Module A-134-2 contains two identical voltage controlled crossfader units.
Each unit has two voltage controlled amplifiers (VCAs) with opposite control behaviour available. The outputs of the two VCAs are mixed together to obtain a common output. The behaviour of the control voltage inputs can be chosen with an internal jumper:
Symmetrical mode: If the corresponding jumper is not set both VCAs of the crossfader have the same 50% amplification with zero CV. If the applied CV becomes positive the amplification of VCA1 decreases and those of VCA2 increases in the same way. A negative CV has the opposite result. The CV voltage range to obtain the maximum/minimum positions of the crossfader is about -2.5....+2.5V. This mode is useful for bidirectional (i.e. positive and negative) control voltages, for example LFO or joy stick (adjusted to 0V CV in center position).
Asymmetrical mode: If the corresponding jumper is set VCA2 is fully closed and VCA1 has full 100% amplification with zero CV. If the applied CV becomes positive the amplification of VCA1 decreases and those of VCA2 increases in the same way. The CV voltage range to obtain the maximum/minimum positions of the crossfader is about 0....+5V. A negative CV has no function in this mode. This mode is useful for unidirectional (i.e. only positive) control voltages, for example ADSR, ribbon controller or Theremin control voltage.
The CV input of the upper unit (CV1) is normalled to the CV input of the lower unit (CV2). I.e. if no plug is inserted to CV2 the CV input of the upper unit (CV1) also controls the lower unit.
The second signal input of the upper unit (In1B) is normalled to the first signal input of the lower unit (In2A). I.e. if no plug is inserted into In2A the signal In1B is used as the first signal input of the second unit.
As the inputs and outputs are DC coupled the module can be used for both audio and control voltage signal processing.
The module can be modified to have only one common output available, i.e. output 1 and output 2 are mixed together and appear at the Out 2 socket. With this modification the module can be used in combination with the Joy Stick module A-174 as a two-dimensional crossfader, i.e. four signals are mixed to one output with the joy stick position defining the relation between the signals. In this application Out 1 has no function. Both units of the A-134-2 have to be set to symmetrical mode:
- Joystick in center position (CVX = 0V, CVY = 0V): In1A = 50%, In1B = 50%, In2A = 50%, In2B = 50%, i.e. all four signals have nearly the same level
- Joystick in upper position (CVY ~ +3.5V, CVX = 0V): In1A = 100%, In1B = 0%, In2A = 50%, In2B = 50%
- Joystick in lower position (CVY ~ -3.5V, CVX = 0V): In1A = 0%, In1B = 100%, In2A = 50%, In2B = 50%
- Joystick in right position (CVY = 0V, CVX ~ +3.5V): In1A = 50%, In1B = 50%, In2A = 100%, In2B = 0%
- Joystick in left position (CVY = 0V, CVX ~ -3.5V): In1A = 50%, In1B = 50%, In2A = 0%, In2B = 100%
Applications:
- Using the CV X and CV Y outputs of the joy stick module A-174 to crossfade between different audio or control voltage signals:
- voltage controlled crossfading ("morphing") between audio signals (e.g. two VCO waveforms or VCO and noise or two VCF outputs)
- voltage controlled crossfading between different modulation voltages (e.g. two different LFO waveforms of the same LFO, two different LFOs or LFO and ADSR)
Meaning of the jumpers:
- JP2: offset upper unit (when installed offset = 0V, when not installed offset = +2.5V)
- JP3: offset lower unit (when installed offset = 0V, when not installed offset = +2.5V)
- Individual outputs for upper/lower unit: JP4, JP5 and JP6 installed
- common output Out 2 for both units: JP4 and JP5 installed, JP6 removed and the pins of JP4 and JP5 have to be connected (as jumpers are installed to JP4 and JP5 it does not matter which of the pins of JP4 and JP5 are connected). In this case the socket Out 1 has no function and Out 2 is the sum output for both units!
Width:4 HP / 20.0 mm
Depth: 45 mm (measured from the rear side of the front panel)
Current: +20mA (+12V) / -10mA (-12V)
How much is my shipping?
Shipping is automatically calculated before you submit your payment information. Simply add items to your cart and proceed to the checkout page, where you'll be offered shipping options and their prices. In the UK it's normally around £4 for order values under £150, and free above that. Shipping to mainland EU is typically between £7 and £20, depending on the shipping method and the size and weight of the order.
Do you ship to my country?
