HiFiBerry amp+ / IqAudio DigiAmp+, extra features, confused!

[RaspberryQuiche]

My current amp is falling apart and I want to replace it with an amp that fits on the Raspberry Pi. I use my Pi to play music and videos from internet and my NAS.

So I hesitate between the HiFiBerry Amp+ and the IQAudio DigiAmp+. But since I am new to this world of DIY HiFi, I have some questions!

1- My Pi is on all the time. I think that the DigiAmp+ has a mute option and the HiFiBerry doesn't. How much current would the Pi and the amp draw when muted? Same as not muted? I don't mind having a Pi drawing 2-3 watts all the time, but 35 watts is quite more.

2- I know I can use a physical volume control on the DigiAmp+, which is a very good reason for me to got this route. But I saw another post here saying that the guy has a volume knob on his HiFiBerry. So it IS possible on the HiFiBerry? If so, is it something I can think of doing (as a newbie)? Is it harder to achieve than on the DigiAmp+ ?

3- I know that in 2016, we can easily listen to radio on the internet, but I still want to use a hardware FM receiver. Can I do it with the Raspberry Pi and the HiFiBerry/DigiAmp+? Then can I use a physical knob to control the frequencies? How about a physical switch to toggle between FM radio / Raspberry Pi audio (music and videos)?

4- Then maybe I would add a small LCD screen to display the volume, radio station, etc.



So first I have to make a choice between the two amps/DACs. At least I would have a working little amp. Then I don't know where to start in order to add features to my setup.

[RaspberryQuiche]

up