Sound not working?

Question

linux

There is an ICH7 sound card and AMD Radeon 4xxx with sound via HDMI.
In the kernel, I modularly compiled all possible codecs and device drivers.
In alsamixer "HDA Intel dont have any controls", same with Radeon.
As for ICH7, that snd_hda_intel was attached to the Radeon, I
tried to add to the hornbeam that both radeon.audio=1 and radeon.audio=0, nothing helps.
How to be?
Kernel 4.0.2 Gentoo.

00:1b.0 Audio device: Intel Corporation NM10/ICH7 Family High Definition Audio Controller (rev 01)
  Subsystem: ASRock Incorporation Device 3662
  Kernel driver in use: snd_hda_intel

04:00.1 Audio device: Advanced Micro Devices, Inc. [AMD/ATI] RV710/730 HDMI Audio [Radeon HD 4000 series]
  Subsystem: Hightech Information System Ltd. Device aa38
  Kernel driver in use: snd_hda_intel

Kernel config

Answer 1

build alsamixer, run it, select master channel and press M (Mute)
By default, alsa mutes channels and they must be turned on.