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$5,863
pledged of $3,697 goal
backers

All or nothing. This project will only be funded if it reaches its goal by .

$5,863
pledged of $3,697 goal
backers

All or nothing. This project will only be funded if it reaches its goal by .

About

This is an ultra high quality ultrasound card. It gives high fidelity input and output audio. It also features digital output (S/PDIF) and dual microphones.

The Ultra 2 sound card stack. The sound card (bottom), the pre-amp (middle) and the Balanced IO board (top).
The Ultra 2 sound card stack. The sound card (bottom), the pre-amp (middle) and the Balanced IO board (top).

This ultra sound card provides stereo analogue output and input. The output can also be sent using the optical SPDIF connector. It has two input microphones. It comes as a three layer stack of boards. The first board is the base sound card. The second board is a balanced pre-amplifier. The third board is a passive input/output connector board.

Premium specifications

The sound card is ultra because it uses premium components to ensure a low noise floor, low jitter and low harmonic distortion. It also provides optional balanced signal drivers and receivers.

The Ultra 2 sound card - a DC coupled premium sound card.
The Ultra 2 sound card - a DC coupled premium sound card.

 Ultrasound

The sound card is ultrasound because it can output/input analogue frequencies extending up to the untrasonic frequencies. Such high frequencies require a digital 192 kHz sample rate.

Line drivers

The balanced preamp board steps the signal levels up to professional line levels of 10 V peak to peak. The outputs use balanced line drivers so that no matter whether you are driving RCA cables or XLR/TRS lines, you will have crystal clear ground loop free audio.

The AC coupled balanced preamp board. This board amplifies the sound card's signal to professional levels.
The AC coupled balanced preamp board. This board amplifies the sound card's signal to professional levels.

DC capable

The base sound card supports DC capable inputs and outputs. This allows modular synth designers to build interface boards to control their rigs.

We need your input

Please drop comments on our campaign and feel free to visit our support/discussion forum. We are really keen to get your ideas on how to make this product more suitable for your needs. This campaign kicks off with the 16 th revision of this product. We have already integrated a large amount of your feedback and suggestions - please keep it coming !

Previous Kickstarter Projects : 

 The audio injector pi sound card : successful and shipped

The audio injector octo sound card for the Pi : successful and shipped

The audio injector zero sound card for the Pi : successful and shipped

The PCB quick connect clip : successful and shipped

Ultra Specifications : 

  • Direct Inputs : Unpopulated Analogue Connectors (stereo RCAs and 1/4" jacks provided)
  • Direct Outputs : Unpopulated Analogue Connectors (stereo RCAs and 1/4" jacks provided)
  • Digital Optical SPDIF (Optical transducer provided)
  • Microphone : Two high quality microphones with extended high frequency (ultrasound) response (model - SPU0410LR5H) surface mount microphones populated for you.
  • Sample rate : 192 kHz, 24 bit (32 bit bus)
  • Analogue cut freq. : 96 kHz
  • Jitter control : Low jitter clock oscillator
  • Hardware: Works with the Raspberry Pi2, Pi3 and Zero, etc.
  • Codec : cs4265 (detail here)
  • Film capacitors in the (non biased) line driver/receiver audio paths - yielding low harmonic distortion levels.
  • NJM4580E Specialised audio op-amps for the highest fideilty
  • Mute line driven outputs - for silence !
  • Base card breakout pins give : {5v, Rin, Lin, InGND}, {Rout, Lout, GND, Mute}
  • Balanced line drivers to omit ground loops
  • Preamp card breakout pins give : {Rout+, Rout-, Lout+, Lout-, GND}, {Rin+, Rin-, Lin+, Lin-, GND}
  • The IO breakout board allows you to plug either balanced connectors or RCA connectors.
  • Balanced output connectors : 1/4" TRS sockets (provided and unpopulated)
  • Balanced input connectors : 1/4" TRS sockets (provided and unpopulated)
  • Unbalanced output connectors : RCA sockets (provided and unpopulated)
  • Unbalanced input connectors : RCA sockets (provided and unpopulated)
  • The ability to wire your own IO boards so you can use your own connectors (if you don't want to use those provided).
  • The ability to plug in your own preamps so you can design your own purpose built preamps and simply plug the base sound card into your products.
  • Linux driver pre-integrated into the Raspberry Pi Kernel.

Board connections :

The board connections use standard 2.54 mm headers, which are supplied. You will need to solder to connect these to the boards. There are a few 4 pin headers and a few 6 pin headers. There are also the RCA and TRS connectors.

If you don't want to use the supplied RCA and TRS connectors, you can directly wire out from the preamp board to your hardware with full functionality.

The Pi to Ultra 2 connection requires a standard 40 Pin Pi connector. This is not supplied with the board. You can purchase a quick connect clip which requires no soldering from the DIY Electronics section of our shop here. Or you can source a standard header and solder it onto the board.

Stretch Goals :

At $7000 : A second IO board allowing you to have one dedicated to RCAs and one dedicated TRS jacks.

Risks and challenges

This is a reasonably low risk project. We have previously had four Kickstarter projects and shipped those products on time. This sound card is already prototyped and tested - we are up to the 16th revision at the launch of this project.

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Support

  1. Make a pledge without a reward

    AU$
    About $7
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  2. Select this reward

    Pledge AU$ 35 or more About $26

    1 Ultra sound card (around $25 USD)

    You will receive 1 audio injector ultra sound card plus any stretch goal items.

    Shipping is around $5 USD.
    Targeting delivery in September.

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  3. Select this reward

    Pledge AU$ 70 or more About $52

    2 Ultra sound cards (around $25 USD ea)

    You will receive 2 audio injector ultra sound cards plus any stretch goal items.

    Targeting delivery in September.

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    29 backers
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    About $52
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  4. Select this reward

    Pledge AU$ 105 or more About $78

    3 Ultra sound cards (around $25 USD ea)

    You will receive 3 audio injector ultra sound cards plus any stretch goal items.

    Targeting delivery in September.

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    8 backers
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    About $78
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  5. Select this reward

    Pledge AU$ 140 or more About $104

    4 Ultra sound cards (around $25 USD ea)

    You will receive 4 audio injector ultra sound cards plus any stretch goal items.

    Targeting delivery in September.

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    5 backers
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    About $104
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  6. Select this reward

    Pledge AU$ 175 or more About $129

    5 Ultra sound cards (around $25 USD ea)

    You will receive 5 audio injector ultra sound cards plus any stretch goal items.

    Targeting delivery in September.

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    0 backers
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    About $129
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  7. Select this reward

    Pledge AU$ 350 or more About $259

    10 Ultra sound cards (around $25 USD ea)

    You will receive 10 audio injector ultra sound cards plus any stretch goal items.

    Targeting delivery in September.

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    1 backer
    AU$
    About $259
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  8. Select this reward

    Pledge AU$ 525 or more About $388

    15 Ultra sound cards (around $25 USD ea)

    You will receive 15 audio injector ultra sound cards plus any stretch goal items.

    Targeting delivery in September.

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    0 backers
    AU$
    About $388
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  9. Select this reward

    Pledge AU$ 700 or more About $518

    20 Ultra sound cards (around $25 USD ea)

    You will receive 20 audio injector ultra sound cards plus any stretch goal items.

    Targeting delivery in September.

    Less
    Estimated delivery
    Ships to Anywhere in the world
    0 backers
    AU$
    About $518
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