diff --git a/.gitignore b/.gitignore
index 9104364..27af1b5 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,4 +1,5 @@
 JAK1/
 JAK2/
 JAK3/
-OUT/
\ No newline at end of file
+OUT/
+*.mid
\ No newline at end of file
diff --git a/musparser.py b/musparser.py
index 66c5021..aa7c36b 100644
--- a/musparser.py
+++ b/musparser.py
@@ -8,6 +8,55 @@ import struct
 #yes two midi libraries...
 import music21
 import mido
+from collections import namedtuple
+
+
+#named tuple definitions
+
+#struct type            I       I          I            I         I              I             I                 I
+MUS = namedtuple('MUS','version subversion minorversion something soundBankStart soundBankSize sequenceDataStart s3')
+MUSStructString= "8I"
+
+#struct type               4s        I       I        4s   I H H    H     H       I I                I            I I             I I 12s     H H H H I
+SBV2 = namedtuple('SBV2', 'signature version hversion name a b nMap nSMap nSample f instrumentOffset regionOffset i soundBankSize k l extname m n o p q')
+SBV2StructString = "4s2I4sI4H7I12s4HI"
+
+#struct type                          B           B      H    I
+Instrument = namedtuple('Instrument','regionCount volume zero regionOffset')
+InstrumentStructString = "2BHI"
+
+'''
+    struct Region { // 0x18 B
+        uint8_t type; //? always 0
+        uint8_t marker1; // usually 7f, not always, maybe another volume?
+        uint8_t a; // not same for same sample data
+        uint8_t b; // not same for same sample data
+        int16_t c; // signed in range +/- 64? Tuning? intruments with 2 regions seem to have these in a plus minus couple, maybe panorama?
+        uint32_t keymap; //? LSB is only set for programs with multiple entries?
+        uint16_t marker2; // 0x80ff, bt sometimes LSB is dX
+        uint8_t type2; // in range c9 - d1? can be different for same sample data
+        uint8_t marker3; // always 9f, or 0x80 | 0x1f?
+        uint16_t version; //? 1 or 0, maybe looped flag? not same sample data
+        uint32_t oSample; // offset to sample from start of sample bank
+        uint32_t sampleID; // I think it's the index in the sample bank...
+    }
+
+'''
+#struct type                  B    B       B B h   B B       H    B B B B H        I            I
+Region = namedtuple('Region','type volume1 a b pan c volume2 zero d e f g loopFlag sampleOffset sampleId')
+RegionStructString = "=BBBBhBBHBBBBHII"
+
+#struct type            I       I          I            I
+SEQ = namedtuple('SEQ','version subversion minorversion sequenceDataSize')
+SEQStructString = "4I"
+
+#struct type            4s        H H I I 4s   I I              I I         I        H    B          B
+MID = namedtuple('MID','signature a b c d name e midiDataOffset g midiTempo division zero trackIndex trackCount')
+MIDStructString = "4s2H2I4s5IH2B"
+
+#struct type              4s        H    B B          4s   I
+MMID = namedtuple('MMID','signature type a trackCount name zero')
+MMIDStructString = "4sH2B4sI"
 
 def is_valid_file(parser, arg):
     if not os.path.exists(arg):
@@ -32,126 +81,57 @@ sounds_length = 20
 
 with open(args.filepath, "rb") as f:
 
-    '''
-        struct MUS { // 2 * 16
-            uint32_t version; // 1 version?
-            uint32_t subversion; // 3 subversion?
-            uint32_t minorversion; // 32 minor version?
-            uint32_t oSomething; // points to start of soundbank data, -32? or is it SBv2 struct data size?
-            uint32_t oBank; // this points to the start of the soundbank sample data
-            uint32_t sBank; // size of sound bank
-            uint32_t oMID; // pointer to sequenced music data
-            uint32_t s3;
-        }
-
-        E.g.: Version 1.3.32, oSomething 704, Bank offset 736 B, Bank Size 534256 B, MID offset 534992, ? 22772
-    '''
-    MUSinfo = struct.unpack("IIIIIIII",f.read(32))
-    soundbankStart = MUSinfo[4]
-    print(f"SoundBank Start: {soundbankStart}")
-    sequenceStart = MUSinfo[6]
-    print(f"Sequence Start: {sequenceStart}")
+    
+    MUSInfo = MUS._make(struct.unpack(MUSStructString,f.read(32)))
+    
+    print(f"SoundBank Start: {MUSInfo.soundBankStart}")
+    print(f"Sequence Start: {MUSInfo.sequenceDataStart}")
 
 
     sbv2Start = f.tell()
 
