I'm thinking of doing some home studio recording using a set of (yet to be
purchased) bluetooth headphones as monitors.
Before I do a bunch of work on this ...
- I have a cheapie (under $5 from China) USB adaptor. Seems to be working
fine. Would a better one make a difference for my purpose?
- I tired some expensive Bose headphones and they seems to lose the
connection a lot. But, I have my cell phone in the other room right now and
the computer is playing an audio stream just fine. So, are some devices
just shitty at maintaining a connection?
- Is there a latency issue if I start to monitor something on the computer
while playing (I play sax)? I've done this is wired phones and it all
worked quite well ... but I nearly killed myself due to bad cable
management :)
- Bluetooth works with jack?
Thanks!
--
**** Listen to my FREE CD at http://www.mellowood.ca/music/cedars ****
Bob van der Poel ** Wynndel, British Columbia, CANADA **
EMAIL: bob(a)mellowood.ca
WWW: http://www.mellowood.ca
> a not entirely Linux related question. Has somebody ever used a powered
> USB hub connected between a computer and an USB audio interface? I
> wonder if this could cause issues.
i'm using it for my MIDI controllers since i've bought Novation
Launchpad which does not have DIN sockets.
currently 3 of them (Novation Launchpad, Novation ReMOTE Zero SL, Korg
PadKontrol) are connected via powered USB hub (Logitech) to one USB
port, and audio interface is connected to another USB port.
running this setup with AV Linux kernel (which is the best one of
those i tried for audio production purposes) and can't remember any
issues with it.
--
93 93/93
Hi,
a not entirely Linux related question. Has somebody ever used a powered
USB hub connected between a computer and an USB audio interface? I
wonder if this could cause issues.
Regards,
Ralf
Intermediate result:
Analog out 1, 2, 3, 4, 5, 6, 7, 8 and
ADAT out 11, 12, 13, 14, 15, 16, 17, 18 are available, there is audio
output.
Outputs 9, 10 are not tested.
I did listen to one after the other, not to all at the same time, so
they might or might not be in sync.
ALSA mixer is useless, the channels are stereo pairs, so you cannot
adjust a single channel. I don't care, I keep them at max output
and use the DAW's mixer, since you anyway can't rout monitoring. The
analog outputs 7 and 8 are assigned to the phones output, if you want
to use head phones, then you need to use jack to route all channels to
7 and 8. IOW seemingly you need to decide, if you want 8 analog outputs
or 6 outputs and headphones. "Main" seems to be unused. ALSA mixer
allows to set up the clock, available are "ADAT", "SPDIF" or "internal".
I chose "internal" and sync the ADA8000 by wc.
I made a Qtractor loop with 16 instances of fluidsynth DSSI and 2
instances of hexter DSSI, IOW just MIDI, no audio tracks. I used one
output of each DSSI instrument, by jack I assigned 9 DSSI outputs to
playback_7 and 9 DSSI outputs to playback_8.
Usually I use rt patched kernels, for the test I'm using a default
kernel from the official Arch repositories.
The CPU is an AMD dual-core 2.1 GHz, on an ASUS M2A-VM HDMI mobo,
without the HDMI thingy mounted.
Very seldom I get an inaudible xrun (quasi never) with the below jackd
settings.
