This script allows to convert data stored in SNG files into MID files. It supposed to be executed from Synalaze It hex-editor and requires SNG grammar to be loaded first.

sng2midi.py

import midi
import time;

#---Class Song---
class Song:
	def __init__(self):
  	print "Song started"
		self.track = ''
		self.pattern = midi.Pattern()	

	def processSong(self, result):	
		resultType = result.getType()

		if resultType == RESULT_STRUCTURE_START_TYPE:
			structureName = result.getName()

			#Start of track data chunk
			if structureName == "Track Events":
				self.track = ''
				self.track = Track(self.pattern)

		if hasattr(self.track, 'processTrack'):
			self.track.processTrack(result)

	def __del__(self):
		self.track = ''
		midi.write_midifile("/Users/bkotov/Temp/test_" + str(time.time()) + ".mid" , self.pattern)
		print "Song ended"
		
#---Class Song---


#---Class Track---
class Track:
	def __init__(self, pattern):
		print "Track started"
		self.pattern = pattern
		self.midiEvents = []
		self.lastEvent = []

	def processTrack(self, result):
		if result.getName() == 'NoteOn':
			self.lastEvent = []
			self.lastEvent.append('note')

		# Append note to events list.
		if len(self.lastEvent) and result.getName() in ['note', 'velocity', 'length', 'timeShift']:
			value = self.numberFromValue(result.getValue())

			self.lastEvent.append(value)
			if result.getName() == 'timeShift':
				self.midiEvents.append(self.lastEvent)
				self.lastEvent = []

	def numberFromValue(self, value):
		if( value != None ):
			type = value.getType()
			
			if type == VALUE_NUMBER_UNSIGNED:
				return value.getUnsigned()
			elif type == VALUE_NUMBER_SIGNED:
				return value.getSigned()
			elif type == VALUE_NUMBER_FLOAT:
				return value.getFloat()

	def appendEvents(self, track):
		for event in self.midiEvents:
			if event[0] == 'note' and event[3] < 32767 and event[4] < 32767:
				on = midi.NoteOnEvent(tick=10, velocity=event[2], pitch=event[1])
				track.append(on)
				off = midi.NoteOffEvent(tick=event[3], pitch=event[1])
				track.append(off)
		eot = midi.EndOfTrackEvent(tick=1)
		track.append(eot)

	def __del__(self):
		print "Track ended"

		if len(self.midiEvents) > 0:
			track = midi.Track()
			self.pattern.append(track)
			self.appendEvents(track)
			
#---Class Track---

def init():
	print "Init"

song = ''

def processResult(result):
	global song

  resultType = result.getType()

	if resultType == RESULT_STRUCTURE_START_TYPE:
		structureName = result.getName()

		# Start of song data chunk
		if structureName == "MTK1 Chunk":
			song = ''
			song = Song()

		# End of the song data chunk
		if structureName == 'TMA1 Chunk':
			song = ''

	if hasattr(song, 'processSong'):
		song.processSong(result)

def terminate():
	global song
	del(song)
	print "terminate"

Do you have the SNG grammar file? I can't find it anywhere.