-    '''
-        struct SBv2 { // 5x16 B
-            char signature[4]; // "SBv2"
-            uint32_t version;
-            uint32_t hversion;
-            char name[4]; //eg "V1RA" or "BOSS"
-            uint32_t a; // 0xa
-            uint16_t b; //1
-            uint16_t nMap;
-            uint16_t nSMap;
-            uint16_t nSample; // same as nMap? no it can be different...
-            uint32_t f; //0x34 another offset, to end of extname from start of SBv2?
-            uint32_t oInstrument; // from start of SBv2
-            uint32_t oRegions; // from start of SBv2
-            uint32_t i; //0x5040
-            uint32_t sizeofsamples; // same as in file header
-            uint32_t k; //0
-            uint32_t l; //4 or 5?
-            char extname[12]; // e.g. "V1RAV1RAV1RA"
-            uint16_t m;
-            uint16_t n;
-            uint16_t o;
-            uint16_t p;
-            uint32_t q;
-        }
-    '''
-    sbv2 = struct.unpack("4sII4sIHHHHIIIIIII12sHHHHI",f.read(80))
+    sbv2Info = SBV2._make(struct.unpack(SBV2StructString,f.read(80)))
     
-    instrumentStart = sbv2[10] + sbv2Start
-    regionStart = sbv2[11] + sbv2Start
+    instrumentStart = sbv2Info.instrumentOffset + sbv2Start
+    regionStart = sbv2Info.regionOffset + sbv2Start
     
-    print(MUSinfo)
-    print(sbv2)
+    print(MUSInfo)
+    print(sbv2Info)
     f.seek(instrumentStart)
     instruments = []
+
+    
     while(f.tell() < regionStart):
-        '''
-            struct Instrument {
-                uint8_t nRegion; // usually 1
-                uint8_t volume; // ? maybe... like 7f is 1.0?
-                uint16_t something; // always 0
-                uint32_t oRegion; // relative to start of SBv2 block I think, points to the first region for instrument
-            }
-        '''
-        instrument = struct.unpack("BBHI",f.read(8))
+        instrument = Instrument._make(struct.unpack(InstrumentStructString,f.read(8)))
         instruments.append(instrument)
 
     print("INSTRUMENTS")
     for instrument in instruments:
         print(instrument)
 
-    '''
-        struct Region { // 0x18 B
-            uint8_t type; //? always 0
-            uint8_t marker1; // usually 7f, not always, maybe another volume?
-            uint8_t a; // not same for same sample data
-            uint8_t b; // not same for same sample data
-            int16_t c; // signed in range +/- 64? Tuning? intruments with 2 regions seem to have these in a plus minus couple, maybe panorama?
-            uint32_t keymap; //? LSB is only set for programs with multiple entries?
-            uint16_t marker2; // 0x80ff, bt sometimes LSB is dX
-            uint8_t type2; // in range c9 - d1? can be different for same sample data
-            uint8_t marker3; // always 9f, or 0x80 | 0x1f?
-            uint16_t version; //? 1 or 0, maybe looped flag? not same sample data
-            uint32_t oSample; // offset to sample from start of sample bank
-            uint32_t sampleID; // I think it's the index in the sample bank...
-        }
-
-    '''
+    
     regions = []
-    while(f.tell()<soundbankStart):
-        region = struct.unpack("=BBBBhIHBBHII", f.read(24))
-        regions.append(region)
+    while(f.tell()<MUSInfo.soundBankStart):
+        regionInstance = Region._make(struct.unpack(RegionStructString, f.read(24)))
+        regions.append(regionInstance)
+
     print("REGIONS")
     sampleOffsets = []
     for region in regions:
         print(region)
-        sampleIndex = region[11]
-        sampleOffset = soundbankStart + region[10]
+        sampleIndex = region.sampleId
+        sampleOffset = MUSInfo.soundBankStart + region.sampleOffset
         if sampleOffset not in sampleOffsets:
             sampleOffsets.append(sampleOffset)
-        #print(f"Region Sample Audio  offset: {soundbankStart + region[10]}")
+        #print(f"Region Sample Audio  offset: {MUSInfo.soundBankStart + region[10]}")
     # this should align the index of the sample offset with it's sample ID
     sampleOffsets.sort()
     # the sample data lies between here and the next processed section 22050 Hz sample rate mono adpcm
 
-    '''
-        struct seq {
-            u32 version; // 2
-            u32 subversion; // 1
-            u32 number; // 16
-            u32 size; // Size of sequence data following this struct
-        }
+    
+    f.seek(MUSInfo.sequenceDataStart)
 
