Bamyasi
Senior Member
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- Feb 19, 2019
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I have followed the suggestions of @Poultrygeist and @Bamyasi. Here is what happens on my system.
Scenario 1 playing UHD track
AMHD app playing and shows Track Quality 24/192 Device Capability 24/192 Currently Playing at 24/192
Audio extractor is on 2CH
External DAC (fed from the Toslink out of the extractor) shows a sampling rate of 48KHz.
Scenario 2 playing HD track
AMHD app playing and shows Track Quality 16/44.1 Device Capability 24/192 Currently Playing at 16/44.1
Audio extractor is on 2CH
External DAC (fed from the Toslink out of the extractor) shows a sampling rate of 48KHz.
Scenario 3 playing UHD
AMHD app playing and shows Track Quality 24/192 Device Capability 16/192 Currently Playing at 16/192
Audio extractor is on 5.1CH
External DAC (fed from the Toslink out of the extractor) shows a sampling rate of 192KHz.
Scenario 4 playing HD track
AMHD app playing and shows Track Quality 16/44.1 Device Capability 16/192 Currently Playing at 16/44.1
Audio extractor is on 5.1CH
External DAC (fed from the Toslink out of the extractor) shows a sampling rate of 192KHz.
When extractor is on 2CH, the firestick detects a device capability of 24/192 but only feeds the DAC a sampling rate of 48KHz. Downsampling a UHD track from 192 and upsampling an HD track from 44.1
When extractor is on 5.1CH, the firestick detects a device capability of 16/192 but feeds the DAC a constant sampling rate of 192 KHz and I assume at only 16 bit.
Can anyone help and shed some light on what could possibly be happening here. Why does the device capability bit rate change from 24 to 16 when I switch from 2CH to 5.1CH. The audio extractor toslink out does not match what the playing at sample rate reported by the AMHD app with the exception when it is set to 5.1 and playing a 24/192 track. However in that instance the bitrate is probably 16 instead of 24. My DAC display does not indicate the bit rate.
Thanks.
In 2CH mode it is the extractor which downmixes audio from what is received on its HDMI input to 2CH 24/48 fixed rate on the HDMI output. AMHD app has nothing to do with it and is not aware, hence still shows playing at full capability, as this is the extractor's HDMI input capability.
My Firestick would often hang and crash if I try switching between 2CH and 5.1CH on the extractor while AMHD app was running on the stick. Sometimes it would then require a cold reset for both to re-negotiate EDID properly. Try it.
What is your extractor's HDMI output connected to? Is it a TV or AVR?
Have you tried setting Surround Sound to Stereo in the Audio settings on the Firestick?