A prototype is a preliminary model of something. Projects that offer physical products need to show backers documentation of a working prototype. This gallery features photos, videos, and other visual documentation that will give backers a sense of what’s been accomplished so far and what’s left to do. Though the development process can vary for each project, these are the stages we typically see:
Proof of Concept
Explorations that test ideas and functionality.
Demonstrates the functionality of the final product, but looks different.
Looks like the final product, but is not functional.
Appearance and function match the final product, but is made with different manufacturing methods.
Appearance, function, and manufacturing methods match the final product.
Audioinjector Octo surround sound card for the Raspberry Pi
We bring to you the audio card (for the Raspberry Pi) which seemed impossible, but now it is done! Push your projects further into un-trodden territory - further then others have gone before.
Whilst this gadget works with the Raspberry Pi, it represents an innovation in the realm of embedded systems. The innovation is at a hardware level, in audio signalling, giving us the ability to retrofit these systems with more then their typically quoted two channels of audio in and out.
This sound card features crystal clear 8 channel output audio, with 6 channels of input audio. Unlike other multichannel solutions, this surround hat only uses the GPIO I2S bus for audio. It doesn't use USB nor does it use HDMI.
Our first stretch goal (now achieved) will improve performance by introducing a second clock oscillator. This second oscillator will give improved performance at particular sample rates.
Stretch goal #2 at $12 000 (done)
Open hardware the RCA breakout boards. We have pushed to github the KiCad schematics and PCB layouts for the RCA breakout board. This will be a good reference if you want to design your own line breakouts.
Stretch goal #3 at $14 000 (done)
Open hardware the balanced line breakout boards. We have pushed to github the KiCad schematics and PCB layouts for the TRS breakout boards. This will be a good reference if you want to design your own balanced line breakouts.
Stretch goal #4 at $16 000
We will provide 3D printable panel templates (possibly on thingyverse). You will be able to print these panel plates to use in boxing your awesome devices !
Stretch goal #5 at $20 000
We will provide you with physical aluminium panel plates as part of your delivery ! Nothing beats the real deal ! Shipped to your door.
How do you use it ?
Nothing fancy, just plug it in and set it up like you would any other GPIO sound card. It is setup to run out of the box as the default sound output and input. That means that all of your applications will use it by default.
Professional audio recording (with 6 balanced inputs)
Multichannel output for your projects.
Car audio front/back fading.
Active crossovers, up to 8 way, or 2 speakers each 4 way.
SDR, processing many channels at the same time.
Surround sound output for your media centre.
Projects we didn't imagine you would implement !
As we have made our goal, we would like to introduce some stretch goals. If you haven't heard, stretch goals are new goal targets which (if accomplished) introduce new elements for free into pledges. We would like to hear from you (backers) what you would like to see as future stretch goals.
Clocking : Chip oscillator driven for low jitter performance.
Extra Requirements : None, just plug onto your Pi.
Software Requirements : Will be part of the stock Raspbian distribution, with drivers uploaded to the official Raspberry Pi git tree. This is similar to the previous hardware we have released and the drivers ship with standard Raspbian ready and working. We also provide setup scripts on the support forum.
From experience, Kickstarter allows you to pickup the product at a much reduced rate (our previous product was around 15% to 20% cheaper on kickstarter, mainly because of the Amazon and Ebay fees).
Risks and challenges
We have previously kickstarted and delivered a Pi sound card on time.
This is a reasonably low risk project because of the amount of prototyping and development we have put in pre launch.
We have also demonstrated our ability to prototype, manufacture, deliver and support successfully.
For those who pledge for the balanced breakout versions, we have given ourselves extra time to prepare the balanced breakouts. We will be seeking input from you as the campaign progresses on desires and needs for the balanced breakouts, so that we can make sure this product is as fully functioning as you would expect.