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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Revision as of 21:11, 2 May 2017
The A-123 is a voltage controlled (VCF) with a cut-off slope of -24 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.[1]
The A-123 has been discontinued as the CEM 3320 IC used in this module is no longer available.[1]
Specifications
- Width: 8TE/8HP/40.3 mm
- Depth: 50 mm measured from the rear side of the front panel
- Current draw: 20mA
References
- ^ a b A-123 24dB High Pass (VCF4) at Doepfer Musikelektronik
External links
A-123 24dB High Pass (VCF4) at Doepfer Musikelektronik