Linux-audio-user September 2019

linux-audio-user@lists.linuxaudio.org

40 participants
44 discussions

by Joe Hartley

Hi, all. I'm considering replacing my M-Audio Delta 1010 an Mackie Big Knob monitor controller with an RME Babyface Pro so that I have preamps available at my desktop without breaking out my big mixer, and hardware volume control for my monitors. I know a few folks here have the Babyface Pro (Hi, Fons and Brent!) and I'm curious as to whether you're all still happy with it. I've been reading that in the class-compliant mode, which is required for Linux use), that various features are not enabled. My biggest concern is about phantom power, as I'd seen a mention that PP is only settable from the TotalMix software, which is a no-op in CC mode. I'm also interested in any "gotchas" or anecdotes about living with this unit under Linux. Thanks! -- ====================================================================== Joe Hartley - UNIX/network Consultant - jh(a)brainiac.com Without deviation from the norm, "progress" is not possible. - FZappa

5 years, 12 months

[Music]: Cooking Meth (an experiment)

by Jeanette C.

Hey hey, whilst on holiday I did not only play the piano and embarrassingly sweet ways. My friend has a very lovely studio with a powerful Linux machine and some outboard equipment. So as an experiment, we did record a very short electronic piece. For now, I'd like to show withgout further comments about the experimental nature, maybe it is obvious after all: http://juliencoder.de/nama/cooking_meth.ogg http://juliencoder.de/nama/cooking_meth.mp3 Feedback is welcome, especially if something strikes you as particularly odd about it. :) Or if you just happen to like to really hate it. :) Best wishes, Jeanette -- * Website: http://juliencoder.de - for summer is a state of sound * SoundCloud: https://soundcloud.com/jeanette_c * Youtube: https://www.youtube.com/channel/UCMS4rfGrTwz8W7jhC1Jnv7g * GitHub: https://github.com/jeanette-c * Twitter: https://twitter.com/jeanette_c_s I can't believe it's what I see That the girl in the mirror The girl in the mirror Is me <3 (Britney Spears)

6 years

How to automatically start zita-j2a/a2j with jack?

by Steven Kruyswijk

Hi all, For a sound playback system I'm putting together, based on a Raspberry Pi 3, I'm looking to have 4 channels of input and output, and to have the system to run automatically at startup. For this, I'm wondering how to (best) execute zita-a2j and zita-j2a; I've tried two methods that don't work: 1. ask Qjackctl to execute the following script after startup: sleep 5 zita-j2a -d hw:CODEC_1 2. execute this script: qjackctl (with auto-start) sleep 10 zita-j2a -d hw:CODEC_1 Executing the zita-j2a manually after Qjackctl has finished starting the jack server does work. Any pointers greatly appreciated! Cheers, Steven -- Sent from: http://linux-audio.4202.n7.nabble.com/linux-audio-user-f5.html

6 years

It's been a while

by Will Godfrey

I've had a very long 'dead' spell where I couldn't come up with anything completely new and original, but I finally set out to compose something for this month's KVR contest. After leaving it a few days, I listened again and found I liked it enough to post a copy on Soundcloud :) Hope you like it too. https://soundcloud.com/soft-sounds/morning -- Will J Godfrey http://www.musically.me.uk Say you have a poem and I have a tune. Exchange them and we can both have a poem, a tune, and a song.

6 years, 1 month

kdenlive - audio time delay

by Daniel Wilhelm

Hello All, i have a special little audio problem with kdenlive which is annoying me a lot, perhaps you can reproduce it or have an solutiuon: I like to do video cuts exactly synchronized with music song beats. So i would like to "tap in" the beats with markers before cutting to have the cut positions to snap to. That's not possible on my system, i always have about 500ms of delay when i listen to the music track and tap in the beats. So the markers are always a little to late and out of sync... Can you reproduce this? Do you have an idea? I am on Arch latest kernel, KDE, Ryzen System, tried it on Pulseaudion and Firewire external Audio Interface, Same Problem. Thanks for ideas, Daniel. -- ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ Daniel Wilhelm

6 years, 1 month

Re: [LAU] Using a memory file system?

by Nehemiah St-Danger

Hello! I am familiar with this error you described. What is the SSD's file system formatted to? I get the same error when writing to my NTFS partition. I can't remember where I read this but it is best to record to ext4 or another more Linux friendly format. Hope this helps! Best, n!