Almost certainly - the site will give you an estimate of shipping costs if you add an item to the cart and then enter your country and postcode. If you have specific requirements (such as if you prefer UPS over FedEx, for example) then let us know in advance and we'll try to work something out for you.
Shipping methods
We use a combination of Parcelforce, DPD, Royal Mail and UPS for the UK, and for international orders it's either Royal Mail, UPS, DHL or FedEx depending on where you are in the world. If you have a particular preference then try to let us know BEFORE you order so we can look into it for you. Please note that there may occasionally be additional shipping charges if you live in a remote area, depending on what surcharges are applied by the shipper. We'll get in touch to discuss this with you in such cases.
Dispatch times
For UK orders, we normally dispatch the same working day if we get the order before 15:00. If you have a really urgent situation then of course drop us an email before ordering and we'll always do our absolute best to accommodate you.
For international orders, we normally dispatch the same day if we get the order before 13:00 but again, occasionally it might be the next day before we can send it out, and sometimes FedEx or UPS may come a little earlier than scheduled which would also push an order into the next day.
Shipping times
Since April 2020 the couriers we use have suspended guarantees for shipping times, so even though we're paying them for priority services - 24-48 hours for most of the world - in practice it's often an extra day on top and sometimes it can be longer.
There is absolutely nothing we can do about this unfortunately. If you are outside the UK and it's a life-or-death situation where you absolutely MUST have that passive mult for the next day then... it may be better to find a local supplier.
Saturday shipping
If you're in the UK and you order before 15:30 on a Friday then we can send something for a Saturday delivery (NB: this applies to UK mainland addresses only). The success rate with DPD is about 95% so it's worth a punt most of the time. Please note that if you select Saturday shipping on an order placed earlier in the week, we'll wait until Friday to ship it.
Pre-orders
If a product is listed as a pre-order, it means we've ordered it from the supplier but it's not physically in stock yet. The product listing will include an estimated shipping date based on the best information we have from the supplier, but do bear in mind this is subject to change and is not a guaranteed date.
If you place an order containing a mixture of in-stock and pre-order items, we'll normally hold off on shipping anything until the pre-order item(s) have arrived, rather than splitting it into multiple shipments. If you need the in-stock items sooner, we'd recommend placing separate orders. As always, please get in touch if you have questions.
Product Overview
Module A-134-2 contains two identical voltage controlled crossfader units.
Each unit has two voltage controlled amplifiers (VCAs) with opposite control behaviour available. The outputs of the two VCAs are mixed together to obtain a common output. The behaviour of the control voltage inputs can be chosen with an internal jumper:
Symmetrical mode: If the corresponding jumper is not set both VCAs of the crossfader have the same 50% amplification with zero CV. If the applied CV becomes positive the amplification of VCA1 decreases and those of VCA2 increases in the same way. A negative CV has the opposite result. The CV voltage range to obtain the maximum/minimum positions of the crossfader is about -2.5....+2.5V. This mode is useful for bidirectional (i.e. positive and negative) control voltages, for example LFO or joy stick (adjusted to 0V CV in center position).
Asymmetrical mode: If the corresponding jumper is set VCA2 is fully closed and VCA1 has full 100% amplification with zero CV. If the applied CV becomes positive the amplification of VCA1 decreases and those of VCA2 increases in the same way. The CV voltage range to obtain the maximum/minimum positions of the crossfader is about 0....+5V. A negative CV has no function in this mode. This mode is useful for unidirectional (i.e. only positive) control voltages, for example ADSR, ribbon controller or Theremin control voltage.
The CV input of the upper unit (CV1) is normalled to the CV input of the lower unit (CV2). I.e. if no plug is inserted to CV2 the CV input of the upper unit (CV1) also controls the lower unit.
The second signal input of the upper unit (In1B) is normalled to the first signal input of the lower unit (In2A). I.e. if no plug is inserted into In2A the signal In1B is used as the first signal input of the second unit.
As the inputs and outputs are DC coupled the module can be used for both audio and control voltage signal processing.
