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Hi Kevin, |
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Hello, I'm not an experienced linux user, but I wanted to try and use a Pi4b to run jamulus as a portable alternative to my laptop. At the moment i'm struggling to even get my Presonus Audiobox USB 96 to even get connected to the Pi! Any library i need to install? libmtp perhaps? I'd love to hear any ideas :) Cheers, |
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I am seeing this same issue, but am an experienced Linux user, but not an
audio expert. I would be happy to help diagnose, maybe discuss in the
Slack channel?
Thanks,
Carlos
…On Thu, Jan 7, 2021 at 10:08 AM razze2006 ***@***.***> wrote:
Hello,
I'm not an experienced linux user, but I wanted to try and use a Pi4b to
run jamulus as a portable alternative to my laptop. At the moment i'm
struggling to even get my Presonus Audiobox USB 96 to even get connected to
the Pi!
I'm getting an endless cycle of the device being recognised and then found
not to be an MTP device and subsequentluy disconnected.
Any library i need to install? libmtp perhaps? I'd love to hear any ideas
:)
Cheers,
Marco
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The slack team I mentioned can be joined by following this link:
https://join.slack.com/t/jacktripcollaboration/shared_invite/zt-g3iz2nkh-d9tQeOZItS30SZUELaXf1A
The #jambox channel is where relevant discussion would be found.
Carlos
…On Thu, Jan 7, 2021 at 2:24 PM razze2006 ***@***.***> wrote:
I'll set up slack and try. Should there be a slack workspace i should be
able to join with the email I use to log into github? I'm in the uk, so
I'll have to wait until tomorrow to do it
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Hello |
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Thank you so much for your answer in the middle of the night :-) |
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Which is correct image version? |
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Hi, we tested the jambox today with 4 raspberries to connect. But we had problems with Jamulus and with sonobus.
Maybe anybody has an idea? Many thanks :-) |
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@Ghost6772 Settings changes should save. If they aren't saving, try a different micro SD card. Another test: write something to a file, and make sure you can read it after a reboot. |
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I've had a Pi 4B kit for over a week and was struggling to get it to drive an old DVI monitor whose power supply I repaired just for this purpose and which worked up to a month ago with my laptop's HDMI port. No success there so I plugged it into the replacement monitor, installed Jamulus on Raspbian and tried to get it going. No luck sorting out Jack. So I finally read through the JamBox instructions and finally succeeded in flashing an image onto the 4GB card I pulled from my wife's defunct Kobo Reader. Fired it up and voila! JamBox sorted out the first audio interface I tried. More on that later. And noVNC/urlrelay works a charm on my pc but not my old iPad 2 nor the phones (screen too small). I imagine the iPad's browser does not support JavaScript. Thanks, Kevin! |
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Thank you, Kevin, I hadn't come across this super-useful tidbit anywhere,
and I have been studying up on amixer, because our group has a need to
control mic gain and/or volume, and I can imagine putting into some handy
scripts with a gui icon. I am going to work on this, so let me know if you
beat me to it. ;-)
Carlos
…On Tue, Feb 2, 2021 at 6:28 PM Kevin Doren ***@***.***> wrote:
@ve3meo <https://github.com/ve3meo> @CAguayo <https://github.com/CAguayo>
Even the cheapest USB Audio Interfaces can have internal controls and
switches that might be useful (sometimes a bewildering array of them)
They're not necessarily exposed through any GUI, but you might be able to
get to them via the "amixer" command.
For example, it might be possible to disable AGC. Here's a cheap one
(Sabrent I think, card 1 in this case) that has AGC:
# look for a control with "Auto" in the name
***@***.***:~ $ amixer -c 1 | grep Auto
Simple mixer control 'Auto Gain Control',0
# get the value of mixer control "Auto Gain Control
***@***.***:~ $ amixer -c 1 cget iface=MIXER,name='Auto Gain Control'
numid=9,iface=MIXER,name='Auto Gain Control'
; type=BOOLEAN,access=rw------,values=1
: values=on
# set "Auto Gain Control" off
***@***.***:~ $ amixer -c 1 cset iface=MIXER,name='Auto Gain Control' 0
numid=9,iface=MIXER,name='Auto Gain Control'
; type=BOOLEAN,access=rw------,values=1
: values=off
If you find the magic command that disables AGC, you could put it in
/etc/jackdrc.conf (that file is sourced so any commands in it are
executed). Then it will get executed whenever Jamulus starts or jack is
restarted.
The cheap audio interfaces typically have poor power supply filtering, and
the Pi has noisy power (Pi4 is better than Pi3). Trashy power + poor
filtering + mic preamp = noise problems.
Glad you found a use for your T41; I still have a couple of T40's lying
around, they were great laptops for their day.
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