLIO_READ     (1<<0)
+#define PABLIO_WRITE    (1<<1)
+#define PABLIO_READ_WRITE    (PABLIO_READ|PABLIO_WRITE)
+#define PABLIO_MONO     (1<<2)
+#define PABLIO_STEREO   (1<<3)
+
+/************************************************************
+ * Write data to ring buffer.
+ * Will not return until all the data has been written.
+ */
+long WriteAudioStream( PABLIO_Stream *aStream, void *data, long numFrames );
+
+/************************************************************
+ * Read data from ring buffer.
+ * Will not return until all the data has been read.
+ */
+long ReadAudioStream( PABLIO_Stream *aStream, void *data, long numFrames );
+
+/************************************************************
+ * Return the number of frames that could be written to the stream without
+ * having to wait.
+ */
+long GetAudioStreamWriteable( PABLIO_Stream *aStream );
+
+/************************************************************
+ * Return the number of frames that are available to be read from the
+ * stream without having to wait.
+ */
+long GetAudioStreamReadable( PABLIO_Stream *aStream );
+
+/************************************************************
+ * Opens a PortAudio stream with default characteristics.
+ * Allocates PABLIO_Stream structure.
+ *
+ * flags parameter can be an ORed combination of:
+ *    PABLIO_READ, PABLIO_WRITE, or PABLIO_READ_WRITE,
+ */
+PaError OpenAudioStream( PABLIO_Stream **rwblPtr, double sampleRate,
+                         PaSampleFormat format, long flags );
+
+PaError CloseAudioStream( PABLIO_Stream *aStream );
+
+#ifdef __cplusplus
+}
+#endif /* __cplusplus */
+#endif /* _PABLIO_H */