Dancing QT is a combined music database and player application specially designed for dancing schools and equivalent applications. Key features are an easy-to-use interface, fast search capabilities, playlist management, exact pitching and crossfading.
Looking around the open source landscape for a while, I tried to find a music database and player that is suitable for use in a dancing school environment – without success. Most mixing applications tend to be too confusing for the intended audience, most players lack database searching capabilites and most song databases don’t know how to pitch 😦
Because of this, I decided to setup a new application – Dancing QT. It uses alsaplayer because of its excellent interface and pitching capabilities, it uses an embedded SQLite DBMS to maintain a song database, and it uses taglib to populate the database. The interface is written in C++ using Qt. Because of the alsaplayer dependency, the target platforms will be limited to environments providing alsaplayer.
aubio is a tool designed for the extraction of annotations from audio signals. Its features include segmenting a sound file before each of its attacks, performing pitch detection, tapping the beat and producing midi streams from live audio.
Because these tasks are difficult, we thought it was important to gather them in a dedicated library. To increase the fun, we have made these algorithms work in a causal way, so as to be used in real time applications with as low delay as possible. Functions can be used offline in sound editors and software samplers, or online in audio effects and virtual instruments.
Audiodope is an audio editor. You can load and listen to music files of various formats such as wave, MP3, WMA, etc. You can also edit part or the whole stream with functions like copy, cut, paste, insert and delete. You may modify any part of the stream by applying audio effects and synthesize sound files.
Features:
Sound editing functions such as copy, cut, paste, delete, insert, trim.
AudioMass lets you record, or use your existing audio tracks, and modify them by trimming, cutting, pasting or applying a plethora of effects, from compression and paragraphic equalizers to reverb, delay and distortion effects. AudioMass also supports more than 20 hotkeys combinations and a dynamic responsive interface to ensure ease of use and that your productivity remains high. it is written solely in plain old-school javascript, weights approximately 65kb and has no backend or framework dependencies.
Loading Audio, navigating the waveform, zoom and pan
LAoE means Layer-based Audio Editor, and it is a rich featured graphical audio sample-editor, based on multi-layers, floating-point samples, volume-masks, variable selection-intensity, and many plugins suitable to manipulate sound, such as filtering, retouching, resampling, graphical spectrogram editing by brushes and rectangles, sample-curve editing by freehand-pen and spline and other interpolation curves, effects like reverb, echo, compress, expand, pitch-shift, time-stretch, and much more… And it is free of charge, under GPL license!
Flutterbird is a free, open-source effect plugin for adding pitch and volume fluctuation to incoming audio. It can be used for traditional wow/flutter effects as well as more chaotic, extreme modulation. Flutterbird has four separate oscillators with adjustable speeds that can be mapped to either pitch or volume.
PitchPerfect is a free guitar tuner that eliminates the need of tuning a guitar conventionally and will automatically detect the note you are playing. Tune your strings quickly and easily to any note you want! No longer are you constrained by standard tunings, PitchPerfect includes more than 50 alternative tunings.
SoundTouch is an open-source audio processing library for changing the Tempo, Pitch and Playback Rates of audio streams or audio files. The library additionally supports estimating stable beats-per-minute rates for audio tracks.
Tempo (time stretch): Changes the sound to play at faster or slower tempo than originally without affecting the sound pitch.
Pitch (key) : Changes the sound pitch or key while keeping the original tempo (speed).
Playback Rate : Changes both tempo and pitch together as if a vinyl disc was played at different RPM rate.
The SoundTouch library is intended for application developers writing sound processing tools that require tempo/pitch control functionality, or just for playing around with the sound effects.
The SoundTouch library source kit includes also an example utility SoundStretch for processing .wav audio files from command-line interface.
Access the source codes in gitlab or download the compiled executables.
The Audio File 