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nando @ ccrma
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![Frequency Central - Raging Bull Voltage Controlled Filter [MU] – Noisebug](http://www.noisebug.net/cdn/shop/products/Raging-Bull_1200x1200.jpg?v=1593109549 "Frequency Central - Raging Bull Voltage Controlled Filter [MU] – Noisebug")
Frequency Central - Raging Bull Voltage Controlled Filter [MU] – Noisebug
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![Frequency Central Voltage Controlled Filter MU [USED] | Reverb](https://images.reverb.com/image/upload/s--a7XGh9c4--/a_0/f_auto,t_large/v1685041768/nlae1juz7jixhi6t3hlr.jpg "Frequency Central Voltage Controlled Filter MU [USED] | Reverb")
Frequency Central Voltage Controlled Filter MU [USED] | Reverb
operational amplifier - Voltage Controlled Butterworth Hi-Pass Filter using a Transconductance Op Amp? - Electrical Engineering Stack Exchange
