* Tested on iPad Air (M1) with 24bit, 96kHz sampling rate and 32 sample buffer size
** Due to bandwith limitations of USB 2.0, the maximum sampling rate will be 48kHz.
Consistently designed for mobile use on small live sessions with hardware synths, drum computers, modular systems and external effects units.In conjunction with an iPad* and hardware controller, the combination becomes an easily transportable, highly flexible performance mixer with effects chain and complex routing options. Always perfectly tailored to the requirements of the respective setup.
With 24bit resolution at 96kHz, less than 4ms roundtrip latency (tested with an iPad Air M1) and converters with 110dB dynamic range, even the highest demands are met.
The integrated headphone amplifier allows pre-listening separately from the master out. USB Audio Class Compliance 2.0 and power supply via USB simplify connection and eliminate the need for additional cables and mains adapters.
The consistent use of stereo mini jacks also enables a compact and cost-effective design and simplifies the connection of smaller synthesizers, which are often also equipped with mini jack outputs.
Larger devices can also be easily connected using the mini jack to dual mono jack Y-cables. Of course, the channels can also be used mono with corresponding Y cables.
The use of line levels at the inputs eliminates the need for additional preamps and dedicated gain controls. The high resolution of 24bit and 96kHz as well as the dynamic range of 110dB offer sufficient scope for digital post-processing.
In addition, Midi In and dual Midi Out (currently mirrored) are available as TRS A sockets.
* The interface is suitable for all Audio Class 2.0 compatible computers and devices and works directly under iOS (tablets and phones), MacOS and compatible Linux systems. To be able to use all features, a driver must be installed under Windows.
In conjunction with Audio Class 2.0 compliant tablet, phone or computer:
The first version of the interface will be available as a DIY kit in PCB sandwich construction. A 3D printed frame nevertheless ensures a robust and closed device that can also be used live without any problems. The kit will be easy to assemble in a very short time without soldering.
The design has already been conceived in such a way that the interface can be modularly expanded to 32 input and 16 output channels in the future by means of an additional circuit board clipped in between. The design also allows subsequent integration into a sheet metal housing to make the device even more robust. Various types of plug-in boards can open up further areas of application in the future, e.g. voltage compatibility with Eurorack, versions with large mono jacks or even higher quality AD converters. The firmware can be updated at a later date and creates additional space for further functions.
For a long time I was looking in vain for a portable audio interface with lots of input channels for small live sessions with several hardware synths and drum machines. Mixing consoles are often far too large and inflexible, offer too few stereo channels and usually have too many unneeded components and functions. In my own live setup, I have been reliably using the combination of iPad and audio interface for years for live mixing, pre-listening and sound optimization of the connected synths. I also run virtual instruments on the iPad. The midi routing between USB and hardware midi can also be configured very flexibly. As I often travel to sessions by public transport, I was always annoyed by the size, weight and extra power supply unit of the audio interface I used previously. Encouraged by a good friend and a lot of encouragement from everyone I told about my idea, I decided to build my own audio interface ... and the adventure began.
The interface presented here is now the first version and I look forward to a lively exchange, your opinions, criticism and suggestions. Depending on the feedback, production can start this summer and the first devices can be delivered in the second half of the year.
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