[SOLVED] No Sound from Firefox to Toslink / SPDIF OUT to external DAC

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loewe19
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[SOLVED] No Sound from Firefox to Toslink / SPDIF OUT to external DAC

Post by loewe19 »

Hi @all,
I have an Odroid C4 with activated Hifishield + running the actual Ubuntu Mate Desktop.
The C4 is connected via HDMI to a 55" LCD TV.
While analog out on the RCA Sockets works perfectly and crystal clear on my home stereo setup, I do not get any sound from Firefox to my external DAC, which is connected via Toslink / SPDIF optical cable to the Hifishield +.

What is strange: The speaker Test from Ubuntu Sound Mixer Tool works on the ext. DAC !
My external DAC is connecting @48kHz sample rate, and the test sounds are cleary audible.

So, I suppose an internal routing problem from the PCM Data Stream esp. from Firefox to Toslink / SPDIF OUT.

Alsamixer also works, with two configurable Cards, ODROID-HDMI and ODROID-HIFI (see below)

I tried all possibilities on both cards, but still no sound from Firefox to Toslink and ext. DAC.
Does anybody know how to fix this ? Any help would be greatly appreciated.

THX in Advance , Thomas

------------------------------------------------------------------------------------------------------------------------------------------------
Appendix- Output from aplay -l:
**** Liste der Hardware-Geräte (PLAYBACK) ****
Karte 0: ODROIDHDMI [ODROID-HDMI], Gerät 0: SPDIF-dit-hifi dit-hifi-0 []
Sub-Geräte: 1/1
Sub-Gerät #0: subdevice #0
Karte 1: ODROIDHIFI [ODROID-HIFI], Gerät 0: TDM-B-pcm5102a-hifi multicodec-0 []
Sub-Geräte: 1/1
Sub-Gerät #0: subdevice #0

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odroid
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Re: No Sound from Firefox to Toslink / SPDIF OUT to external DAC

Post by odroid »

Did you already configure the Sound settings something like this to activate the SPDIF(Toslink) output on the HiFi-Shield?
Applications → Sound & Video → Sound → Hardware Tab & Output Tab select “ODROID-HDMI”
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loewe19 (Tue Jul 13, 2021 4:25 pm)

loewe19
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Re: No Sound from Firefox to Toslink / SPDIF OUT to external DAC

Post by loewe19 »

Hello odroid,

exactly this DID the trick !! I did not know I have to activate BOTH on the Hardware AND Output Tab !
Thank You very much for your fast and competent support :-) !! You are my hero !

While sound quality is already excellent on the RCA output, I now can take further advantage of my DAC Upsampler (Behringer Ultramatch Pro), which is an integral component of my setup .

BTW: you did an excellent Job in engineering and manufacturing the HIFISHIELD+ !
I am 15+ years active in digital audio scene, I NEVER thought such an excellent audio quality would be possible with such a very reasonable priced sound card :-)

THX again and kind regards,
Thomas

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Re: No Sound from Firefox to Toslink / SPDIF OUT to external DAC

Post by odroid »

Happy to hear that positive feedback from a professional digital audio engineer. :D
Thanks,

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