We say...
A great way to add some extra channels of high-quality audio or CV I/O to your audio interface if it's equipped with S/PDIF ports that you're not using.
Manufacturer's description
- Encodes 2 analog inputs into a S/PDIF digital signal
- Decodes a S/PDIF digital signal into 2 analog outputs
- DC-coupled inputs and outputs support both CV and audio signals
- Selectable 44.1/48 kHz internal sample clock or external sync
- Digital coaxial cable connectors for S/PDIF signals (RCA)
Compact digital conversion
Spdf is a digital signal encoder and decoder for Eurorack modular synthesizers. The module converts analog audio and CV signals to and from the S/PDIF format to interconnect digitally with computer audio interfaces and other S/PDIF enabled devices.
S/PDIF Encoding & Decoding
Many audio interfaces are equipped with S/PDIF expansion ports allowing for two additional channels of input and output. Spdf takes advantage of these often unused ports, providing a digital interconnection between a computer and eurorack system.
The module accepts a 2-channel S/PDIF signal at the Rx jack (via coaxial digital cable) and converts it into two discrete analog signals available at the OUT 1 and OUT 2 jacks. Conversely, Spdf accepts two discrete analog signals at the IN 1 and IN 2 jacks and converts them into a 2-channel S/PDIF signal available at the Tx jack.
The most common configuration uses a bi-directional digital interconnection. The audio interface must have both S/PDIF In and Out ports, and the module is set to external sample clock sync.
NOTE: With the SYNC switch set to EX, the blue EXT SYNC LED will illuminate when a valid sample clock is detected at Rx.
A uni-directional digital connection is used if the audio interface has only a S/PDIF In port. The module is set to generate internal sample clock, and the interface is set to external sample clock sync.
NOTE: With the SYNC switch set to IN, the S/PDIF Rx port is completely disabled, and only the S/PDIF Tx port is active.
In addition to computer audio interfaces, Spdf can connect digitally to many other types of gear equipped with S/PDIF coaxial ports. This includes keyboards and samplers, DJ mixers and multi-player decks, digital speakers, and consumer electronics such as TVs, stereo systems, CD players and more.
IMPORTANT: Use digital coaxial cables (75 Ω) for optimal signal transmission, not regular RCA audio cables.
Analog I/O
The module’s analog inputs and outputs are DC-coupled (selectable for inputs), which means Spdf can encode and decode DC signals like control voltages. When used in conjunction with software such as Bitwig Studio or Ableton CV Tools, the module can be used to send and receive control voltages like 1V/oct pitch signals, gates, triggers, LFOs, ADSRs, and other modulators.
Spdf can also be used to digitally encode and decode audio signals. AC-coupling for the inputs may be selected (default setting), which will enable an inaudible high-pass filter to remove any DC offset prior to S/PDIF encoding.
All i/o circuitry has been carefully designed and routed for low-noise performance, with buffered inputs and outputs scaled to accept eurorack signals up to ±10 V.
Synchronization Settings
Spdf will operate only when locked to sample clock of 44.1 kHz or 48 kHz, either from an external source (S/PDIF Rx signal) or internally generated. Three DIP switches on the back of the module may be used to configure these settings, as well as to select DC or AC coupling of the inputs.
|
SYNC |
|
RATE |
|
CPL |
Input Coupling |
|
IN |
Generates and syncs to internal sample clock |
48 |
Sets the sample clock rate to 48 kHz |
DC |
Enables DC-coupling for CV signals |
|
EX |
Syncs to external clock from S/PDIF Rx |
44 |
Sets the sample clock rate to 44.1 kHz |
AC |
Enables AC-coupling for audio signals |
- Width: 5HP
- Depth: 25mm
- Power: +12V 55 mA / -12V 10mA
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 15:00 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
We say...
A great way to add some extra channels of high-quality audio or CV I/O to your audio interface if it's equipped with S/PDIF ports that you're not using.
Manufacturer's description
- Encodes 2 analog inputs into a S/PDIF digital signal
- Decodes a S/PDIF digital signal into 2 analog outputs
- DC-coupled inputs and outputs support both CV and audio signals
- Selectable 44.1/48 kHz internal sample clock or external sync
- Digital coaxial cable connectors for S/PDIF signals (RCA)
Compact digital conversion
Spdf is a digital signal encoder and decoder for Eurorack modular synthesizers. The module converts analog audio and CV signals to and from the S/PDIF format to interconnect digitally with computer audio interfaces and other S/PDIF enabled devices.
S/PDIF Encoding & Decoding
Many audio interfaces are equipped with S/PDIF expansion ports allowing for two additional channels of input and output. Spdf takes advantage of these often unused ports, providing a digital interconnection between a computer and eurorack system.
The module accepts a 2-channel S/PDIF signal at the Rx jack (via coaxial digital cable) and converts it into two discrete analog signals available at the OUT 1 and OUT 2 jacks. Conversely, Spdf accepts two discrete analog signals at the IN 1 and IN 2 jacks and converts them into a 2-channel S/PDIF signal available at the Tx jack.
The most common configuration uses a bi-directional digital interconnection. The audio interface must have both S/PDIF In and Out ports, and the module is set to external sample clock sync.
NOTE: With the SYNC switch set to EX, the blue EXT SYNC LED will illuminate when a valid sample clock is detected at Rx.
A uni-directional digital connection is used if the audio interface has only a S/PDIF In port. The module is set to generate internal sample clock, and the interface is set to external sample clock sync.
NOTE: With the SYNC switch set to IN, the S/PDIF Rx port is completely disabled, and only the S/PDIF Tx port is active.
In addition to computer audio interfaces, Spdf can connect digitally to many other types of gear equipped with S/PDIF coaxial ports. This includes keyboards and samplers, DJ mixers and multi-player decks, digital speakers, and consumer electronics such as TVs, stereo systems, CD players and more.
IMPORTANT: Use digital coaxial cables (75 Ω) for optimal signal transmission, not regular RCA audio cables.
Analog I/O
The module’s analog inputs and outputs are DC-coupled (selectable for inputs), which means Spdf can encode and decode DC signals like control voltages. When used in conjunction with software such as Bitwig Studio or Ableton CV Tools, the module can be used to send and receive control voltages like 1V/oct pitch signals, gates, triggers, LFOs, ADSRs, and other modulators.
Spdf can also be used to digitally encode and decode audio signals. AC-coupling for the inputs may be selected (default setting), which will enable an inaudible high-pass filter to remove any DC offset prior to S/PDIF encoding.
All i/o circuitry has been carefully designed and routed for low-noise performance, with buffered inputs and outputs scaled to accept eurorack signals up to ±10 V.
Synchronization Settings
Spdf will operate only when locked to sample clock of 44.1 kHz or 48 kHz, either from an external source (S/PDIF Rx signal) or internally generated. Three DIP switches on the back of the module may be used to configure these settings, as well as to select DC or AC coupling of the inputs.
|
SYNC |
|
RATE |
|
CPL |
Input Coupling |
|
IN |
Generates and syncs to internal sample clock |
48 |
Sets the sample clock rate to 48 kHz |
DC |
Enables DC-coupling for CV signals |
|
EX |
Syncs to external clock from S/PDIF Rx |
44 |
Sets the sample clock rate to 44.1 kHz |
AC |
Enables AC-coupling for audio signals |
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 15:00 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.
