The Doepfer A-148 Dual Sample & Hold/Track & Hold module provides you with two identical S&H sub-modules. Each of these is designed to generate 'staircase' voltages. Patching in a signal to the sample input of a sub-module allows the A-148 to sample the signal at a rate set by the signal that is patched into the trigger input, and is held at that voltage at the S&H output. The 'staircase' shape of the voltage is determined by the type of waveform patched into the sample input. Patching in noise or random signals will result in random patters, whilst an LFO would produce a rising or falling staircase pattern. Each sub-module is equipped with an LED to provide visual indication of the voltage polarity of the sampled signal.
Usage Examples
Random Arpeggios
The A-148 can be used in conjunction with a module such as the Doepfer A-118 to create random voltages from the A-118's random output. An LFO triggers the S&H module, so that with every oscillation of the LFO, a new random voltage is output to your VCO's CV input. If you patch an A-130 VCA in before the VCO, you can adjust the Gain and Out amounts to restrict the frequency range of the random voltages to whatever you desire. You can also use a similar setup, but patch the S&H voltage output to the CV input of a filter set to high resonance to produce a variety of interesting rhythmic timbral changes.
Glisando
If the CV output from a keyboard is patched into the Doepfer A-170 Slew Limiter, the A-148 can be triggered by the rising edge of an LFO, which samples the output from the slew limiter, and produces a staircase voltage which controls the pitch of a VCO. With this configuration, playing two notes, particularly ones that are spaced widely apart, produces an interesting glissando effect.
Controls & Indicators
Indication LED: Each sample and hold sub-module features an LED to give you visual feedback regarding the polarity of the sampled and held signal
Inputs/Outputs
Each S&H sub-module/section features the same I/O configuration.
Trig. In: This is the sub-module's trigger input. The trigger input signal determines the rate at which the sampling takes place. Triggering takes place at the leading edge of the waveform, so the pulse width is not important
Smp. In: This is the sub-module's sample input. Simply patch in the signal you wish to sample. The voltage must be in the range of -12V to +12V to prevent damage to the module
S&H Out: This is the sub-module's output for the sampled and held signal
Specifications
Width: 4HP/20mm
Depth: 30mm (Measured from the rear side of the front panel)
Current:
+12V: +20mA
-12V: -20mA
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
The Doepfer A-148 Dual Sample & Hold/Track & Hold module provides you with two identical S&H sub-modules. Each of these is designed to generate 'staircase' voltages. Patching in a signal to the sample input of a sub-module allows the A-148 to sample the signal at a rate set by the signal that is patched into the trigger input, and is held at that voltage at the S&H output. The 'staircase' shape of the voltage is determined by the type of waveform patched into the sample input. Patching in noise or random signals will result in random patters, whilst an LFO would produce a rising or falling staircase pattern. Each sub-module is equipped with an LED to provide visual indication of the voltage polarity of the sampled signal.
Usage Examples
Random Arpeggios
The A-148 can be used in conjunction with a module such as the Doepfer A-118 to create random voltages from the A-118's random output. An LFO triggers the S&H module, so that with every oscillation of the LFO, a new random voltage is output to your VCO's CV input. If you patch an A-130 VCA in before the VCO, you can adjust the Gain and Out amounts to restrict the frequency range of the random voltages to whatever you desire. You can also use a similar setup, but patch the S&H voltage output to the CV input of a filter set to high resonance to produce a variety of interesting rhythmic timbral changes.
Glisando
If the CV output from a keyboard is patched into the Doepfer A-170 Slew Limiter, the A-148 can be triggered by the rising edge of an LFO, which samples the output from the slew limiter, and produces a staircase voltage which controls the pitch of a VCO. With this configuration, playing two notes, particularly ones that are spaced widely apart, produces an interesting glissando effect.
Controls & Indicators
Indication LED: Each sample and hold sub-module features an LED to give you visual feedback regarding the polarity of the sampled and held signal
Inputs/Outputs
Each S&H sub-module/section features the same I/O configuration.
Trig. In: This is the sub-module's trigger input. The trigger input signal determines the rate at which the sampling takes place. Triggering takes place at the leading edge of the waveform, so the pulse width is not important
Smp. In: This is the sub-module's sample input. Simply patch in the signal you wish to sample. The voltage must be in the range of -12V to +12V to prevent damage to the module
S&H Out: This is the sub-module's output for the sampled and held signal
Specifications
Width: 4HP/20mm
Depth: 30mm (Measured from the rear side of the front panel)
Current:
+12V: +20mA
-12V: -20mA
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.
