flothesof / pyqtgraph-spectrographer

A pyqtgraph based spectrogram app using pyaudio.

pyqtgraph-spectrographer

This is a simple app to display a live spectrogram from microphone input (including waveform and frequency domain).

Installation

conda

Assuming you have git cloned the repo and have a command prompt in the cloned directory, you can use conda to create an environment with all necessary dependencies:

>>> conda env create -f environment.yml

Note: I have developed this on MacOS and found out that using pyaudio (bindings for PortAudio) required additional steps such as installing PortAudio using brew. YMMV.

virtualenv + pip

You can also install dependencies for this project in a virtualenv using pip:

>>> python3 -m venv venv
>>> source venv/bin/activate
>>> python3 -m pip install -r requirements.txt

Note that on Ubuntu you might need to install the following packages beforehand: apt-get install python3-venv libasound-dev portaudio19-dev libportaudio2 libportaudiocpp0 python3-pyqtgraph.

Usage

From the root directory, activate the conda environment with the dependencies and run main.py

>>> conda activate spectrographer
>>> python main.py

pyqtgraph-spectrographer's Issues

What changes are needed for 32Bit Audio?

I verified that this program works great on a Jetson Nano with a USB Microphone that has 16bit depth. But, I'm having issues getting it to work with an I2S MEMS Microphone (SPH0645LM4H) that has a bit depth of 24bits (where you use 32bits transfers).

I successfully tested recording wave files with pyaudio with this microphone as long as I use pyaudio.paInt32 as the sample format. But, I can't figure out everything I need to change to get it work with the pyqtgraph-spectrographer.

I tried changing lines 21, and 33 of the microphone.py file, but then I didn't get anything on the waveform or FFT plot.

Incorrect axis ticks/scale in spectrogram's frequency scale (correct value / 2)

I realized that the frequency scale in the spectrogram view is off by a factor of 0.5.

Great work on the pyqtgraph based spectrogram! I love it!

pyqtgraph api changes

There have been some changes to pyqtgraph - I think I've managed to fix most of the differences in the attached code
main.zip

Test with

Package             Version
------------------- -----------
contourpy           1.1.1
cycler              0.12.1
fonttools           4.51.0
importlib_resources 6.4.0
kiwisolver          1.4.5
matplotlib          3.7.5
numpy               1.24.4
packaging           24.0
pillow              10.3.0
pip                 24.0
PyAudio             0.2.14
pyparsing           3.1.2
PyQt5               5.15.10
PyQt5-Qt5           5.15.2
PyQt5-sip           12.13.0
pyqtgraph           0.13.3
python-dateutil     2.9.0.post0
setuptools          41.2.0
six                 1.16.0
zipp                3.18.1