‘‘‘
Author:?????Ji-Sung?Kim
Project:????deepjazz
Purpose:????Generate?jazz?using?a?deep?learning?model?（LSTM?in?deepjazz）.

Some?code?adapted?from?Evan?Chow‘s?jazzml?https://github.com/evancchow/jazzml?
with?express?permission.

Code?was?built?while?significantly?referencing?public?examples?from?the
Keras?documentation?on?GitHub:
https://github.com/fchollet/keras/blob/master/examples/lstm_text_generation.py

GPU?run?command:
????THEANO_FLAGS=mode=FAST_RUNdevice=gpufloatX=float32?python?generator.py?[#?of?epochs]

????Note:?running?Keras/Theano?on?GPU?is?formally?supported?for?only?NVIDIA?cards?（CUDA?backend）.
‘‘‘
from?__future__?import?print_function
import?sys

from?music21?import?*
import?numpy?as?np

from?grammar?import?*
from?preprocess?import?*
from?qa?import?*
import?lstm

#----------------------------HELPER?FUNCTIONS----------------------------------#

‘‘‘?Helper?function?to?sample?an?index?from?a?probability?array?‘‘‘
def?__sample（a?temperature=1.0）:
????a?=?np.log（a）?/?temperature
????#?a?=?np.exp（a）?/?np.sum（np.exp（a））
????#?return?np.argmax（np.random.multinomial（1?a?1））
????dist?=?np.exp（a）/np.sum（np.exp（a））
????choices?=?range（len（a））
????return?np.random.choice（choices?p=dist）

‘‘‘?Helper?function?to?generate?a?predicted?value?from?a?given?matrix?‘‘‘
def?__predict（model?x?indices_val?diversity）:
????preds?=?model.predict（x?verbose=0）[0]
????next_index?=?__sample（preds?diversity）
????next_val?=?indices_val[next_index]

????return?next_val

‘‘‘?Helper?function?which?uses?the?given?model?to?generate?a?grammar?sequence?
????from?a?given?corpus?indices_val?（mapping）?abstract_grammars?（list）?
????and?diversity?floating?point?value.?‘‘‘
def?__generate_grammar（model?corpus?abstract_grammars?values?val_indices
???????????????????????indices_val?max_len?max_tries?diversity）:
????curr_grammar?=?‘‘
????#?np.random.randint?is?exclusive?to?high
????start_index?=?np.random.randint（0?len（corpus）?-?max_len）
????sentence?=?corpus[start_index:?start_index?+?max_len]????#?seed
????running_length?=?0.0
????while?running_length?<=?4.1:????#?arbitrary?from?avg?in?input?file
????????#?transform?sentence?（previous?sequence）?to?matrix
????????x?=?np.zeros（（1?max_len?len（values）））
????????for?t?val?in?enumerate（sentence）:
????????????if?（not?val?in?val_indices）:?print（val）
????????????x[0?t?val_indices[val]]?=?1.

????????next_val?=?__predict（model?x?indices_val?diversity）

????????#?fix?first?note:?must?not?have??and?not?be?a?rest
????????if?（running_length?????????????tries?=?0
????????????while?（next_val.split（‘‘）[0]?==?‘R‘?or?
????????????????len（next_val.split（‘‘））?!=?2）:
????????????????#?give?up?after?1000?tries;?random?from?input‘s?first?notes
????????????????if?tries?>=?max_tries:
????????????????????print（‘Gave?up?on?first?note?generation?after‘?max_tries?
????????????????????????‘tries‘）
????????????????????#?np.random?is?exclusive?to?high
????????????????????rand?=?np.random.randint（0?len（abstrac

?屬性????????????大小?????日期????時間???名稱
-----------?---------??----------?-----??----
?????目錄???????????0??2018-10-28?23:30??deepjazz\
?????文件?????????862??2017-08-02?09:43??deepjazz\.gitignore
?????文件???????11357??2017-08-02?09:43??deepjazz\LICENSE
?????文件?????????309??2017-08-02?09:43??deepjazz\NOTICE
?????文件????????2368??2017-08-02?09:43??deepjazz\README.md
?????目錄???????????0??2018-10-28?22:42??deepjazz\__pycache__\
?????文件????????7182??2018-10-28?22:42??deepjazz\__pycache__\grammar.cpython-36.pyc
?????文件????????1624??2018-10-28?22:11??deepjazz\__pycache__\lstm.cpython-36.pyc
?????文件????????3983??2018-10-28?22:30??deepjazz\__pycache__\preprocess.cpython-36.pyc
?????文件????????2131??2018-10-28?22:27??deepjazz\__pycache__\qa.cpython-36.pyc
?????文件????????6999??2018-10-28?23:30??deepjazz\generator.py
?????文件???????15244??2018-10-28?22:41??deepjazz\grammar.py
?????文件????????1815??2017-08-02?09:43??deepjazz\lstm.py
?????目錄???????????0??2018-10-28?23:47??deepjazz\midi\
?????文件????????4320??2018-10-28?23:33??deepjazz\midi\deepjazz_on_metheny...128_epochs.midi
?????文件???????92549??2017-08-02?09:43??deepjazz\midi\original_metheny.mid
?????文件????????5629??2018-10-28?22:30??deepjazz\preprocess.py
?????文件????????2861??2018-10-28?22:27??deepjazz\qa.py