Re: [LAU] using Jack an interface to ecasound

I booted my LiveCD and saw that the dpkg output there is just the same as
for my regular system (on solid-state drive). I'm glad to know that I have
jack1 and not jack2, though I'm still not really sure I understand
completely, since the jack process I get is named jackdbus. For now, I
stopped using the jack_control shell script and am just using qjackctl to
bring jack up, and still, the process name is jackdbus. I thought jackdbus
was jack2...

Also, after considering your input on my password situation, I finally
realized that in Linux there's not a separate admin user name, and I
started the root terminal and was able to remember/specify the correct root
password. So that problem is solved.

The most interesting thing is my mistaken idea that the low-pass filter was
attenuating a lot. I think I have been misunderstanding the frequency
content of those low notes on a piano. I was thinking for example the low
A is a more or less pure 27.5hz, but now I think I see, duh, there are lots
of resonances that you hear, that are higher frequencies. My 60hz low
pass filter gets rid of those and sends them to the mid/high speaker, so
all that is left for the big woofer is the lowest frequency content. That
is a kind of strange sound; divorced from its resonances, the piano key
sounds weird, and probably due to my woofers needing equalization below
50hz or so, it's not as loud. Have I got this right??

If so, I'm thinking, everything is actually working correctly!! Next
challenge: to figure out how to add some equalization via ecasound (or
other way you guys might suggest) to get good response out of my woofers,
all the way down into the 20-30hz range. That should finally make my piano
sound more like a real grand piano, I think.
Thanks!!
John

On Sat, Jan 21, 2017 at 1:10 AM, Ralf Mardorf <ralf.mardorf@email-addr-hidden-dsl.net>
wrote:

> On Sat, 21 Jan 2017 00:41:23 +0100, john gibby <johnalan.gibby@email-addr-hidden>
> wrote:
>
>> Ralf, here is the output from dpkg:
>> Audio Connection Kit (default server package)
>> ii jackd1 2:0.124.2~20151211-2~xenial1 amd64 JACK
>> ii libjack-dev 2:0.124.2~20151211-2~xenial1 amd64 JACK
>> Audio Connection Kit (development files)
>>
>
> Now we _know_ you are using jack1 and _not_ jack2.
> Did you compile software?
>
> I am using buffer size 128, N=3, 48000hz.
>>
>
> This shouldn't cause too much latency.
>
> By the way, I'm embarrassed to admit that I really have forgotten my admin
>> password
>>
>
> Boot a live media. Since modern Linux usually use systemd, you not
> necessarily need to chroot, alternatively you could use a systemd-nspawn
> container.
>
> Mount the root partition of the install, replace /dev/sda1 by the correct
> partition:
>
> # mkdir /mnt/linux
> # mount /dev/sda1 /mnt/linux
> # systemd-nspawn -qD /mnt/linux
> # passwd root
>
> or
>
> # passwd username
>
> if you don't use a root account, but sudo only, if so replace "username"
> by the name of the first user (UID 1000).
>
> Push Ctrl+D to leave the container.
>
>
> Regards,
> Ralf
> _______________________________________________
> Linux-audio-user mailing list
> Linux-audio-user@email-addr-hidden
> http://lists.linuxaudio.org/listinfo/linux-audio-user
>

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Received on Sat Jan 21 12:15:01 2017