Re: Don't ever bother with bridging JACK with ALSA or Pulseaudio.

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I just wanted to share a pair of speakers between Raspberry Pi 3 B+ and my
workstation computer.
I also wanted to switch between a pair of speakers and headphones on my
workstation computer with a keyboard shortcut.
It is far more complex than it can be.
That's why I am going to sell Raspberry Pi 3 B+ and its I2S DAC amp and buy
a USB DAC amp.
Soon, I will eliminate JACK and use only ALSA.

On Fri, Sep 13, 2019 at 2:16 AM Chris Caudle <[email protected]> wrote:

> On Thu, September 12, 2019 8:05 am, crocket wrote:
> > I've spent months on perfecting the bridge between JACK and ALSA.
>
> I think you have created the most complex monitor controller ever.  This
> is that system that has S/PDIF from the motherboard audio to digital input
> on a USB connected interface that you described earlier?
>
> -----------------------------
> --> is a connection that doesn't cross the boundary of a computer.
> ==> is a connection that occurs between two computers.
>
> Anything that doesn't cross ==> occurs on my desktop computer. Anything
> that happens after ==> occurs on Raspberry Pi 3 B+.
> netjack1 runs on my desktop computer. Ethernet cable is the only cable
> that connects two machines.
>
> 1. ALSA dmix --> SPDIF out of Realtek ALC887 onboard soundcard --> SPDIF
> In of X-Fi HD USB --(alsa_in or zita-a2j)--> netjack1 ==(ethernet
> cable)==> ALSA jack backend --> I2S Amplifier(HiFiBerry Amp2) --> Speakers
>
> 2. netjack1 --(alsa_out or zita-j2a)--> headphone jack of X-Fi HD USB on
> my desktop computer --> headphones
>
> -----------------------------
>
> Is this being used for music production, or just listening to audio files?
> PulseAudio can do something similar in a self-contained fashion, at the
> expense of higher latency and the occasional dropped sample.  And of
> course the old fashioned way to do it would be with an analog monitor
> controller or small mixer.  The more modern audio production focused way
> would be to use Dante or similar if you really want network connectivity,
> or the ability to add and remove devices, have large distance separation,
> etc.
>
> My recollection is that the questions you posed were somewhat isolated,
> and mostly how to accomplish various specific tasks with jackd or alsa.
> It may have been better to start with a more general description of what
> you were trying to accomplish and ask about the best way to get to that
> result, because I can't imagine anyone recommending that convoluted signal
> chain just for listening to audio from your desktop and a separate
> computer (RPi in your case) at the same time.  Using an on board audio
> interface just to send audio over S/PDIF to a USB interface to drive
> headphones seems pretty bizarre, I never could make sense of what you were
> trying to accomplish with that rather than just sending audio to the USB
> interface to start with.
>
>
> --
> Chris Caudle
>
>
>
>
> _______________________________________________
> Jack-Devel mailing list
> [email protected]
> http://lists.jackaudio.org/listinfo.cgi/jack-devel-jackaudio.org
>

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<div dir=3D"ltr">I just wanted to share a pair of speakers between Raspberr=
y Pi 3 B+ and my workstation computer.<div>I also wanted to switch between =
a pair of speakers and headphones on my workstation computer with a keyboar=
d shortcut.</div><div>It is far more complex than it can be.</div><div>That=
&#39;s why I am going to sell Raspberry Pi 3 B+ and its I2S DAC amp and buy=
 a USB DAC amp.</div><div>Soon, I will eliminate JACK and use only ALSA.</d=
iv></div><br><div class=3D"gmail_quote"><div dir=3D"ltr" class=3D"gmail_att=
r">On Fri, Sep 13, 2019 at 2:16 AM Chris Caudle &lt;<a href=3D"mailto:chris=
@chriscaudle.org">[email protected]</a>&gt; wrote:<br></div><blockquote=
 class=3D"gmail_quote" style=3D"margin:0px 0px 0px 0.8ex;border-left:1px so=
lid rgb(204,204,204);padding-left:1ex">On Thu, September 12, 2019 8:05 am, =
crocket wrote:<br>
&gt; I&#39;ve spent months on perfecting the bridge between JACK and ALSA.<=
br>
<br>
I think you have created the most complex monitor controller ever.=C2=A0 Th=
is<br>
is that system that has S/PDIF from the motherboard audio to digital input<=
br>
on a USB connected interface that you described earlier?<br>
<br>
-----------------------------<br>
--&gt; is a connection that doesn&#39;t cross the boundary of a computer.<b=
r>
=3D=3D&gt; is a connection that occurs between two computers.<br>
<br>
Anything that doesn&#39;t cross =3D=3D&gt; occurs on my desktop computer. A=
nything<br>
that happens after =3D=3D&gt; occurs on Raspberry Pi 3 B+.<br>
netjack1 runs on my desktop computer. Ethernet cable is the only cable<br>
that connects two machines.<br>
<br>
1. ALSA dmix --&gt; SPDIF out of Realtek ALC887 onboard soundcard --&gt; SP=
DIF<br>
In of X-Fi HD USB --(alsa_in or zita-a2j)--&gt; netjack1 =3D=3D(ethernet<br=
>
cable)=3D=3D&gt; ALSA jack backend --&gt; I2S Amplifier(HiFiBerry Amp2) --&=
gt; Speakers<br>
<br>
2. netjack1 --(alsa_out or zita-j2a)--&gt; headphone jack of X-Fi HD USB on=
<br>
my desktop computer --&gt; headphones<br>
<br>
-----------------------------<br>
<br>
Is this being used for music production, or just listening to audio files?<=
br>
PulseAudio can do something similar in a self-contained fashion, at the<br>
expense of higher latency and the occasional dropped sample.=C2=A0 And of<b=
r>
course the old fashioned way to do it would be with an analog monitor<br>
controller or small mixer.=C2=A0 The more modern audio production focused w=
ay<br>
would be to use Dante or similar if you really want network connectivity,<b=
r>
or the ability to add and remove devices, have large distance separation,<b=
r>
etc.<br>
<br>
My recollection is that the questions you posed were somewhat isolated,<br>
and mostly how to accomplish various specific tasks with jackd or alsa. <br=
>
It may have been better to start with a more general description of what<br=
>
you were trying to accomplish and ask about the best way to get to that<br>
result, because I can&#39;t imagine anyone recommending that convoluted sig=
nal<br>
chain just for listening to audio from your desktop and a separate<br>
computer (RPi in your case) at the same time.=C2=A0 Using an on board audio=
<br>
interface just to send audio over S/PDIF to a USB interface to drive<br>
headphones seems pretty bizarre, I never could make sense of what you were<=
br>
trying to accomplish with that rather than just sending audio to the USB<br=
>
interface to start with.<br>
<br>
<br>
-- <br>
Chris Caudle<br>
<br>
<br>
<br>
<br>
_______________________________________________<br>
Jack-Devel mailing list<br>
<a href=3D"mailto:[email protected]" target=3D"_blank">Jack-De=
[email protected]</a><br>
<a href=3D"http://lists.jackaudio.org/listinfo.cgi/jack-devel-jackaudio.org=
" rel=3D"noreferrer" target=3D"_blank">http://lists.jackaudio.org/listinfo.=
cgi/jack-devel-jackaudio.org</a><br>
</blockquote></div>

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