As for all the updates released so far, TwistedWave 1.7 is freely available for all the registered users. It contains a number of new features, fixes and improvements, the most important ones being the new support for batch processing, and the DIRAC Time Stretch/Pitch Shift technology, licensed from The DSP Dimension, one of the best pitch shifting implementations, an excellent replacement for Apple’s built in pitch shifting algorithms.

The detailed list of new features, fixes and improvements can be found in the release notes. The most important ones are detailed below.

Batch processing

TwistedWave now has a very powerful batch processing engine. It can work on any number of files, and apply any number of effects on them, such as amplifying, applying an Audio Unit or changing the frame rate, for instance.

After a file has been processed, it can be saved in a different file format. Because TwistedWave can read and write in many different file formats, this makes a very powerful batch converter.

The batch processing can also be used to generate the waveform image from a list of files. This can be used to generate small images representing sound files to build a web site, for instance.

DIRAC Time Stretch/Pitch Shift technology

Before TwistedWave 1.7, the Change Pitch and Speed effect was using Apple’s built-in implementation.

Now, it uses the DIRAC Time Stretch/Pitch Shift technology, licensed from The DSP Dimension. It sounds very good, and is really usable for pro audio work.

The “Change Pitch and Speed” window has been extended with a few settings specific to the DIRAC algorithm, such as the formant correction that makes it possible to do a more natural pitch transformation.

The lambda setting offers the ability to select a time/frequency tradeoff. You can find more information on this in the manual, available directly by pressing the (?) button in the lower left corner of the window.

Pitch correction

Another feature available with the DIRAC technology is the automatic pitch correction. Given a piece of audio, DIRAC will automatically pitch shift it to the closest note. This is available from the main menu, in Effects / Pitch Correction…

Other improvements

• Support for saving WMA files.
• Added support for the MS and IMA4 ADPCM codec.
• Clicking on a marker moves the cursor.
• Selecting markers in the markers window selects the corresponding audio regin.
• Avoid doing a selection by mistake with a simple click.
• More bug fixes and improvements…