Can I record my own voice using pyaudio without a mic?

Question

So i'm triying to make a exercise here that I have to record my voice using pyaudio. I don't know if need a mic or if the code is wrong, but this keeps happenig when run the program:

ALSA lib pcm.c:2642:(snd_pcm_open_noupdate) Unknown PCM cards.pcm.rear
ALSA lib pcm.c:2642:(snd_pcm_open_noupdate) Unknown PCM cards.pcm.center_lfe
ALSA lib pcm.c:2642:(snd_pcm_open_noupdate) Unknown PCM cards.pcm.side
ALSA lib pcm_route.c:869:(find_matching_chmap) Found no matching channel map
ALSA lib pcm_route.c:869:(find_matching_chmap) Found no matching channel map
ALSA lib pcm_route.c:869:(find_matching_chmap) Found no matching channel map
ALSA lib pcm_route.c:869:(find_matching_chmap) Found no matching channel map
Cannot connect to server socket err = No such file or directory
Cannot connect to server request channel
jack server is not running or cannot be started
JackShmReadWritePtr::~JackShmReadWritePtr - Init not done for -1, skipping unlock
JackShmReadWritePtr::~JackShmReadWritePtr - Init not done for -1, skipping unlock
Cannot connect to server socket err = No such file or directory
Cannot connect to server request channel
jack server is not running or cannot be started
JackShmReadWritePtr::~JackShmReadWritePtr - Init not done for -1, skipping unlock
JackShmReadWritePtr::~JackShmReadWritePtr - Init not done for -1, skipping unlock
ALSA lib pcm_oss.c:377:(_snd_pcm_oss_open) Unknown field port
ALSA lib pcm_oss.c:377:(_snd_pcm_oss_open) Unknown field port
ALSA lib pcm_usb_stream.c:486:(_snd_pcm_usb_stream_open) Invalid type for card
ALSA lib pcm_usb_stream.c:486:(_snd_pcm_usb_stream_open) Invalid type for card
Cannot connect to server socket err = No such file or directory
Cannot connect to server request channel
jack server is not running or cannot be started
JackShmReadWritePtr::~JackShmReadWritePtr - Init not done for -1, skipping unlock
JackShmReadWritePtr::~JackShmReadWritePtr - Init not done for -1, skipping unlock
Start recording
Traceback (most recent call last):
  File "/home/sindri-21/Desktop/Python/teste_audio.py", line 32, in <module>
    obj.setchannels(CHANNELS)
AttributeError: 'Wave_write' object has no attribute 'setchannels'
Exception ignored in: <function Wave_write.__del__ at 0x7faf94040dc0>
Traceback (most recent call last):
  File "/usr/lib/python3.8/wave.py", line 327, in __del__
  File "/usr/lib/python3.8/wave.py", line 445, in close
  File "/usr/lib/python3.8/wave.py", line 463, in _ensure_header_written
wave.Error: # channels not specified

Anyway, this is the code:

import pyaudio
import wave

FRAMES_PER_BUFFER = 32000
FORMAT = pyaudio.paInt16
CHANNELS = 2
RATE = 16000

p = pyaudio.PyAudio()

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

print("Start recording")

seconds = 5
frames = []
for i in range(0, int(RATE/FRAMES_PER_BUFFER*seconds)):
    data = stream.read(FRAMES_PER_BUFFER)
    frames.append(data)

stream.stop_stream()
stream.close()
p.terminate()

obj = wave.open("output.wav", "wb")
obj.setchannels(CHANNELS)
obj.setsampwidth(p.get_sample_size(FORMAT))
obj.setframerate(RATE)
obj.writeframes(b"".join(frames))
obj.close()

I just want to know why it doesn't works, maybe the channels, maybe is version of pyaudio (0.2.11), the lack of a mic, etc...

How is the sound supposed to get into your computer without a microphone? — mkrieger1, Jul 19 '22 at 07:50

score 1 · Answer 1 · answered Jul 19 '22 at 08:17

In order to capture any sound, your computer needs some hardware to convert acoustic waves to digital signals, commonly a microphone. So you will need to either work on a computer with a built in microphone (most laptops), or purchase an external microphone. No software can capture sound without appropriate hardware.

Can I record my own voice using pyaudio without a mic?

1 Answers1