PortAudio ~ Free Cross-platform Open-source Audio I/O Library

PortAudio is a free, cross-platform, open-source, audio I/O library.  It lets you write simple audio programs in ‘C’ or C++ that will compile and run on many platforms including Windows, Macintosh OS X, and Unix (OSS/ALSA). It is intended to promote the exchange of audio software between developers on different platforms. Many applications use PortAudio for Audio I/O.

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guitarix ~ Linux Virtual Guitar Amplifier

guitarix is a virtual guitar amplifier for Linux running on Jack Audio Connection Kit. It is free as in speech and free as in beer. The available source code allows you to build it on other UNIX-like systems too, namely BSD and MacOSX.

guitarix takes the signal from your guitar as any real amp would do: as a mono-signal from your sound card. The input is processed by a main amp and a rack-section. Both can be routed separately and deliver a processed stereo-signal via Jack. You may fill the rack with effects from more than 25 built-in modules from a simple noise gate to brain-slashing modulation f/x stuff like flanger, phaser or auto-wah.

Guitarix_0.35.0

guitarix 0.35.0

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SourceForge

Qtractor ~ Audio / MIDI Multi-track Sequencer

Qtractor is an Audio/MIDI multi-track sequencer application written in C++ with the Qt framework. Target platform is Linux, where the Jack Audio Connection Kit (JACK) for audio, and the Advanced Linux Sound Architecture (ALSA) for MIDI, are the main infrastructures to evolve as a fairly-featured Linux desktop audio workstation GUI, specially dedicated to the personal home-studio.

qtractor-screenshot16

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Wikipedia

Wave Editor ~ Free Audio Editor

Wave Editor is fast and easy digital audio editing software for Windows. It provides a powerful and user-friendly editing environment which especially suits beginners. Quickly perform basic editing capabilities like cutting, copying, pasting and deleting parts of a recording.

Unlike the other sound editors based on the same ActiveX engine, our editor was developed from the ground up to be easy in use and fast. The user interface was designed with speed, accuracy and ease of use in mind.

The key feature of Wave Editor is a simple selection of audio blocks during playback. Non-destructive editing allows you to make simulated changes to an audio track without overwriting the original file.

wave editor

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