FPeter Posted June 26, 2016 Share Posted June 26, 2016 Hi All! Legacy kernel says: "Enabled audio devices: analog, 8 channel HDMI, spdif and I2S (if wired and enabled in HW configuration)" But there is no multi channel device listed in aplay -L , like surround51, surround71, etc. With "speaker-test -D default:sunxisndhdmi -c 6 -t wav", We got a downmixed stereo result. Receiver device is a BEM-182 Broadcast Monitor on its HDMI input - only 2 VU-meter band appears. Other test setup is the same receiver in SDI input mode with an HDMI to SDI converter. Specs of this adapter declares that it supports 8 channel, and this time 8 VU-meter band appears on the monitor so device is ready to receive multi-channel audio, but the 6-8CH audio transmission is still downmixed to stereo... Are there anything that should be switched manually / reconfigured on the BPi transmitter side? Or is it an incompatibility situation? Best regards, Peter Link to comment Share on other sites More sharing options...
FPeter Posted July 1, 2016 Author Share Posted July 1, 2016 Nobody using A20 as multi channel / ecasound DSP source? We found that HDMI audio EDID information is being ignored by default due to hdmi.audio=EDID:0 in boot.cmd/scr, so we edited cmd to 1 and recompiled it to scr. Now the boot option changed, but result is still the same: there is no multi channel device in aplay -L list, and multi channel source is being downmixed and sent as stereo... dmesg | grep "Kernel command line" [ 0.000000] Kernel command line: console=ttyS0,115200 console=tty1 root=/dev/mmcblk0p1 rootwait rootfstype=ext4 cgroup_enable=memory swapaccount=1 sunxi_ve_mem_reserve=0 sunxi_g2d_mem_reserve=0 sunxi_no_mali_mem_reserve sunxi_fb_mem_reserve=16 hdmi.audio=EDID:1 disp.screen0_output_mode=1920x1080p60 panic=10 consoleblank=0 enforcing=0 loglevel=7 Any hints? A also tried to convert script.bin to fex, but did not find any multi channel HDMI related line in it... Link to comment Share on other sites More sharing options...
Igor Posted July 2, 2016 Share Posted July 2, 2016 Try asking patch author: https://github.com/igorpecovnik/lib/blob/master/patch/kernel/sun7i-default/0029-HDMI-8ch-and-alsa-fix-2.0.patch @Nikkov might know more about those audio issues. Link to comment Share on other sites More sharing options...
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