The module can be modified to have only one common output available, i.e. output 1 and output 2 are mixed together and appear at the Out 2 socket. With this modification the module can be used in combination with the Joy Stick module A-174 as a two-dimensional crossfader, i.e. four signals are mixed to one output with the joy stick position defining the relation between the signals. In this application Out 1 has no function. Both units of the A-134-2 have to be set to symmetrical mode:
- Joystick in center position (CVX = 0V, CVY = 0V): In1A = 50%, In1B = 50%, In2A = 50%, In2B = 50%, i.e. all four signals have nearly the same level
- Joystick in upper position (CVY ~ +3.5V, CVX = 0V): In1A = 100%, In1B = 0%, In2A = 50%, In2B = 50%
- Joystick in lower position (CVY ~ -3.5V, CVX = 0V): In1A = 0%, In1B = 100%, In2A = 50%, In2B = 50%
- Joystick in right position (CVY = 0V, CVX ~ +3.5V): In1A = 50%, In1B = 50%, In2A = 100%, In2B = 0%
- Joystick in left position (CVY = 0V, CVX ~ -3.5V): In1A = 50%, In1B = 50%, In2A = 0%, In2B = 100%
Applications:
- Using the CV X and CV Y outputs of the joy stick module A-174 to crossfade between different audio or control voltage signals:
- voltage controlled crossfading ("morphing") between audio signals (e.g. two VCO waveforms or VCO and noise or two VCF outputs)
- voltage controlled crossfading between different modulation voltages (e.g. two different LFO waveforms of the same LFO, two different LFOs or LFO and ADSR)
Meaning of the jumpers:
- JP2: offset upper unit (when installed offset = 0V, when not installed offset = +2.5V)
- JP3: offset lower unit (when installed offset = 0V, when not installed offset = +2.5V)
- Individual outputs for upper/lower unit: JP4, JP5 and JP6 installed
- common output Out 2 for both units: JP4 and JP5 installed, JP6 removed and the pins of JP4 and JP5 have to be connected (as jumpers are installed to JP4 and JP5 it does not matter which of the pins of JP4 and JP5 are connected). In this case the socket Out 1 has no function and Out 2 is the sum output for both units!
Technical Specs
Shipping Details
How much is my shipping?
Shipping is automatically calculated before you submit your payment information. Simply add items to your cart and proceed to the checkout page, where you'll be offered shipping options and their prices. In the UK it's normally around £4 for order values under £150, and free above that. Shipping to mainland EU is typically between £7 and £20, depending on the shipping method and the size and weight of the order.
Do you ship to my country?
Almost certainly - the site will give you an estimate of shipping costs if you add an item to the cart and then enter your country and postcode. If you have specific requirements (such as if you prefer UPS over FedEx, for example) then let us know in advance and we'll try to work something out for you.
Shipping methods
We use a combination of Parcelforce, DPD, Royal Mail and UPS for the UK, and for international orders it's either Royal Mail, UPS, DHL or FedEx depending on where you are in the world. If you have a particular preference then try to let us know BEFORE you order so we can look into it for you. Please note that there may occasionally be additional shipping charges if you live in a remote area, depending on what surcharges are applied by the shipper. We'll get in touch to discuss this with you in such cases.
Dispatch times
For UK orders, we normally dispatch the same working day if we get the order before 15:00. If you have a really urgent situation then of course drop us an email before ordering and we'll always do our absolute best to accommodate you.
For international orders, we normally dispatch the same day if we get the order before 13:00 but again, occasionally it might be the next day before we can send it out, and sometimes FedEx or UPS may come a little earlier than scheduled which would also push an order into the next day.
Shipping times
Since April 2020 the couriers we use have suspended guarantees for shipping times, so even though we're paying them for priority services - 24-48 hours for most of the world - in practice it's often an extra day on top and sometimes it can be longer.
There is absolutely nothing we can do about this unfortunately. If you are outside the UK and it's a life-or-death situation where you absolutely MUST have that passive mult for the next day then... it may be better to find a local supplier.
Saturday shipping
If you're in the UK and you order before 15:30 on a Friday then we can send something for a Saturday delivery (NB: this applies to UK mainland addresses only). The success rate with DPD is about 95% so it's worth a punt most of the time. Please note that if you select Saturday shipping on an order placed earlier in the week, we'll wait until Friday to ship it.
Pre-orders
If a product is listed as a pre-order, it means we've ordered it from the supplier but it's not physically in stock yet. The product listing will include an estimated shipping date based on the best information we have from the supplier, but do bear in mind this is subject to change and is not a guaranteed date.
If you place an order containing a mixture of in-stock and pre-order items, we'll normally hold off on shipping anything until the pre-order item(s) have arrived, rather than splitting it into multiple shipments. If you need the in-stock items sooner, we'd recommend placing separate orders. As always, please get in touch if you have questions.
