Linux-audio-dev August 2006

linux-audio-dev@lists.linuxaudio.org

52 participants
31 discussions

[linux-audio-dev] LAC-Konzertreport auf SWR2 15.5. 23h (German only)

by Michael Iber

Hi lists, my little report on the lac-concerts and some other subjects of the lac in Karlsruhe will be broadcasted tomorrow on SWR2 JetztMusik Magazin at 23h. Michael

17 years, 7 months

[linux-audio-dev] Re: [linux-audio-user] Recording ADAT inputs on RME hammerfall 9636/52

by Stephen Cameron

Well, mixed results tonight. I was able to get some sound to go across the ADAT cables from the PC to the AW4416. But not good sound. On the bright side, I think I more or less understand connecting things up with jack, ecasound, and so on. On the bad side, so far it's not working too well. I monitored things with "jackmeter" and this meter registered peaks near 0dB for the stuff I was playing with ecasound, and pretty high levels for the most part. On the AW4416, the levels were registering between -30dB and -48dB. I guess I don't understand how ADAT works. I was under the impression the signal going across the cables was digital -- and so to get a reduction in levels like that, I would expect some digital numbers would have to go from being big numbers to being small numbers, which seems unlikely thing to happen to numbers encoded as pulses going down a cable. So I conclude I don't know how ADAT works, except it's not as I imagined it did. Oh, and besides a drastic loss of signal level, the signal was distorted strangely. Hard to describe. This may be due to xruns... I haven't got things to work without xruns yet, but that shouldn't cause a drop in levels, right? Just kind of choppiness, dropouts, crappy sound, right? Transfering from the AW4416 to the PC did not work at all. on capture_1 and capture_2, I got very low level white noise apparently. Are those the s/pdif ports? On the other channels input was dead silence. I tried both ADAT ports on the RME board, with similar results on each. I tried swapping the two ADAT cables in case one of the cables was bad... this did not seem to make a difference. Maybe the RME just transmits harder than the Yamaha, so it's signal makes it across (just barely, crossing the finish line at -48dB) while the yamaha's signal dies. I did change the RME's frequency to 44.1kHz in qjackctl's setup window. Maybe there are some clues in here: [root@zuul R15]# cat /proc/asound/R15/rme9652 RME Digi9636 (Rev 1.5) (Card #2) Buffers: capture f6a00000 playback f6400000 IRQ: 10 Registers bus: 0xea000000 VM: 0xf88a2000 Control register: 48029 Latency: 1024 samples (2 periods of 4096 bytes) Hardware pointer (frames): 1024 Passthru: no Clock mode: autosync Pref. sync source: ADAT1 ADAT1 Input source: ADAT1 optical IEC958 input: Internal IEC958 output: Coaxial only IEC958 quality: Consumer IEC958 emphasis: off IEC958 Dolby: off IEC958 sample rate: error flag set ADAT Sample rate: 44100Hz ADAT1: No Lock ADAT2: Sync ADAT3: No Lock Timecode signal: no Punch Status: 1: off 2: off 3: off 4: off 5: off 6: off 7: off 8: off 9: off 10: off 11: off 12: off 13: off 14: off 15: off 16: off 17: off 18: off __________________________________________________ Do You Yahoo!? Tired of spam? Yahoo! Mail has the best spam protection around http://mail.yahoo.com

17 years, 11 months

[linux-audio-dev] Voice and pitch recog libraries

by Iain Duncan

I'm planning on some trying out some voice and pitch recognition stuff for some ear training utilities. Wondering if anyone can tell me which of the many FOSS libraries for both would be best. Cross platform a bonus, but not essential. Thanks Iain

18 years, 2 months

[linux-audio-dev] Greenphone

by Jens M Andreasen

I stumbled on this one today: http://www.linuxdevices.com/news/NS8030785497.html - Trolltech, best known for development tools and Linux application stacks for phones and other mobile devices, will ship an "open" Linux-based phone in September. The "Greenphone" features a user-modifiable Linux OS, and is meant to jumpstart a third-party native application ecosystem for Linux-based mobile phones. [...] So far I've figured out that it's an Xscale of the kind with mmx, which suits my purposes just fine. And that there is a /dev/dsp in there somewhere :-) I have no idea what kind of price point they are considering, but I have notifyed my significant other that this is the *ultimate* christmas present for a u**x geek ... I suppose one will have to "play" it by wawing ones hand in front of the camera?

18 years, 2 months

[linux-audio-dev] I'd like my brain back (idiot developer)

by Paul Davis

Re: ICube software: I found it immediately I did a shell-based search on the webhost where it used to be located. Sorry for the noise.