[rocketmouse@archlinux ~]$ /home/music/presonus_test_2016-Dec/start.sh
[sudo] password for rocketmouse:
Model: 15.107.2 "AMD Athlon(tm) X2 Dual Core Processor BE-2350"
Memory Size: 3 GB + 512 MB
#free
total used free shared buff/cache available
Mem: 3792432 306800 967076 3648 2518556 3176340
Swap: 4819424 0 4819424
jack2 1.9.10.r202.gf2ece24-1
# grep VSL $0
jackd -Xalsarawmidi -dalsa -dhw:VSL -r48000 -p256 -n2 >/dev/null 2>&1 &
# uname -a
Linux archlinux 4.8.13-1-ARCH #1 SMP PREEMPT Fri Dec 9 07:24:34 CET 2016 x86_64 GNU/Linux
# rtirq status
PID CLS RTPRIO NI PRI %CPU STAT COMMAND
125 FF 90 - 130 3.1 S irq/19-ehci_hcd
130 FF 90 - 130 0.0 S irq/16-ohci_hcd
151 FF 89 - 129 0.0 S irq/17-ohci_hcd
154 FF 88 - 128 0.0 S irq/18-ohci_hcd
155 FF 88 - 128 0.0 S irq/17-ohci_hcd
157 FF 87 - 127 0.0 S irq/18-ohci_hcd
279 FF 85 - 125 0.0 S irq/18-snd_hdsp
32 FF 50 - 90 0.0 S irq/9-acpi
48 FF 50 - 90 0.0 S irq/8-rtc0
78 FF 50 - 90 0.0 S irq/26-radeon
116 FF 50 - 90 0.0 S irq/1-i8042
129 FF 50 - 90 0.0 S irq/22-firewire
132 FF 50 - 90 0.0 S irq/22-ahci[000
141 FF 50 - 90 0.0 S irq/14-pata_ati
143 FF 50 - 90 0.0 S irq/15-pata_ati
256 FF 50 - 90 0.0 S irq/7-parport0
483 FF 50 - 90 0.0 S irq/27-enp3s0
3 TS - 0 19 0.0 S ksoftirqd/0
17 TS - 0 19 0.0 S ksoftirqd/1
# zgrep PREE /proc/config.gz
CONFIG_PREEMPT_RCU=y
CONFIG_PREEMPT_NOTIFIERS=y
# CONFIG_PREEMPT_NONE is not set
# CONFIG_PREEMPT_VOLUNTARY is not set
CONFIG_PREEMPT=y
CONFIG_PREEMPT_COUNT=y
# CONFIG_DEBUG_PREEMPT is not set
# CONFIG_PREEMPT_TRACER is not set
# zgrep HRT /proc/config.gz
CONFIG_SCHED_HRTICK=y
CONFIG_SND_HRTIMER=m
CONFIG_SND_SEQ_HRTIMER_DEFAULT=y
# CONFIG_IIO_HRTIMER_TRIGGER is not set
# zgrep _HZ /proc/config.gz
CONFIG_NO_HZ_COMMON=y
# CONFIG_HZ_PERIODIC is not set
CONFIG_NO_HZ_IDLE=y
# CONFIG_NO_HZ_FULL is not set
# CONFIG_NO_HZ is not set
# CONFIG_HZ_100 is not set
# CONFIG_HZ_250 is not set
CONFIG_HZ_300=y
# CONFIG_HZ_1000 is not set
CONFIG_HZ=300
#!/bin/dash
#clear
#killall -q -9 qtractor qjackctl jackd
echo performance | sudo tee /sys/devices/system/cpu/cpu*/cpufreq/scaling_governor >/dev/null
hwinfo --cpu |grep Model | sort -u
hwinfo --memory |grep Size
echo
echo "#free"
free
echo
pacman -Q jack2
printf "\n# "
grep VSL $0
echo
echo "# uname -a"
uname -a
echo
echo "# rtirq status"
rtirq status
echo "# zgrep PREE /proc/config.gz"
echo
zgrep PREE /proc/config.gz
echo
echo "# zgrep HRT /proc/config.gz"
echo
zgrep HRT /proc/config.gz
echo
echo "# zgrep _HZ /proc/config.gz"
echo
zgrep _HZ /proc/config.gz
sleep 1
jackd -Xalsarawmidi -dalsa -dhw:VSL -r48000 -p256 -n2 >/dev/null 2>&1 &
sleep 2
qjackctl >/dev/null 2>&1 &
sleep 2
qtractor /home/music/presonus_test_2016-Dec/presonus_test_phones.qtr >/dev/null 2>&1 &
sleep 5
echo
echo
cat $0
exit
Regards,
Ralf
On Dec 25, 2016 03:20, Ralf Mardorf <ralf.mardorf(a)alice-dsl.net> wrote:
>
> On Sun, 25 Dec 2016 11:07:05 -0200, Iain Mott wrote:
> >I don't know if this is relevant, but I have with a Raspberry Pi with
> >a USB WiFi adapter and a cheapy Behringer UCA222 USB audio interface
> >(which gets all its power via the USB connection). Both USB devices
> >work independently with the Pi but require a powered hub when used
> >together. This is my Squeezebox/spotify home stereo!
>
> Thank you,
>
> this is good news. At least two of you used such a solution. Too
> bad that I can't get one at Christmas time.
