HAMU - Rack Extensions


Rack Extensions for Propellerheads Reason






We love patch cables. The back plane of Reason is the place for creativity and magic. Our Rack Extensions is our humble contribution to empower all experimentalists with more flexibility and tools for the exploration of Sounds!





The ModSweeper lets you sweep any knob or fader from any pair of keys on your midi keyboard.


Now you can easily modulate your filters, distortion levels etc. of your favourite devices from your keyboard. Just press e.g. key C#0 to increase and D#0 to decrease the setting. You control the ModSweeper with any gate or trigger CV input signals, which you typically get from MidiTapper devices, but Kong or Thor can also be used, and maybe other REs too. With a sweep time from 0.1s up to 32s, you can use ModSweeper to create slow ambient sweeps as well as fast and dramatic effects. For stepped parameters, like selectors, you should check out the twin device ModStepper.




Yes, it's one more of those CV devices and, yes, it will make it easier for you to control important parameters in your rack setup. Aimed especially maybe, at musicians who use their Reason in live performance situations. ModSweeper primarily targets modulation of continuous knobs and faders, but can also be used for stepped controllers. For stepped controllers, the free device ModStepper is actually mostly a better choice.


This is a CV transformation device which typically takes pulse and gate signals on the inputs and generates a steady or sweeping signal on the outputs.







The typical use of the ModSweeper lets you sweep any device parameter from any pair of keys on your midi keyboard. You can control the ModSweeper with any gate or trigger CV input signals, which you typically get from MidiTapper devices, but Kong or Thor can also be used, and other REs too, like VOLT SL-1. The MidiTapper, however, is especially well suited to use all the features of the ModSweeper, with it's Tap and double tap outputs. The output CV can go directly to the modulation socket of the target parameter, like the filter mod of the Malström in the setup pictured above. If there is no socket, you use a Combinator CV input and route this in the Combinator programmer to affect the target parameter.


Check out the video for how to setup ModSweeper for typical use, using MidiTapper as a source for the modulation inputs of the buttons. And if you are an experienced CV and cable user, I'm sure you can find other interesting ways to use this device!



There are three up/down pairs of buttons/inputs, which move the out level in different ways and amounts, and one knob to specify how long time it will take for a sweep between 0.0V and 1.0V (for the unipolar output).


Up and down buttons/signals:


to move the outputs up or down at the rate defined by SWEEP TIME. Push both at the same time to immediately move output to mid point.


to move the output in steps of 1/25 of the full scale by each step, equalling 0.04V on the unipolar output, i.e. 1/5 of a jump.


to move in larger steps. 1/5 of the full scale to be exact, 0.2V on the unipolar output.



The ModSweeper was developed mainly as an extention for the MidiTapper, so there is, or will soon be, be a bundle available, including MidiTapper and ModSweeper.


For those of you who have already bought the MidiTapper, there is an even better offer! Just send an email to, from your own email address so we can keep contact. Tell us when you bought MidiTapper, and whether you live in Europe, North America or elsewhere. We will give you a free ModSweeper in return for your effort! =)



Defines how long time it takes to move the whole scale from end to end. Availble settings go from 0.1 to 32 seconds.





The End