Hi, interested in making a digital volume control with raspberry, screen, coder button, and remote.
I need toslink input, volume control, toslink output.
I plan to use a volume control algorithm wich i already have in C++ and maybe after that (later) an upsampling.
my question is :
should I use digi+ I/O and make processing by the raspberry or use Hifiberry Dac+DSP
where can I find informations after buying boards
thanks
In theory this could be done with the Digi+ I/OP and the DAC+ DSP. I haven't seen somebody doing this before. Before even thinking about the Digi+ I/O have a look at the limitations:
https://www.hifiberry.com/digis
ok, read a little more about dac+dsp and it seems to be best solution.
- is there a technical datasheet of this? or will it come with the board?
- is it possible when using this standalone to add a hardware volume knob (handled by a script in dsp)?
> is there a technical datasheet of this? or will it come with the board?
https://www.hifiberry.com/docs/data-sheets/datasheet-dac-dsp/
> is it possible when using this standalone to add a hardware volume knob (handled by a script in dsp)?
Theroetically yes. But implementing it can be very frustrating. I remember one user here in the forum tried it, but I'm not sure if he was successful.
In general, I recommend to have a look at SigmaStudio first before starting with this project. It has a steep learning curve and can be quite frustrating - especially if you don't have a lot of experience with DSP programming.
thanks, what's the dsp model to select in sigmastudio
The DSP is an ADAU1452. However, I do not recommend to start a project from scratch, but use one of the programs that we already created. Setting up a new project can become also very frustrating ;-)
https://github.com/hifiberry/hifiberry-dsp/tree/master/sample_files/dspproj