This Module is currently available.
Analog filterbank for vowel sounds
Rare Waves has brought back the Grendel Formant Filter eurorack module for 2022. This voltage-controlled analog filter effect produces vowel tones by subtractive synthesis using a bank of four bandpass filters. Version 2.2 is available now and features several choice updates. The control panel now comes in your choice of brushed anodized aluminum in silver or black. Electronically, this version now includes a 3-way Mode switch offering a convenient bypass function, as well as the new MODE 2 which adds a 5th analog filter to the effect for fuller bass response. MODE 1 is very similar to the sound of the original.
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These merchants probably sell this module. Huh?