-    '''
-    f.seek(sequenceStart)
-
-    seq = struct.unpack("4I",f.read(16))
+    seqInstance = SEQ._make(struct.unpack(SEQStructString,f.read(16)))
     
     
     midBlockType = f.read(4)
@@ -163,72 +143,27 @@ with open(args.filepath, "rb") as f:
     midBlockDataOffsets = []
 
     if(midBlockType == str.encode("MID ")):
-        '''
-            struct MID {
-                char signature[4]; // "MID "
-                u16 a;
-                u16 b;
-                u32 c;
-                u32 d;
-                char name[4]; // e.g. "V1RA"
-                u32 e;
-                u32 f; // offset from start of struct to midi data
-                u32 g;
-                u32 tempo; // microseconds per quarter note?
-                u32 division; // or not...
-                u16 unknown;
-                u8 iTrack; // track index 0 - 2
-                u8 nTrack; // number of tracks (3)
-            }
-        '''
-        midBlock = struct.unpack("4sHHII4sIIIIIHBB", f.read(44))
+        
+        midBlock = MID._make(struct.unpack(MIDStructString, f.read(44)))
         midBlocks.append(midBlock)
-        midBlockDataOffsets.append(int(midBlock[7] + mmidBlockStart))
+        midBlockDataOffsets.append(int(midBlock.midiDataOffset + mmidBlockStart))
         midBlockOffsets.append(mmidBlockStart)
         print(midBlock)
     elif midBlockType == str.encode("MMID"):
-        '''
-            struct MMID {
-                char signature[4]; // "MMID"
-                u16 type; //?
-                u8 a; //?
-                u8 nTrack; // maybe... it's always 3 lol
-                char name[4]; // e.g. "V1RA"
-                u32 blank; //?
-            }
-        '''
-        
-        mmidBlock = struct.unpack("4sHBB4sI", f.read(16))
+        mmidBlock = MMID._make(struct.unpack(MMIDStructString, f.read(16)))
         print("MMIDBLOCK")
         print(mmidBlock)
-        for i in range(mmidBlock[3]):
+        for i in range(mmidBlock.trackCount):
             blockOffset = struct.unpack("I",f.read(4))[0] + mmidBlockStart
             midBlockOffsets.append(blockOffset)
 
         for offset in midBlockOffsets:
             f.seek(offset)
-            '''
-                struct MID {
-                    char signature[4]; // "MID "
-                    u16 a;
-                    u16 b;
-                    u32 c;
-                    u32 d;
-                    char name[4]; // e.g. "V1RA"
-                    u32 e;
-                    u32 oMIDI; // offset from start of struct to midi data
-                    u32 g;
-                    u32 tempo; // microseconds per quarter note?
-                    u32 division; // or not...
-                    u16 unknown;
-                    u8 iTrack; // track index 0 - 2
-                    u8 nTrack; // number of tracks (3)
-                }
-            '''
-            midBlock = struct.unpack("4sHHII4sIIIIIHBB", f.read(44))
+            
+            midBlock = MID._make(struct.unpack(MIDStructString, f.read(44)))
             midBlocks.append(midBlock)
         for i in range(len(midBlockOffsets)):
-            midBlockDataOffsets.append(int(midBlocks[i][7] + midBlockOffsets[i]))
+            midBlockDataOffsets.append(int(midBlocks[i].midiDataOffset + midBlockOffsets[i]))
 
     print("MIDBLOCKS")
     for block in midBlocks:
@@ -261,10 +196,10 @@ with open(args.filepath, "rb") as f:
     
     trackEvents = []
     for block in midBlocks: 
-        mt = music21.midi.MidiTrack(block[12])
-        midiData = midBlockData[block[12]]
+        mt = music21.midi.MidiTrack(block.trackIndex)
+        midiData = midBlockData[block.trackIndex]
         mt.read(midiData)
-        cleanTrack = music21.midi.MidiTrack(block[12])
+        cleanTrack = music21.midi.MidiTrack(block.trackIndex)
 
         for event in mt.events:
             if(event.type in eventsToOutput or event.isDeltaTime()):
@@ -274,7 +209,7 @@ with open(args.filepath, "rb") as f:
         track = mido.MidiTrack()
         mid.tracks.append(track)
 
-        track.append(mido.MetaMessage('set_tempo',tempo=block[9]))
+        track.append(mido.MetaMessage('set_tempo',tempo=block.midiTempo))
 
         delayTime = 0
         for event in trackEvents:
@@ -301,4 +236,4 @@ with open(args.filepath, "rb") as f:
                     delayTime = 0
                 track.append(messageToAdd)
     
-    mid.save(f"{sbv2[3].decode('utf-8')}.mid")
+    mid.save(f"{sbv2Info.name.decode('utf-8')}.mid")