Resound is a software audio delay effect processor that emulates the sound and operation of vintage magnetic-tape echo units. A controllable noise level allows the right amount of grit, distortion, and flutter through. The Reverse mode adds further flexibility: by playing each delay backwards, Resound can produce unique effects beyond what hardware magnetic-tape units are capable of.

It's available in both 32 and 64 bit versions and the tarball has the VST and Standalone (JACK and ALSA) executable versions.

Features:

• Delay time up to 30 seconds when synced to host tempo, up to 2 seconds when not synced.
• Controllable noise level and high-pass filter.
• Reverse mode to produce more complex and interesting delay textures.
• Capable of self-oscillation, even without any input source.
• MIDI Learn mode for easy integration with any MIDI hardware controller.

Click to see the Resound Manual

Changes in v1.6.0

• Integrated undo and redo, with unlimited history size.
• Split mechanical tape emulation controls into separate Noise and Flutter parameters.
• Category support in preset browser.
• MIDI Program Changes are now multi-threaded, and so will no longer potentially stall the audio synthesis.
• Slightly reduced CPU usage and removed potential audio thread stall that could rarely occur when editing parameters.
• Fix for rare issue that stopped presets from loading when LADSPA plug-in support is enabled.
• Factory presets now load significantly faster.
• Fix for crash (on both Windows and Linux) that could occur when 'space' is pressed when confirming the overwrite preset dialog.
• Preset meta data (ie, author name, notes, tags) is now correctly displayed after loading an .FXP based preset or restoring a saved project.
• VU meters now automatically reset their overload status after a few seconds.
• Various host compatibility fixes.
• Now with a printable PDF manual.

Changes in v1.5.0

• Noise parameter is now scaled such that wow, flutter, and mechanical noise of the tape machine are completely absent at 0%. Older presets will still sound identical.
• Reversed delay tempo syncing has been improved with hosts that don't provide accurate PPQ.
• Native 64-bit support for Linux VST plugins and Standalone applications.
• Integrated Preset Browser, with meta-data, tags, searching, and hot-swap support.
• Reduced CPU usage.
• Various host compatibility fixes.
• Additional presets.

New in v1.4.1

• Native 64-bit versions for Windows (VST) and Mac OS X (Audio Unit).
• Compatibility fixes for various hosts.
• Mac OS X components are now packaged with an uninstaller.
• Vastly reduced memory usage.
• Improved feedback algorithm. For 100% compatibility with legacy projects, the older algorithm can be enabled using the Backwards Compatibility options.
• Fix for an intermittent noisy timbre that could occur under certain hosts.