在pyaudio/wave中录制和播放字节列表

Question

我想用pyaudio和wave库来录音和播放我的声音，但我不知道该怎么做，因为wave库需要一个文件路径。即使我试着把它设置成一个包含几秒钟前录音的字节列表的变量，还是不行，因为我不能对列表使用'read'。有没有人有什么想法？我想做一个像KORG那样的循环播放器。

我希望在停止录音后立即播放，就像真正的循环播放器一样，而不需要把录音保存为文件。

这是我的代码（Python 3.4）：

def record(self): #recording a voice

    #var for bytes from recording
    self.stream = self.player.open(format = self.FORMAT,
            channels = self.CHANNELS,
            rate = self.RATE,
            input = True,
            frames_per_buffer = self.CHUNK)

    print("Recording")

    self.frames = [] #byte list

    #recoring for a few seconds (5sec at this moment)
    for i in range(0, int(self.RATE / self.CHUNK * self.RECORD_SECONDS)):
        self.data = self.stream.read(self.CHUNK) #sing stream do data var
        self.frames.append(self.data) #add bytes to the end of a list
    print("Stop recording")

    self.stopRecording()

def stopRecording(self):

    self.stream.stop_stream()
    self.stream.close()
    print("Recording has been stopped")

    self.play()

def play(self): #playing a record
    print("Playing")


    f = wave.open(self.frames,"rb")  
    #read data  
    data = f.readframes(CHUNK)  

    #play stream  
    while data != '':  
        self.stream.write(data)  
        data = f.readframes(CHUNK)  

    self.stopPlaying()

Answer 1

在你停止录制之后，需要把你收集到的数据合并起来，可以用 data = ''.join(self.frames) 这行代码。最后，你需要建立一个循环（可以是 for 循环或 while 循环），来逐个发送你的字节列表。下面是我怎么做的：

import pyaudio

chunk = 1024
FORMAT = pyaudio.paInt16
CHANNELS = 1
RATE = 41000
RECORD_SECONDS = 5


p = pyaudio.PyAudio()

stream = p.open(format = FORMAT,
    channels = CHANNELS,
    rate = RATE,
    input = True,
    output = True,
    frames_per_buffer = chunk)



print ("***Recording***")

all = [] 

for i in range(0, RATE / chunk * RECORD_SECONDS):
     data = stream.read(chunk)
     all.append(data) 


print("***Stop recording***")


print ("***START PLAY***")


data = ''.join(all)


for i in range(0, len(data), chunk):
    stream.write(data[i:i+chunk])