in a german forum a member developed a 8 channel dsp. It has more functionality than a MiniDSP 10x10HD, but costs only a friction of it.
Some of the advantages over the MiniDSP: 8 Channel USB Audio, FIR Filters, BT/Wlan remote control, price, open source...
Room compensation / system equalization
Digital crossovers in active loudspeaker concepts
Multiband dynamics processing
Delay compensation / phase shift
Stereo image widening
I´m quoting the devoloper here:
"freeDSP-aurora is a one board DSP solution. It all started with the development of a DSP powered subwoofer amplifier. Once the prototype of this amplifier was presented on the German forum diy-hifi.forum.de a fruitful discussion about additional features and ideas started. After two years of development freeDSP-aurora is the distillation of the best ideas.
So here are the features of the board:
Analog Devices ADAU1452, 294.912 MHz, 32-bit SigmaDSP, 6144 SIMD instructions per sample @ 48kHz fs, 40kWords of data RAM, 800ms digital audio delay pool @ 48kHz fs, eight stereo ASRCs with 139dB DNR
XMOS XE216-512-TQ128 for multichannel bidirectional audio streaming
ESP32 for WiFi or Bluetooth control
AKM AK4458 32bit-DAC
AKM AK5558 32bit-ADC
Supporting sample rates between 44.1kHz and 192kHz
8 analog balanced input channels, +6dBu
8 analog balanced output channels, +6dBu
S/P-DIF input and output
ADAT input and output
Wordclock input and output
Support for display, rotary encoder, volume potentiometer, temperature sensor, PWM controlled fan, IR sensor
One freeDSP expansion header
USB Audio Class 2 Bidirectional streaming with 8 channels in and 8 channels out, full-duplex. Works with ASIO driver under Windows 10 and driverless under macOS and Linux.
Board dimensions: 100mm x 100mm
To make using as easy as possible I wrote my own app that controls the DSP via Bluetooth. The app runs on macOS, Windows or iOS. Thanks to the ESP32 framework Wifi instead of Bluetooth is an option.
The features of the DSP depend on the DSP firmware. Therefore, I have made a first DSP firmware with the following features per channel.
High pass up to fourth order (Bessel, Butterworth, Linkwitz-Riley)
10 parametric EQs
Low pass up to fourth order (Bessel, Butterworth, Linkwitz-Riley)
Frequency depending phase shift (allpass)
It supports 8 channels in and out.
This feature list is only a first step. It can be extended in the future, e.g. FIR-Filters are already on the ToDo list.
Like any other freeDSP the project is licensed under an open source license. Thus, everybody is invited to modify or contribute to this project. You can even download everything and build as many freeDSPs as you want. "
You can already test out the software: https://github.com/freeDSP/freeDSP-aurora/releases
There is a kickstarter campaign running, but i cant link to it directly. (forum rules)
If you want more detailed infos or how to acquire it, follow these links:
german (use translator):