Linux-audio-user March 2015

linux-audio-user@lists.linuxaudio.org

56 participants
56 discussions

by mrmoo＠nc.rr.com

I realize this isn't strictly a *Linux* audio question, but my question is actually platform-independent. I've recently realized that if I want to keep doing my vinyl to AIFF project on my new MacBook Air (running Yosemite), that Audacity doesn't officially support Yosemite. Does anyone else use both? Or (for whatever reason) has anyone else had reason to have to migrate from Audacity to SoX? (I admit one issue I have yet to even explore before installing SoX, is whether I can even use the headphone jack for analog input, or will I have to get an analog to USB converter?) Thanks in advance, if anyone has thoughts. -Mark (longtime absentee, now lurker)

10 years

using home jack server (or pulse audio) as an audio sink for sound from android. possible?

by Athanasios Silis

Hi all, i wonder if I can redirect audio from my android mobile phone to a jack server (preferably) or pulse audio server (not so preferably) through wifi, in much the same way this can be done through bluetooth. So I already have a jack server running and the easiest would seem to have jack running on my android and acting as a jack client, to send audio channels to a jackd server that is connected with m home audio system. I am willing to consider any preposition that involved using wifi for the audio routing, rather than bluetooth. Thanks!

10 years

Re: [LAU] Problems with sample rate and recordings (Mackie onyx > 1640-i < Firewire > Debian )

by Chris Caudle

> Date: Thu, 26 Feb 2015 17:18:35 +0100 > From: sub <subvertao(a)inventati.org> > Message-ID: <54EF475B.8040601(a)inventati.org> > i received a mail from the band in which they tell me > that the mix is faster and at a higher pitch than the > audio they recorded through a video camera at the > concert. Video cameras record at 48k rate, so someone will need to rate convert. Either the camera audio will need to be converted to 44.1k or your audio will need to be converted to 48k. Which you choose probably does not matter, but everyone involved needs to know and agree on the chosen project sample rate. If the final output will be a video then converting every thing to 48k is probably the easiest choice. If the final output will be a CD (or audio only files) then probably 44.1k is the easiest choice. If you will have both a video and audio only files, my choice would be working in 48k and then sample rate convert the final mix to 44.1k for CD. -- Chris Caudle

10 years, 1 month

Raspberry PI, internal audio IF + testing new USB IF

by Carlos sanchiavedraz

Hello dear all. I'm testing a small interface for some musical and technological projects which has an instrument input jack on one side and no audio output, just USB on the other side. This IF works great but you have no physical audio output to monitor/hear sound, so I thought I could enable internal audio IF (as I've done on other devices) and that will be the audio output instead of needing another second IF to get audio from. So I decided to rescue some past investigations I made when first researching about RPi, along with the great content generated by some dear great folks in here, and some new research one after each problem. First started from a Raspbian 2012 version which I had already tweaked for a headless autojamming/instrument effects/looper, but got many issues making step by step progresses that I briefly point here FWIW: - Enabled internal IF on Raspbian 2012 [1] - Found mmap problem regarding using Jackd with internal IF [2], even tried a module somebody compiled - Tried switching to the new platform version, Raspbian 2015 (raspberrypi 3.2.27+) but there wasn't even /proc/asound - Couldn't get to load snd-bcm2835 kernel module for internal soundcard [4] - Finally I got an error from the very raspi-config regarding internal audio IF [5] Although I continue researching, I guess somebody here has already gone through some of this, but I'm wondering if it's already an abandoned thing by the makers themselves this thing of the internal IF thing. Thanks as always. Greetings all. +info: [1] enable internal souncard on Raspbian 2012 https://duckduckgo.com/?q=%22raspberry+pi%22+enable+internal+soundcard&t=de… http://www.raspberrypi.org/forums/viewtopic.php?f=66&t=18573 http://stackoverflow.com/questions/12144972/jack-audio-connection-kit-jackd… [2] enable mmap to run jack with internal soundcard on Raspbian 2012 https://martinezjavier.wordpress.com/2013/04/27/mmap-support-for-raspberry-… https://www.hifiberry.com/forums/topic/jackd/ [3] cat: /proc/asound: No such file or directory https://duckduckgo.com/?q=%22cat%3A+%2Fproc%2Fasound%3A+No+such+file+or+dir… http://forums.debian.net/viewtopic.php?t=74914 http://forum.ubuntu.ru/index.php?topic=99987.105 http://forums.debian.net/viewtopic.php?p=415341 [4] error when loading snd-bcm2835 kernel raspberrypi 3.2.27+ module for internal soundcard on Raspbian 2015 https://duckduckgo.com/?q=%22libkmod%3A+ERROR+..%2Flibkmod%2Flibkmod.c%3A55… http://www.raspberrypi.org/forums/viewtopic.php?f=44&t=36445&p=305808 [5] error raspi-config when enabling audio via minijack on Raspbian 2015 https://duckduckgo.com/?q=raspberry+pi+%22there+was+an+error+running+option… http://www.hifiwigwam.com/showthread.php?115856-Raspberry-Pi-2/page3 -- C. sanchiavedraZ: * NEW / NUEVO: www.sanchiavedraZ.com * Musix GNU+Linux: www.musix.es

10 years, 1 month

Cutting the USB cord :-)

by Jonathan E. Brickman

I have been trying to strategize cutting the USB cord (right now, one USB, one Firewire...) for my portable synth on and off for a long time; I really don't like wearing out USB ports and cables !!!! Was just perusing some of the AoIP conversation and thinking...and then a thought was given, did a search, and found: https://www.hifiberry.com/ So, at least in theory, for about $160 or so, I could get one of those and an RPi 2.0 starter kit, run netjack and qmidinet, and have a 96kHz wifi audio interface with MIDI...? Anyone see an obvious catch? -- Jonathan E. Brickman | jeb(a)ponderworthy.com | (785)233-9977 Ponderworthy | http://ponderworthy.com Music of compassion; fire, and life!!!

10 years, 1 month

Mac and PC

by Len Ovens

I have been reading a manual for an AoIP (ravenna) SW sound card. There is a very interesting comparison between a Mac and a win-pc. This is not a special card, just a standard GB ethernet card connected to a Ravenna i/o box (Horus). Windows: 48K = 64 i/o 96k = 32 i/o 192 = 16 i/o 384 = 8 i/o latency: 64 samples - not recomended 128 - ok - but not default 256 -recomended At 192k, smaller buffer sizes are ok, but 64 is minimum (like jack at 32/2) Mac: 64 i/o at all sample rates latency 32/48/64 (defaults to 32) Is this the hw or the os? the mac gui shows if the computer is running ptp or not, but the windows one doesn't. maybe that is the difference. -- Len Ovens www.ovenwerks.net

10 years, 1 month

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Linux-audio-user March 2015