diff --git a/Legacy/CrossNet/AudioADP.cs b/Legacy/CrossNet/AudioADP.cs
new file mode 100644
index 00000000..93363ace
--- /dev/null
+++ b/Legacy/CrossNet/AudioADP.cs
@@ -0,0 +1,155 @@
+//! \file AudioADP.cs
+//! \date 2017 Dec 29
+//! \brief CrossNet ADPCM-compressed audio.
+//
+// Copyright (C) 2017 by morkt
+//
+// 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.
+//
+// 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.
+//
+
+using System.ComponentModel.Composition;
+using System.IO;
+using GameRes.Utility;
+
+namespace GameRes.Formats.CrossNet
+{
+ [Export(typeof(AudioFormat))]
+ public class AdpAudio : AudioFormat
+ {
+ public override string Tag { get { return "ADP/CROSSNET"; } }
+ public override string Description { get { return "CrossNet ADPCM-compressed audio"; } }
+ public override uint Signature { get { return 0; } }
+ public override bool CanWrite { get { return false; } }
+
+ public override SoundInput TryOpen (IBinaryStream file)
+ {
+ if (file.Signature != Wav.Signature || !file.Name.HasExtension (".adp"))
+ return null;
+
+ var header = file.ReadHeader (0x24);
+ if (!header.AsciiEqual (8, "WAVEfmt "))
+ return null;
+ uint fmt_size = header.ToUInt32 (0x10);
+ int codec = header.ToUInt16 (0x14);
+ if (0xFFFF != codec)
+ return null;
+
+ uint sample_rate = header.ToUInt32 (0x18);
+ ushort channels = header.ToUInt16 (0x16);
+ if (channels != 1 && channels != 2)
+ return null;
+
+ int shift = 2;
+ uint section_offset = 0x14 + fmt_size;
+ uint section_size;
+ for (;;)
+ {
+ file.Position = section_offset;
+ uint section_id = file.ReadUInt32();
+ section_size = file.ReadUInt32();
+ if (section_id == 0x61746164) // 'data'
+ break;
+ if (section_id == 0x74666873) // 'shft'
+ shift = file.ReadInt32();
+ section_offset += 8 + ((section_size + 1u) & ~1u);
+ }
+ int samples = (int)(2 * section_size / channels);
+ if (shift < 0)
+ shift = 2;
+ var output = new byte[samples * 2 * channels];
+ var first = new AdpDecoder (shift);
+ int dst = 0;
+ if (1 == channels)
+ {
+ while (samples > 0)
+ {
+ byte v = file.ReadUInt8();
+ LittleEndian.Pack (first.DecodeSample (v), output, dst);
+ LittleEndian.Pack (first.DecodeSample (v >> 4), output, dst+2);
+ dst += 4;
+ samples -= 2;
+ }
+ }
+ else
+ {
+ var second = new AdpDecoder (shift);
+ while (samples > 0)
+ {
+ byte v = file.ReadUInt8();
+ LittleEndian.Pack (first.DecodeSample (v), output, dst);
+ LittleEndian.Pack (first.DecodeSample (v >> 4), output, dst+4);
+ v = file.ReadUInt8();
+ LittleEndian.Pack (second.DecodeSample (v), output, dst+2);
+ LittleEndian.Pack (second.DecodeSample (v >> 4), output, dst+6);
+ dst += 8;
+ samples -= 2;
+ }
+ }
+ var format = new WaveFormat();
+ format.FormatTag = 1;
+ format.Channels = channels;
+ format.SamplesPerSecond = sample_rate;
+ format.AverageBytesPerSecond = 2u * channels * sample_rate;
+ format.BlockAlign = (ushort)(2 * channels);
+ format.BitsPerSample = 0x10;
+ var pcm = new MemoryStream (output);
+ var sound = new RawPcmInput (pcm, format);
+ file.Dispose();
+ return sound;
+ }
+ }
+
+ internal class AdpDecoder
+ {
+ int prev_sample = 0;
+ int quant_idx = 0;
+ int shift;
+
+ public AdpDecoder (int shift = 2)
+ {
+ this.shift = shift;
+ }
+
+ public short DecodeSample (int code)
+ {
+ code &= 0xF;
+ int sample = (ScaleTable[code] * QuantizeTable[quant_idx] << shift) + prev_sample;
+ if (sample < -32768 )
+ sample = -32768;
+ else if (sample > 0x7FFF)
+ sample = 0x7FFF;
+ quant_idx += IncrementTable[code];
+ if (quant_idx < 0)
+ quant_idx = 0;
+ else if (quant_idx > 48)
+ quant_idx = 48;
+ prev_sample = sample;
+ return (short)sample;
+ }
+
+ static readonly ushort[] QuantizeTable = {
+ 0x010, 0x011, 0x013, 0x015, 0x017, 0x019, 0x01C, 0x01F, 0x022, 0x025, 0x029, 0x02D, 0x032, 0x037,
+ 0x03C, 0x042, 0x049, 0x050, 0x058, 0x061, 0x06B, 0x076, 0x082, 0x08F, 0x09D, 0x0AD, 0x0BE, 0x0D1,
+ 0x0E6, 0x0FD, 0x117, 0x133, 0x151, 0x173, 0x198, 0x1C1, 0x1EE, 0x220, 0x256, 0x292, 0x2D4, 0x31C,
+ 0x36C, 0x3C3, 0x424, 0x48E, 0x502, 0x583, 0x610
+ };
+ static readonly sbyte[] ScaleTable = { 1, 3, 5, 7, 9, 11, 13, 15, -1, -3, -5, -7, -9, -11, -13, -15 };
+ static readonly sbyte[] IncrementTable = { -1, -1, -1, -1, 2, 4, 6, 8, -1, -1, -1, -1, 2, 4, 6, 8 };
+ }
+}
diff --git a/Legacy/Legacy.csproj b/Legacy/Legacy.csproj
index e187eb2d..df56d9d5 100644
--- a/Legacy/Legacy.csproj
+++ b/Legacy/Legacy.csproj
@@ -52,17 +52,24 @@
+
+
+
+
+
+
+