I want to do some real time sound processing and I heard about

Return a tuple consisting of the minimum and maximum values of all samples inthe sound fragment.
Photo provided by Flickr

Library suggestions for real time audio synthesis? : Python

This course explores techniques for writing correct and efficient embedded code. Topics include C/C++ idioms, data abstraction, elementary data structures and algorithms, environment modeling, concurrency, hard real time, and modular program reasoning.

There is a utility  that will perform real time streaming and audio capture for speech recognition.
Photo provided by Flickr

real-time harmonic synthesis with PyGame and Numeric in Python

The Twitter API is a powerful thing, very suitable for researching the public opinion, market analysis, quick access to news, and other use-cases your creativity can support. A common thing to do, after you've carefully collected your tweets, is to analyse the data, where sentiment analysis plays a crucial role in systematically extracting subjective information from text. Anyway, sentiment analysis a huge field to be addressed in a small portion of a blog post, so in this part we'll only do some basic data analysis regarding the location and hashtags used by people tweeting "python".

I'd say that Python with Numeric and psyco is an excellent languagefor many real-time purposes once the GIL is replaced by per-objectlocks.
Photo provided by Pexels

The rtlsdr RTL2832U chips use a phased locked loop based synthesizer to produce the local oscillator required by the quadrature mixer. The quadrature mixer produces a complex-baseband output where the signal spans from -bandwidth/2 to +bandwidth/2 and bandwidth is the analog bandwidth of the mixer output stages. (, general ref: by Richard Lyons) This is complex-sampled (I and Q) by the ADC. The Sigma-Delta ADC samples at some high rate but low precision. From this a 28.8 Msps stream at 8 bits is produced. That can be resampled inside the RTL2832U to present whatever sample rate is desired to the host PC. This resampled output can be up to 3.2 MS/s but 2.56 MS/s is the max recommended to avoid losing samples. The minimum resampled output is 0.5 MS/s. Check for caveats and details. The actual output is interleaved; so one byte I, then one byte Q with no header or metadata (timestamps). The samples themselves are unsigned and you subtract 127 from them to get their actual {-127,+127} value. You'll almost certainly notice a stable spike around DC. It's from either the 1/f noise of the electronics or if it's a Zero-IF tuner (E4000) the LO beating with itself in the mixer.

Sending audio data in real time while capturing it enhances the user experience drastically when integrating speech into your applications.
Photo provided by Flickr


[Addon] [Feedback wanted] Real time audio synthesis …

The next thing to do is instantiate an object of the class with our credentials passed as arguments, and we'll use the method to only collect tweets we're interested in. We'll create our filter with the argument which provides the filter keywords, in our case "python". Besides the argument, there are more possibilities to fine-tune your filter, listed in the , such as: collecting tweets from selected users, languages, locations etc. The paid versions of the Streaming API would provide much more filtering options.

Python is sooo slow for the real-time DSP ..

We've selected the because of its diverse features aligned with different Twitter APIs, its maturity - although there's no information when its first release was published, there's information that version 2.6.0 appeared around 5 years ago, and its support for streaming tweets. In our first example we'll use the to search tweets containing the string "learn python", and later on we'll show a more realistic example using Twitter's .

AudioLazy - Package for audio processing with Python ..

In this blog post we concentrate on the , show how the setting up of your credentials goes with Twitter, and compare a few Python wrappers based on the community engagement. Then we show a few examples of using the Twitter API for searching tweets, and creating a stream of realtime tweets on a particular subject. Finally, we'll explore the saved data.

A C++ Development Platform For Real Time Audio …

In this tutorial, you will be writing a Python program that downloads the list of 100 mathematicians and their XTools pages, selects data about their popularity, and finishes by telling us the all time top 5 most popular mathematicians! Lets get started.