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  6-th order Butterworth high-pass 27 Jan 15

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  Flying Echo 27 Jan 15

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  The Pulsor 4 Mar 16

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  Flying Echo Pro 27 Jan 15

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  NE Frequency Multiply 27 Jan 15

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  6-th order Butterworth low-pass 27 Jan 15

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  3-rd order Butterworth high-pass 27 Jan 15

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  Discovery 27 Oct 18