I have a UCA202 and a powered USB hub. Connecting the 202 to the hub gives me a noticeable power hum that doesn't happen when connected directly to my laptop or to the hub without the hub PS connected.
It's a cheap hub - but something to be aware of.
David W. Jones
gnome(a)hawaii.rr.com
authenticity, honesty, community
http://dancingtreefrog.com
Hey All!
OpenAV has just pushed releases for Luppp, ArtyFX, Fabla, and Sorcer!
Release Video: https://youtu.be/s07wNn9Xc7s
But what's more, there's now an OpenAV Manual: detailed and useful
information
about all of the OpenAV projects, and what features they can do for you:
http://openavproductions.com/doc/
Short changelogs:
LUPPP:
- JACK FX Sends per track
- Fixes for most (all? ;) known bugs, including:
-- timing issues with clips drifing out of sync fixed
-- audio fader volume not totally silencing output fixed
- More controller scripts: Launchpad S, APC Mini, APCKey 25
- UI improvements
- Documentation at http://openavproductions.com/doc/luppp.html
ArtyFX
- 1st release based on AVTK
- New look-and-feel, same awesome DSP / presets
- No longer depends on NTK
- Documentation at http://openavproductions.com/doc/artyfx.html
Fabla
- Documentation at http://openavproductions.com/doc/fabla.html
- Look and feel upgrade for consistency
Sorcer
- Look and feel for consistency
- Documentation at http://openavproductions.com/doc/sorcer.html
In all - quite a lot of changes! Releases available from the OpenAV
Github project page: https://github.com/openAVproductions
Packagers, on-your-marks, get-set, take it easy for the holidays,
but package in the new year if you want to :)
Special shout out to Gerald Mwangi (JimsonDrift) and George Krause
for thier pull-requests and contributions to OpenAV!
Happy holidays & new year ya'll :)
Cheers, -Harry from OpenAV
--
http://www.openavproductions.com
I have 3 different PC's (one desktop, two laptops) running Ubuntustudio
16.04.
On the desktop I rarely do any capture. It uses jack/ffado/zita-lrx to
output to a AF12 as a tri-amped playback system. No issues, just works.
On the older laptop (Dell XPS1530) I routinely switch between the on-board
sound and up to 32in/8out from/to an X32 via USB. Sometimes setup to input
from the X32 and output to onboard sound. All configs with jack, again, no
issues, just works.
On my newer laptop (System76 coreI7) I can use the onboard sound with, for
example, Clementine set to output to alsa or pulse and it works fine. If I
attempt to use Ardour at the same time with it's own alsa the combined
output (if Ardour and Clem are playing) audio is distorted. Separately fine.
If I attempt to use jack, for example use qjackctl to start jack. Qjack
just hangs. To stop it I jhave to use kill -9. If I then start qjack, it
shows the I/O connections (pulse source/sink and capture/send). But if I
send audio to it from Ardour (to jack) or Clementine (jack or pulse) the
audio sounds like it's in slow motion. If I plug in the usb from the X32,
start qjackctl, set the I/O device to the X32 usb, viola, works just fine
for only the I/O ports exposed by the X32 USB. Any attempt to use mixed I/O
(as described for the Dell above) results in qjack and jackdbus hung and
only kill -9 will stop them.
I don't HAVE to have this work, but it is nice to be able to plug
headphones into the PC to monitor whats coming into Ardour from the
X32...but, I'm wondering if I'm missing something simple, or this is just
the way this particular combo of hardware is going to work.
Trouble shooting suggestions? Or, just leave it as an unsolved mystery? ;)
Regards,
Mac
Hi
While with the previous pedal simulations I've done, I goes for the
transistor based vintage gear from the 60s, this one is one of the mid
90s. The HotBox, is a well known tube preamp with interactive tone
controls.
In this simulation I go for the distorted/overdrive Channel and
implement a click-less true bypass (POWER), instead the clean channel,
which the HotBox usually comes with.
enjoy
https://github.com/brummer10/GxHotBox.lv2
On Tue, 20 Dec 2016 02:18:11 +0100, Ralf Mardorf wrote:
>I already compared it's phones output with the phones output of a RME
>HDSPe AIO. A while ago I had bad luck, there was too loud computer
>noise audible by the apart from this good phones output
of the AIO ;). The phones output of the AIO is good, it's usable, if
there are no computer noise issues. I don't know if the PreSonus' output
is usable, even without computer noise.
