VariSpeed 4+

Classic tape echo machine

Genuine Soundware

    • 4.8 • 5 Ratings
    • $11.99

iPad Screenshots


Authentic recreation of a classic tape echo machine.

Please note: this is an AUv3 plugin that can be used with compatible host Apps.

GSi VariSpeed is a simulation of the WEM Copicat IC-400 Belt Drive VariSpeed model, the first tape echo machine made by WEM with a DC capstan motor capable of changing speed, thus varying the delay time. GSi VariSpeed replicates the hardware instrument “as is” with all its pros and cons, without any additional feature. This can be considered as the second chapter of a tribute to the genius of Mr. Charlie Watkins that GSi began back in 2008 with the release of the freeware "WatKat", which was a simulation of the "Custom Copicat".

Ratings and Reviews

4.8 out of 5
5 Ratings

5 Ratings


Top notch dev

So far all apps I have purchased from this dev are superb! Hoping that space echo gets an app too ;)

Auctor! ,

Perfect partner in crime

One delay, I want to drop almost anywhere even in my salad

App Privacy

The developer, Genuine Soundware, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy.

Data Not Collected

The developer does not collect any data from this app.

Privacy practices may vary, for example, based on the features you use or your age. Learn More


  • Family Sharing

    Up to six family members can use this app with Family Sharing enabled.

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