Doepfer A123: Difference between revisions
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The '''A-123''' is a [[voltage controlled]] (VCF) with a [[cut-off slope]] of -24 [[Decibel|dB]]/octave. The cut-off frequency determines the point at which filtering takes effect and can be controlled manually, or by voltage control (filter modulation, for instance by an [[LFO]]). Two CV inputs are available. [[Resonance]] (Emphasis or Q ) can be adjusted manually, or by voltage control (VCQ), right up to [[self-oscillation]], in which case it will behave like a [[sine wave]] [[oscillator]].<ref name="a123">[http://www.doepfer.de/a123.htm A-123 24dB High Pass (VCF4)] at Doepfer Musikelektronik</ref> |
The '''A-123''' is a [[voltage controlled]] (VCF) with a [[cut-off slope]] of -24 [[Decibel|dB]]/octave. The cut-off frequency determines the point at which filtering takes effect and can be controlled manually, or by voltage control (filter modulation, for instance by an [[LFO]]). Two CV inputs are available. [[Resonance]] (Emphasis or Q ) can be adjusted manually, or by voltage control (VCQ), right up to [[self-oscillation]], in which case it will behave like a [[sine wave]] [[oscillator]].<ref name="a123">[http://www.doepfer.de/a123.htm A-123 24dB High Pass (VCF4)] at Doepfer Musikelektronik</ref> |
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The A-123 has been discontinued as the [[CEM 3320]] [[IC]] used in this module is no longer available.<ref name="a123"/> |
The A-123 has been discontinued as the [[CEM 3320]] [[IC]] used in this module is no longer available.<ref name="a123" /> |
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==Specifications== |
== Specifications == |
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*Width: 8TE/8HP/40.3 mm |
* Width: 8TE/8HP/40.3 mm |
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*Depth: 50 |
* Depth: 50 mm measured from the rear side of the front panel |
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*Current draw: 20mA |
* Current draw: 20mA |
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==References== |
== References == |
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{{reflist}} |
{{reflist}} |
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==External links== |
== External links == |
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[http://www.doepfer.de/a123.htm A-123 24dB High Pass (VCF4)] at Doepfer Musikelektronik |
[http://www.doepfer.de/a123.htm A-123 24dB High Pass (VCF4)] at Doepfer Musikelektronik |
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