6 years, 1 month

Analysing (debugging) USB port performance

by Lorenzo Sutton

Hi LAU, I have anecdotally, but recurrently observed on laptops - including a rather recent one - that there is always a 'best' USB port for external sound cards. For instance, on my latest machine with a decent 'realtime audio' configuration/set-up (real-time kernel, /etc/limits stuff, 'performance' CPU governor, (wireless) network switched off), I'm able to have a pleasant xrun-free session recording in Ardour including a bunch of tracks with effects playing at 64 frames and period of 3 with a relatively cheap card (UMC202) on one of the USB ports. On the other hand, in the exact same conditions I get incidental xruns at even 128 frames and xrun instability at 64 frames on the other USB ports. I wonder: 1. Is there a more scientific (well, precise at least) method to assess this USB port performance? What to test or look into? 2. Is there a way to change (e.g. improve the not-so-good USB port performance) OS/software wise, or is this usually hard-wired in notebooks? 2a. Are IRQs relevant on laptops and if so can a whole USB port (or the device attached to it) be optimised from the OS? Of course I _can_ live with one 'good sound-card port' on a laptop but I'm quite curious about people's experiences and the gurus' wisdom - albeit on my former machine this was the left-side port which was closer to where the sound-card usually sits, now it's on the right, too bad! :) Hopefully other LAU have mused about such USB-related mysteries in the past... Lorenzo.

6 years, 1 month

Using a memory file system?

by Jostein Chr. Andersen

Hi, I have no problems with xruns and that stuff during recording with Harrison Mixbus, but rarely (but very annoying when it happens), Mixbus complains that my system can't catch up. I'm using three SSD disks, one for the system, one for audio projects and one for my sound libraries. I can usually record on very short latencies when also playing or trigger software players or synths without getting into trouble, but occasionally, Mixbus32C (and even Ardour) says that the system can't catch up and the recording is interrupted. This is not very fun when I'm in a creative mode and need everything to flow, I normally make sure that every track I hear is a wave track as much as possible in order to avoid this problem and my SSDs are Samsung EVOs. So here is what I'm thinking and wondering: Is it possible (or any idea) to record into a RAM file system while recording and let the OS shuffle everything into the SSD during less busy periods? I have 32 GB RAM so it's no worries when it comes to RAM size. If it might be an idea, what's the best way to do it? I might have to look further into IRQ's and so on but can't see anything else that the system is very optimized. I have a i7-4790K CPU@4GHz, the soundcard has exclusive access to IRC 19 and I have done all the ordinary audio settings an so on. So for now, I'm really curious to find out if a RAM-solution is anything good or not. What do you think? Jostein

6 years, 1 month

Re: [LAU] Subject: Re: Using a memory file system?

by Jostein Chr. Andersen

Hi Ralf! On 2019-09-27 18:29, Ralf Mardorf wrote: > Hi, > > my machine is using Toshiba SSDs with periodic trim. Toshiba > fortunately > provides ocz-ssd-utility for Linux, so it's easy to update the firmware > with Linux. > > Is your firmware up to date? Probably not, I will investigate. > Are you using periodic or continuous trim? Once every Friday. > https://wiki.archlinux.org/index.php/Solid_state_drive#Continuous_TRIM > > Take a look at the Links provided by the warning, > https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/tree/dri… > https://en.wikipedia.org/wiki/Trim_(computing)#Disadvantages . > > Some troubleshooting related hints: > https://wiki.archlinux.org/index.php/Solid_state_drive#Troubleshooting I will read the links and see what to do. The read and write speeds om my system seems to be very good, so I need to dive deep into this. Thank you for your answer, I will walk through the links/information you have provided! :-) Jostein

6 years, 1 month

Re: [LAU] Linux-audio-user Digest, Vol 151, Issue 18

by Scott

On 9/26/19 6:00 AM, linux-audio-user-request(a)lists.linuxaudio.org wrote: > Are you sure you have the right card selected if you want the HDMI > output? My machine shows 'Intel PCM' and 'Intel HDMI' separately. > In Alsamixer, select soundcard with F6 Alsamixer shows three options (plus the "enter device name" pick). Two are USB devices and the third is "HDA Intel PCH". I'd been assuming that was the HDMI, but maybe not? Maybe the HDMI is simply unrecognized? I'm hoping the welter of information I posted earlier can reveal that (to people who know something about this.) Note that I do get video out of the HDMI port without issue; it's not that the hardware is off.

6 years, 1 month

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Linux-audio-user September 2019