18 years, 2 months

[linux-audio-dev] Re: Which sequencer framework for a simple MIDI drum looper ?

by Marcell Mars

i really recommend pyseq and midikinesis by peter brinkmann... you can find it here: http://www.math.tu-berlin.de/~brinkman/software/ after playing around in python interactive shell (actually ipython for me) for a bit i got note playing in fluidsynth.. this is how it looked like: 1 : import pyseq 2 : seq = pyseq.MidiTee('miditi') ## after this you can find miditi with aconnect -lo or -li or better qjackctl.. connect it with fluidsynth or some other synth and then: 3 : e=pyseq.snd_seq_event() 4 : e.setNoteOn(0, 60, 127) 5 : seq.callback(e) this was way easier than anything else i ever tried... i dunno if this is the right way to do that but i just feel to say: all kudos to brinkman ;)

18 years, 2 months

[linux-audio-dev] i'd like my software back (ICube MIDI sensor kit)

by Paul Davis

several years ago, i wrote an system to control an ICube MIDI Sensor interface, described here: http://equalarea.com/paul/icube unfortunately, the actual software has gone missing, even google cannot find it. if anyone has a copy of the software, i'd like to get a copy of it.

18 years, 2 months

[linux-audio-dev] Mailinglist for JJack

by Jens Gulden

Hello, there now is a mailing list for JJack, the Java bridge API for JACK. This was suggested by Esben Stien. Maybe the list will grow to become a helpful source of information about JJack. You are invited to register at https://lists.berlios.de/mailman/listinfo/jjack-users. Jens

18 years, 2 months

[linux-audio-dev] [ANN] QLoud v.0.14

by Andrew Gaydenko

QLoud is a tool to measure loudspeaker frequency response. Find it here: http://gaydenko.com/qloud/ Changes: - a crash (hitting "Plot" with empty IR list) is fixed, - pickers values are rounded now, - multiple minor fixes and cleanup, - now "Window, msec" is a time from IR peak to cutted reverberations, which is more intuitive, I think (earlier it was equal to applied window width itself). Direct screenshot links: - main window with few SPL plots: http://gaydenko.com/qloud/screenshots/shot01.png - IR-power plot: http://gaydenko.com/qloud/screenshots/shot02.png Andrew

18 years, 2 months

[linux-audio-dev] job offer... [Fwd: Algorithm Development Manager (Full-Time)]

by Joern Nettingsmeier

hi guys! i got this job enquiry to my private address, forwarding it here in case anyone's interested. i don't know any details about this, please get back to the original author if you have any questions. regards, jörn -------- Original Message -------- Subject: Algorithm Development Manager (Full-Time) Date: Fri, 25 Aug 2006 14:04:35 +0200 (CEST) From: Sandy Perlman <sp(a)i-perlman.com> To: <nettings(a)folkwang-hochschule.de> I am a working with a Silicon Valley (Mountain View, CA) company that is looking for an Algorithm Development Manager. This is a fulltime role. I would appreciate any referrals. Our client provides advanced noise suppression solutions for enhanced voice communication to the mobile, VOIP, PC and auto markets. Their proprietary technology, derived from human hearing biology, allows the complete removal of the most difficult and distracting noises from voice, enabling clear communication and greater network efficiency. The Manager of Algorithm Development, reporting to the VP of Engineering, will be responsible for leading and managing all algorithm development functions. Responsibilities include overseeing the creation, development, and design of the algorithms that form the basis for the company's exciting leading-edge products. This manager will actively participate in product definition, manage the team's deliverables effectively and efficiently, and work extensively with the platform and test teams to deliver product to the market. Experience required: Proven track record developing and shipping embedded software or IC products in the areas of Audio Signal Processing, Speech Enhancement, Speech Coding, Noise Reduction, or Acoustic Echo Cancellation, including algorithm development and integration, and software development. At least 2 years of experience managing signal processing or audio product development efforts from concept to production, leading a team of engineering personnel ranging from architect to entry-level engineers. Successful experience recruiting, motivating and retaining high quality engineering personnel Effective interaction with other departmental functions such as test teams marketing etc... Proven ability to effectively communicate with customers, peers and team members. Qualifications: Minimum 5 years audio/signal processing engineering experience. Minimum MS, At least 3 years experience in engineering management. Strong track record in delivering to schedules. Knowledge of patent writing and understanding of IP protection. Experience with customers, vendors, and third party relationships. Excellent communication skills, written and verbal, good presentation skills and meeting facilitation skills. If you know someone that would be a good fit, please forward this email to him or her. If you want to apply, reply to this email with your resume. For more information, send an email to info(a)ctsearch.com. Sandy Perlman Principal & Senior Recruiter, BSEE 408-723-0560 http://www.ctsearch.com https://www.linkedin.com/in/sandyperlman In business since 1989, CTSearch is an independent high technology search firm that specializes in placing technical professionals into high technology companies.

18 years, 2 months

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Linux-audio-dev August 2006