Added feature - Command Line Interpreter for interactive music compos…

…ition with PySynth.

menv.py

@@ -0,0 +1,107 @@
+import pysynth
+from pyaudio import pyaudio
+import wave
+import sys
+import os
+import string
+
+helpContent = "PySynth musical note interpreter.\nUsage: <Duration><Note> <Duration2><Note2> .... <DurationN><NoteN>\nOptional arguments:\n\t--bpm=Beats per minute [Default:120]\n\t--repeat=Number of bars [Default:1]\nSample: 1d 2c 4f --bpm=150 --repeat=2\nCommands: 'exit' and 'help'"
+usageHelp = "Notes are 'a' through 'g' of course,\noptionally with '#' or 'b' appended for sharps or flats.\nFinally the octave number (defaults to octave 4 if not given).\nAn asterisk at the end makes the note a little louder (useful for the beat).\n'r' is a rest.\n\nNote value is a number:\n1=Whole Note; 2=Half Note; 4=Quarter Note, etc.\nDotted notes can be written in two ways:\n1.33 = -2 = dotted half\n2.66 = -4 = dotted quarter\n5.33 = -8 = dotted eighth"
+
+class mEnv:
+	cliInput = ''
+	synthParam = []
+	bpmVal = 0
+	repeatVal = 0
+	inputEntered = False
+	def __init__(self):
+		cliInput = raw_input(">>> ")
+
+		self.parse(cliInput)
+
+		try:
+			if self.bpmVal and self.repeatVal:
+				pysynth.make_wav(self.synthParam, fn = 'temp.wav', silent = True, bpm = self.bpmVal, repeat = self.repeatVal)
+			elif self.bpmVal:
+				pysynth.make_wav(self.synthParam, fn = 'temp.wav', silent = True, bpm = self.bpmVal)
+			elif self.repeatVal:
+				pysynth.make_wav(self.synthParam, fn = 'temp.wav', silent = True, repeat = self.repeatVal)
+			else:
+				pysynth.make_wav(self.synthParam, fn = 'temp.wav', silent = True)
+		except KeyError:
+			print "Improper Syntax - Type 'help' to see usage."
+			mEnv()
+
+	def parse(self, cliInput):
+		if cliInput == 'exit':
+			sys.exit()
+		if cliInput == 'help':
+			print '\n' + helpContent + '\n-------------------------------------------\n' + usageHelp + '\n'
+			mEnv()
+
+		cliInput = cliInput.split()
+		self.synthParam = []
+		for comp in cliInput:
+			if comp.startswith('--'):
+				comp = comp.strip('-')
+				comp = comp.split('=')
+				if comp[0] == 'bpm':
+					try:
+						self.bpmVal = int(comp[1])
+					except IndexError:
+						print "Improper Syntax - Type 'help' to see usage."
+						mEnv()
+				if comp[0] == 'repeat':
+					try:
+						self.repeatVal = int(comp[1]) - 1
+					except IndexError:
+						print "Improper Syntax - Type 'help' to see usage."
+						mEnv()
+				continue
+
+			i = 0
+			for alphanum in comp:
+				if alphanum.isalpha():
+					try:
+						self.synthParam.append((comp[i:], int(comp[:i])))
+					except ValueError:
+						print "Non-existential Command."
+						mEnv()
+
+					break
+				i += 1
+
+	def play(self):
+		chunk = 1024
+		wf = wave.open('temp.wav', 'rb')
+		p = pyaudio.PyAudio()
+
+		# open stream
+		stream = p.open(format =
+	         		p.get_format_from_width(wf.getsampwidth()),
+        		        channels = wf.getnchannels(),
+		                rate = wf.getframerate(),
+		                output = True)
+
+		# read data
+		data = wf.readframes(chunk)
+
+		# play stream
+		while data != '':
+		    stream.write(data)
+		    data = wf.readframes(chunk)
+
+		stream.stop_stream()
+		stream.close()
+
+		p.terminate()
+
+	def removeFile(self):
+		os.remove('temp.wav')
+
+if __name__ == "__main__":
+	print helpContent
+	while True:
+		a = mEnv()
+		a.play()
+		a.removeFile()

pysynth.py

@@ -135,7 +135,7 @@
 
 import wave, math, struct
 
-def make_wav(song,bpm=120,transpose=0,pause=.05,boost=1.1,repeat=0,fn="out.wav"):
+def make_wav(song,bpm=120,transpose=0,pause=.05,boost=1.1,repeat=0,fn="out.wav", silent=False):
 	f=wave.open(fn,'w')
 
 	f.setnchannels(1)
@@ -192,12 +192,13 @@ def render2(a,b,vol):
 	# Write to output file (in WAV format)
 	##########################################################################
 
-	print "Writing to file", fn
+	if silent == False:
+		print "Writing to file", fn
 	curpos = 0
 	ex_pos = 0.
 	for rp in range(repeat+1):
 		for nn, x in enumerate(song):
-		    if not nn % 4:
+		    if not nn % 4 and silent == False:
 		        print "[%u/%u]\t" % (nn+1,len(song))
 		    if x[0]!='r':
 		        if x[0][-1] == '*':