[linux-audio-user] [ANN] ams-1.8.6 - Barber Poles

Matthias Nagorni mana at suse.de
Fri Jul 16 09:59:04 EDT 2004


recently I discovered cool Barber Pole modules on Don Buchla's page
(www.buchla.com). I remembered that the manual of my Doepfer system 
mentioned something about these effects, so I looked it up (you can 
also find it online at www.doepfer.de/a191.htm) and started to implement 
a special LFO for generation of Shepard tones and other spiral sound effects. 
Here is the result: ams-1.8.6 with several barberpole patches in the demos 
folder. Pitch- and ModWheel are bound in most examples. Try to set Gain Saw 
to 1.334 in the Barber Pole module of example_barberpole.ams. It might 
also be interesting to further decrease the LFO frequency.

Note: You may have to adjust the mixer/PCM Out volumes when playing 
the examples polyphonically. 

Don't forget that AlsaModularSynth requires the MCP/VCO/REV plugins by 
Fons Adriaensen. Efficiency and power of Fons' phaser is seen in 
example_barberpole_phaser* where 8 of them are used in a single patch.

Have a lot of fun !


Dr. Matthias Nagorni
SuSE Linux AG
Maxfeldstr. 5             phone: +49 911 74053375
D - 90409 Nuernberg       fax  : +49 911 74053483

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