如何翻译一个numpy的阵列和弦音乐 [英] how to translate a numpy array to polyphonic music
问题描述
我想用一个数组来播放音乐/声音。输出音乐/声音必须和弦。
我试试这个。
从scipy.io.wavfile进口写
导入numpy的是NP持续时间= 0.24
功放= 1E4
率= 44100高清说明（频率，持续时间，安培，率）：
T = np.linspace（0，持续时间，持续时间*率）
数据= np.sin（2 * np.pi *频率* T）*放大器
返回data.astype（np.int16）＃两个字节的整数tone0 =注（0，持续时间，安培，率）#silence
TONE1 =注（261.63，持续时间，安培，率）＃4
tone2 =注（329.63，持续时间，安培，率）E4＃
tone3 =注（392.00，持续时间，安培，率）＃G4
SEQ1 = np.concatenate（（TONE1，tone0，tone0，tone0，TONE1），轴= 1）
SEQ2 = np.concatenate（（tone0，tone2，tone0，tone0，tone2），轴= 1）
SEQ3 = np.concatenate（（tone0，tone0，tone3，tone0，tone3），轴= 1）曲= np.dstack（（SEQ1，SEQ2 SEQ3））写（song.wav'，44100，歌）
我想打song.wav文件和听到音符C，E和G逐个然后一片寂静，然后C和弦（C，E，G音符在同一时间播放）。<后/ p>
我得到什么，而不是由写入功能的错误。并且确定因为写函数（据我所知它不容创建和弦WAV文件）。万一误差
回溯（最后最近一次调用）：
文件music2.py26行，上述＆lt;＆模块GT;
写（song.wav'，44100，歌）
文件/usr/lib/python2.7/dist-packages/scipy/io/wavfile.py，168线，在写
fid.write（struct.pack（'＆LT; ihHIIHH'，16，1，NOC，速度，sbytes，BA，位））
struct.error：'I'格式要求0℃=号＆LT; = 4294967295
1）你知道到支持复音写功能的方法吗？
2）我打开我的code的完整的备选方案。最重要的一点是要产生（或播放）和弦从numpy的阵列声音。我试图做这样的事情 http://img44.imageshack.us/img44/6182 /music.swf ，但更简单，没有GUI，没有互动，只是1和0阵列同样的想法是该行已指定和特定的声音/笔记，列code的时间这些笔记被演奏。
你得到的错误是由于写想只有1或2维数组。你是传递一个3维数组（ dstack 的输出3D）。
我不知道我让你通过和弦的意思，但如果你只是意味着你想拥有覆盖每个 - 其他不同的音调，那么所有你需要做的是叠加的波形：
歌曲= SEQ1 SEQ2 + + SEQ3＃假设seqs是相同的长度
在最后，你可能要被路过的一维数组。 2-D阵列是，如果你想写的立体声声音。
I want to use an array to play music/sounds. The output music/sounds needs to be polyphonic.
I try this.
from scipy.io.wavfile import write
import numpy as np
duration=0.24
amp=1E4
rate=44100
def note(freq, duration, amp, rate):
t = np.linspace(0, duration, duration * rate)
data = np.sin(2*np.pi*freq*t)*amp
return data.astype(np.int16) # two byte integers
tone0 = note(0, duration, amp, rate) #silence
tone1 = note(261.63, duration, amp, rate) # C4
tone2 = note(329.63, duration, amp, rate) # E4
tone3 = note(392.00, duration, amp, rate) # G4
seq1 = np.concatenate((tone1,tone0,tone0,tone0, tone1),axis=1)
seq2 = np.concatenate((tone0,tone2,tone0,tone0, tone2),axis=1)
seq3 = np.concatenate((tone0,tone0,tone3,tone0, tone3),axis=1)
song = np.dstack((seq1,seq2,seq3))
write('song.wav', 44100, song)
I would like to play the song.wav file and hear the notes C, E and G one after the other then a silence and then the C chord (C,E,G notes play at the same time).
What I get, instead is an error by the write function. And that ok because the write function (as far as I know it can´t create polyphonic wav files). Just in case the error is
Traceback (most recent call last):
File "music2.py", line 26, in <module>
write('song.wav', 44100, song)
File "/usr/lib/python2.7/dist-packages/scipy/io/wavfile.py", line 168, in write
fid.write(struct.pack('<ihHIIHH', 16, 1, noc, rate, sbytes, ba, bits))
struct.error: 'I' format requires 0 <= number <= 4294967295
1) Do you know an alternative to the write function that support polyphony? 2) I am open to a complete alternative of my code. The important point is to generate (or play) polyphonic sounds from a numpy array. I am trying to do something like this http://img44.imageshack.us/img44/6182/music.swf, but much more simpler, not GUI, not interactive, just the same idea of a 1 and 0 array were the row have assigned and specific sound/note and the columns code for the time those notes are played.
The error you're getting is due to write wanting only a 1- or 2-dimensional array. You are passing it a 3-dimensional array (the output of dstack is 3D).
I'm not sure I get what you mean by polyphonic, but if you simply mean that you want to have different tones overlaid on each-other then all you need to do is superimpose the waveforms:
song = seq1 + seq2 + seq3 # Assumes seqs are of same length
In the end you probably want to be passing a 1-D array. 2-D arrays are for if you want to write stereo sounds.
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