I had this happen to me after a power failure and subsequent reboot. For some 
reason had to go into alsa mixer and turn the channels back up....Mine was a 
delta 1010LT.
-----Original Message-----
From: rivendell-dev-boun...@lists.rivendellaudio.org 
<rivendell-dev-boun...@lists.rivendellaudio.org> On Behalf Of Lorne Tyndale
Sent: Monday, December 09, 2019 3:20 PM
To: Rob Landry <41001...@interpring.com>; Rivendell-Dev 
<rivendell-dev@lists.rivendellaudio.org>
Subject: Re: [RDD] alsa-firmware problem

Rob,

2 things with M-Audio cards.

If the M-Audio is an M-Audio Delta 1010 with the external breakout box, pull 
the breakout box apart.  There is a 470uF 63V capacitor (or there might be 2 of 
them in there, I can't recall) which goes bad.  When you take the top of the 
unit off the breakout box, the capacitor(s) are in the upper left corner, just 
to the right of where the power cable plugs in.  Replace the capacitor(s) and 
chances are you'll be good to go.

The second thing with M-Audio cards, I've had situations where the Delta's have 
occasionally ended up with channels muted or turned down. 
I also had one card which had a bug where it would appear that it was turned 
up, but didn't un-mute until running the audio for the channels in question all 
the way down then back up and toggling the mute option. 
The graphical Envy24 has been a good friend to fixing this a number of times.

Just some ideas.

Lorne Tyndale


> OK, so I've got RD 2.19.3 running via the standard CentOS 7 install on 
> a machine I am maintaining as a backup.
> 
> The M-Audio sound card it's been running appears to have become 
> faulty; it no longer generates any output.
> 
> So, I want to replace it with an Echo MIA Midi card I've had on the 
> shelf, but that card requires the alsa-firmware package, which CentOS 
> won't let me install, claiming that it conflicts with hpklinux.
> 
> Now, I don't need hpklinux because this machine doesn't have an 
> AudioScience card, but if I try to remove it, it threatens to remove 
> Rivendell too.
> 
> Does anyone know of an easier fix than recompiling Rivendell from source?
> 
> 
> Rob
> 
> --
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