freeDSP diyAudio forum
freeDSP GitHub repository
freeDSP design guidelines
SigmaStudio documentation
SigmaStudio forum
Graphic & parametric EQs
Mixing
Phase shifting
Dynamics processing
IIR / FIR filtering
Low-level DSP functions
Real time tuning
...
Digital crossovers
Digital room correction
Subwoofer integration
Musical effect units
System equalization
Delay compensation
Bass enhancement
...
Select your freeDSP main board from the overview table below. Additionally, you will need a programmer. We recommend building the freeUSBi programmer for real time tuning of your programms. Download the Gerber files and manufacture the board. You have to order all necessary parts yourself. We do not offer centralized buying at the moment!
You can find the part list and the assembly print for soldering in the table below (e.g., in the corresponding getting started guides). Some soldering experience is required for SMD components. Hopefully, there will be preassamled freeDSP kits again in the future. :-)
The graphical development environment SigmaStudio can be used for easy programming. It can be downloaded for free (account needed) at the SigmaStudio website. Please have a look at the getting started guides to get your freeDSP up and running with SigmaStudio. For further questions please refer to the SigmaStudio documentation and forum.
... enjoy!
Main boards |
|||||||||
| freeDSP | In | Out | Status | Source | Parts | Documentation | Compatibility | Notes | Cost |
|---|---|---|---|---|---|---|---|---|---|
CLASSIC |
2 x RCA |
4 x RCA |
Ready |
Eagle, Arduino | Reichelt, Digikey | Getting started | Only freeDSPx AES/SPDIF IN | ADAU1701 | |
| CLASSIC SMD B | 2 x RCA |
4 x RCA |
Ready |
KiCad | Digikey | Getting started | 4 I²S expansion connectors | ADAU1701 | 15€ - 80€ buy here |
| CLASSIC SMD A/B | 2 x RCA |
4 x RCA |
Ready |
KiCad | Project website | 1 I²S connector, selectable boot EEPROMs |
ADAU1701 | buy @ SeedStudio | |
CLASSIC SMD A/B plus-II |
2 x RCA |
6 x RCA |
Ready |
KiCad | Project website | selectable boot EEPROMs, integrated freeUSBi |
ADAU1701 | SMT and boards @ JLPCB | |
| ALLinONE | 2 x RCA, S/PDIF |
AMP 4x12W, S/PDIF |
Ready |
KiCad | Mouser | Getting started | 1 I²S expansion connector | ADAU1701 | |
| PiDSP | RasPi In, S/PDIF |
RasPi Out, S/PDIF |
Beta-Ready |
Altium | BOM | Getting started | 3 I²S expansion connectors | ADAU1452 | |
| INSANITY | 8 x Unbal
1 x S/PDIF |
8 x Unbal
1 x S/PDIF |
Beta-Ready |
KiCad | 3 I²S expansion connectors | ADAU1452 | |||
| AURORA |
USB Audio Class2 8ch IO 8 x Analog Bal IO S/P-DIF IO ADAT IO Wordclock IO WiFi+BT control |
Ready |
KiCad | Getting started | 1 I²S expansion connectors | ADAU1452, XMOSXE216, ESP32 |
KICK- STARTER | ||
| INFINITAS |
32ch USB audio interface
(expansion boards needed)Wordclock IO
|
Ready |
KiCad | DigiKey | Getting started Application note 32ch USB DSP |
4 I²S expansion connectors | DSP ADAU1452, XMOS XE216, FPGA MachXO2, buy @ tindie |
||
| nanoDSP | 2 x Analog |
4 x Analog |
Ready |
Not available | Getting started | No expansion header | ADAU1701 | 60 € + TH parts | |
| CLASSIC SMD A | 2 x Analog |
4 x Analog |
Ready |
KiCad | freeDSPx |
ADAU1701 | |||
| CLASSIC BAL A | 2 x Bal |
4 x Bal |
KiCad | 1 I²S expansion connector | ADAU1701 | ||||
Programmer |
|||||||||
| Name | In | Out | Status | Source | Parts | Documentation | Compatibility | Notes | Cost |
freeUSBi + |
USB | - | Ready |
KiCad, Drivers | Reichelt, Digikey | Getting started | All freeDSP boards | 25€ buy here | |
SigmaLink USBi |
USB | - | Ready |
KiCad | - | Getting started | All freeDSP boards | $28.50 + shipping buy here | |
IO expansions |
|||||||||
| freeDSPx | In | Out | Status | Source | Parts | Documentation | Compatibility | Notes | Cost |
| AnalogIO x8 | 8 x Analog IO +6dBu |
Ready |
KiCAD | Digikey | Getting started | I²S expansion connector | 15$ buy @ tindie | ||
AES/SPDIF IN |
1 x AES/EBU 1 x S/PDIF |
- | Ready |
Eagle | Excel | Getting started | Only freeDSP CLASSIC | ||
| UNBAL OUT x8 | - | Tested |
KiCad | Only freeDSP CLASSIC SMD A | |||||
| UNBAL IN x8 | 8 x Analog |
- | Tested |
KiCad | Only freeDSP CLASSIC SMD A | ||||
STANDARD CONNECTOR ADAPTER |
4 x I²S expansion connectors for in and out | KiCad | Reichelt | Getting started | Adapter of the old freeDSP CLASSIC pin header to the new freeDSP I²S connector. | ||||
| AMP x2 | I²S expansion connector | 2 x Terminal Block | Ready |
KiCad | Mouser | Getting Started | I²S expansion connector | 0.1% THD @12W 4Ω | |
| AMP x4 | I²S expansion connector | 4 x Terminal Block | Ready |
KiCad | Mouser | Getting Started | I²S expansion connector, two AMPs can be used on one I²S TDM 8 output | 0.1% THD @12W 4Ω | |
| USB x2 | USB | I²S | Tested |
Source | Getting Started (only German) |
PSoC5LP | Cypress devboard 10 € | ||
| SPDIF IO | 1 x S/PDIF |
1 x S/PDIF |
Help wanted |
KiCad | I²S expansion connector | ||||
| ADAT IO x4 | 4 x ADAT |
4 x ADAT |
Prep |
KiCad, VHDL | I²S expansion connector | ||||
| UNBAL IO x2 | 2 x RCA |
2 x RCA |
Help wanted |
I²S expansion connector | Maybe 4 Out | ||||
| BAL OUT x16 | - | 16 x Analog
| Prep |
KiCad | I²S expansion connector | ||||
| PHONES AMP | - | 1 x Jack |
Prep |
KiCad | I²S expansion connector | ||||
| HDMI IO | < 4 x HDMI | 1 x HDMI | Help wanted |
I²S expansion connector | |||||
| DOLBY/DTS/AC3 IO | 1 x Toslink | 1 x Toslink | Help wanted |
I²S expansion connector | |||||
The freeDSP is so cool. :-)
If you're having questions regarding programing with SigmaStudio, please go to the Analog Devices support forum.
If you're having questions regarding the freeDSP board:
If you want to join the freeDSP team or want to improve the documentation or the website, drop us a line in the contact form. You can also propose your applications, extensions, ... to be added to this website. :-) GitHub is used for file exchange. Most freeDSP PCBs will be designed using KiCad. Some guidelines were defined to make future freeDSP development and extensions as compatible as possible. These layout guidelines can be found in the freeDSP-Wiki.
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