Difference between revisions of "Audio Input and Output from USB Microphone + Raspberry Pi"
m (Naraharip moved page Audio Input from USB Microphone + Raspberry Pi to Audio Input and Output from USB Microphone + Raspberry Pi) |
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− | ''' | + | '''Overview''' <br/> |
− | + | This tutorial will describe how to input audio to a Raspberry Pi using a USB microphone and furthermore how to output that audio simultaneously if needed. | |
+ | <br/> | ||
+ | '''Materials and Prerequisites'''<br/> | ||
+ | *USB Microphone | ||
+ | *Raspberry Pi | ||
+ | '''Process''' | ||
+ | <br/> | ||
+ | Install the following libraries: | ||
+ | <br/> | ||
+ | PyAudio: Used to play and record audio on a variety of platforms. Install it by typing | ||
+ | <font face="Courier"><code>pip install pyaudio</code></font> into the terminal | ||
+ | <br/> | ||
+ | Numpy: fundamental package for scientific computing in Python. Install it by typing | ||
+ | <font face="Courier"><code>pip install numpy</code></font> into the terminal | ||
+ | <br/> | ||
− | |||
− | + | Copy the following Python script to read audio input to wave files: | |
− | + | <br/> | |
− | + | Copy the following Python script for simultaneously streaming audio output with input: | |
− | |||
− | |||
− | |||
− | |||
− | |||
− | |||
− | |||
− | |||
− | |||
− | |||
− | Copy the | ||
<source lang="python"> | <source lang="python"> | ||
import pyaudio | import pyaudio | ||
− | |||
import numpy as np | import numpy as np | ||
− | + | chunk=4096 | |
− | + | RATE=44100 | |
− | + | ||
− | + | p=pyaudio.PyAudio() | |
− | |||
− | + | #input stream setup | |
− | + | stream=p.open(format = pyaudio.paInt16,rate=RATE,channels=1, input_device_index = 2, input=True, frames_per_buffer=chunk) | |
− | |||
− | |||
− | stream = p.open( | ||
− | |||
− | |||
− | |||
− | |||
− | |||
− | |||
− | ) | ||
− | + | #output stream setup | |
− | + | player=p.open(format = pyaudio.paInt16,rate=RATE,channels=1, output=True, frames_per_buffer=chunk) | |
− | |||
− | |||
+ | while True: #Used to continuously stream audio | ||
+ | data=np.fromstring(stream.read(chunk,exception_on_overflow = False),dtype=np.int16) | ||
+ | player.write(data,chunk) | ||
+ | |||
+ | #closes streams | ||
+ | stream.stop_stream() | ||
+ | stream.close() | ||
+ | p.terminate | ||
</source> | </source> | ||
− | |||
− | + | '''Authors''' <br/> | |
− | [ | + | Pavan Narahari - Fall 2018 <br/> |
+ | Sam Manyak - Fall 2018 | ||
+ | <br/> | ||
+ | '''Group Link'''<br/> | ||
+ | '''References'''<br/> | ||
+ | The basis of the code was derived from the code developed by markjay4k, an engineer working with audio spectrum analyzers. You can find a link to his github at: https://github.com/markjay4k/Audio-Spectrum-Analyzer-in-Python | ||
+ | <br/> | ||
+ | Here is the documentation for the PyAudio Library: [https://people.csail.mit.edu/hubert/pyaudio/docs/ PyAudio] | ||
+ | |||
− | |||
[[Category:HowTos]] | [[Category:HowTos]] | ||
[[Category:Programming]] | [[Category:Programming]] | ||
[[Category:Raspberry_Pi]] | [[Category:Raspberry_Pi]] |
Revision as of 18:33, 7 December 2018
Overview
This tutorial will describe how to input audio to a Raspberry Pi using a USB microphone and furthermore how to output that audio simultaneously if needed.
Materials and Prerequisites
- USB Microphone
- Raspberry Pi
Process
Install the following libraries:
PyAudio: Used to play and record audio on a variety of platforms. Install it by typing
pip install pyaudio
into the terminal
Numpy: fundamental package for scientific computing in Python. Install it by typing
pip install numpy
into the terminal
Copy the following Python script to read audio input to wave files:
Copy the following Python script for simultaneously streaming audio output with input:
import pyaudio
import numpy as np
chunk=4096
RATE=44100
p=pyaudio.PyAudio()
#input stream setup
stream=p.open(format = pyaudio.paInt16,rate=RATE,channels=1, input_device_index = 2, input=True, frames_per_buffer=chunk)
#output stream setup
player=p.open(format = pyaudio.paInt16,rate=RATE,channels=1, output=True, frames_per_buffer=chunk)
while True: #Used to continuously stream audio
data=np.fromstring(stream.read(chunk,exception_on_overflow = False),dtype=np.int16)
player.write(data,chunk)
#closes streams
stream.stop_stream()
stream.close()
p.terminate
Authors
Pavan Narahari - Fall 2018
Sam Manyak - Fall 2018
Group Link
References
The basis of the code was derived from the code developed by markjay4k, an engineer working with audio spectrum analyzers. You can find a link to his github at: https://github.com/markjay4k/Audio-Spectrum-Analyzer-in-Python
Here is the documentation for the PyAudio Library: PyAudio