Zitat:

- has a dual-core DSP56725
- Stereo analogue input
- Stereo digital input
- 8 analogue outputs with analogue volume control
- 10 digital outputs (8 of them carry the signal of the analogue outs before DA conversion)
- 2 I2S expansion ports
- 48kHz, 96 kHz and 192 kHz are all 3 natively supported by the DSP and that sampling frequency is user selectable while configuring the board
- the ability to view a final response graph, overlaid on a target response curve
- the board has over 1s of delay (at 96 kHz) to share between the channels

The board also features headers for keypad with 8 push-buttons, LCD, status leds and IR sensor as well as a USB connector for the control application. Peripheral management is performed by a micro-controller so that the DSP stays fully available for DSP routines.

Also, in order to have the main board operating, you'll need first to provide:
- a power supply (5V and +/- 12V)
- a back-lit LCD display - any color any size provided it's the proper type (2x16)
- 8 push-buttons
- a IR sensor (5V 38kHz) if you intend to use a remote controller, which I recommend.

It's going to be cheap and very good quality.

I hope to make available the hardware and the Windows build in 3 months.

Zitat:Es ist dir nicht erlaubt, Anhänge hochzuladen.

Zitat:It's going to be cheap and very good quality.

Zitat:Ok, so I did some Ebay surfing. Besides these parts I would need the powersupplies (think I already got those) and a cabinet

Mini Universal TV Spy Remote Control For TCL LG NEC JVC | eBay

8 push buttons [Accessory board matrix Keypad keyboard] | eBay

Microtips Technology LCD Display - 2 x 16 - MTC-S16204A - 2 Lines x 16 Character | eBay

Wrobot Digital 38KHz IR Receiver Sensor | eBay

Zitat:Another forum member (qusp) had already asked for external clock supply. I have made the hardware change so that external clock supply is possible now. The software part of this option might come only with the 2nd release - depending on time available until October.

Each analogue IC has its dedicated regulator(s) and voltage rails for OP is supplied by the user (+/- 12V).

Input selection is between following sources:
- Analogue
- SPDIF optical
- SPDIF coax
- I2S

Zitat:One more feature I haven't mentioned so far: There's also onboard an isolated command for external relays intended for turning on and off your amps.

Zitat:Opamps are all on sockets. Swapping for all of them takes 1 minute

The CS3318 is by far the most expensive chip on the board: about USD 29 for a unit at Digikey, still USD 20 if you get 100 of them.
CS3318-CQZ Cirrus Logic Inc | 598-1180-ND | DigiKey
The analogue volume chip has another benefit beside performing volume in the analogue domain. Indeed, it lets you set the nominal output level and hence supply an appropriate signal to your amp. Without the chip, the nominal output level is 1 Vrms.

Here's a summary of what's available in terms of outputs.
Inside the DSP, there are 10 output channels internally.
- All channels 1 to 10 are on SPDIF outputs.
- Channels 1 to 8 are available also on analogue outs.
- There are 2 expansion ports with I2S. They are different but for now it's enough to know that one port can carry up to 6 channels, and the second port can carry up to 12 channels. You can assign to the I2S lines any channel 1 -> 10.

Zitat:Hi gents!

I have now approximate pricing information for the DSP board including software. To be confirmed!

- between USD 260 and USD 290 for the board without analogue volume. [SIZE=2](= 208 - 232 Euro)
- between USD 280 and USD 330 for the board with analogue volume (CS3318).[/SIZE] (= 224 - 264 Euro)

Shipping comes on top in all cases. For UE buyers, add 15% VAT.

I'll order a production run soon so that I can start delivering in October if there's no major shortage of chips.

bAD kARMA schrieb:Nun ja, wenn ich bedenke, dass ein 8-Kanal DAC wie ein Buffalo III schon fast 400 Euro kostet, dann könnte das (je nach Chip) immer noch ein Schnäppchen sein.