Re: [Alsa-user] Maximum word bit and sample rate for USB Audio Class 2 devices?
On Mon, Mar 26, 2012 at 10:33:28AM +0200, René Bastian wrote: Le Mon, 26 Mar 2012 10:07:51 +0200, Clemens Ladisch cladi...@googlemail.com a écrit : Nick Lidakis wrote: What the maximum word bit length and sample rate supported for alsa USB audio class 2 devices? The maximum sample size is 32 bits; there is no sample rate limit. Regards, Clemens Is there a _very good_ USB stereo interface working at 32 bis/192 kHz (or more :) with Debian 6.0 and 5.0 ? Antelope Audio Zodiac Gold does 384Khz at 32 bits: http://www.antelopeaudio.com/en/products/category/dacs Someone had emailed me that its working fine with MPD and Alsa 1.0.24 and no dmix. -- This SF email is sponsosred by: Try Windows Azure free for 90 days Click Here http://p.sf.net/sfu/sfd2d-msazure ___ Alsa-user mailing list Alsa-user@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/alsa-user
Re: [Alsa-user] Maximum word bit and sample rate for USB Audio Class 2 devices?
On Mon, Mar 26, 2012 at 02:13:22PM +0200, Clemens Ladisch wrote: René Bastian wrote: Is there a _very good_ USB stereo interface working at 32 bis/192 kHz No device is actually using 32 bits, as there is no DAC chip that is capable of outputting even 24 bits. Can you elaborate your statement? We're talking digital-to-analog conversion, right? ESS Sabre DAC decodes 32 bit audio:http://www.esstech.com/index.php?p=products_DAC And a USB Audio Class 2 device that uses said DAC chip: http://www.usbdacs.com/Products/Products.html I have an Ayre QB-9 that decodes 24bit audio to 192Khz that is also a USB Audio Class 2 device. -- This SF email is sponsosred by: Try Windows Azure free for 90 days Click Here http://p.sf.net/sfu/sfd2d-msazure ___ Alsa-user mailing list Alsa-user@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/alsa-user
Re: [Alsa-user] USB audio device problem in ALSA 1.0.23
On Thu, Sep 22, 2011 at 02:53:32PM +0200, Sean M. Pappalardo - D.J. Pegasus wrote: Hello. I am testing a new USB audio interface called the Ebox44 by Electrix. It's based on a TUSB3200A chip. But when I plug it in, dmesg shows: [ 133.992032] usb 3-1: new full speed USB device using ohci_hcd and address 2 [ 134.235928] usb 3-1: New USB device found, idVendor=200c, idProduct=1018 [ 134.235935] usb 3-1: New USB device strings: Mfr=1, Product=2, SerialNumber=4 [ 134.235939] usb 3-1: Product: Ebox44 [ 134.235942] usb 3-1: Manufacturer: ELECTRIX [ 134.235945] usb 3-1: SerialNumber: 20101128 [ 134.236181] usb 3-1: configuration #1 chosen from 1 choice [ 137.792271] usbaudio: unit 2 not found! [ 137.792337] snd-usb-audio: probe of 3-1:1.0 failed with error -5 [ 137.792403] usbcore: registered new interface driver snd-usb-audio Looking at their web page (http://www.electrixpro.com/ebox44.html) it seems as if you need to use drivers for Windows or Mac. Lookis like it's not USB Audio Class 1 or 2 compliant. -- All the data continuously generated in your IT infrastructure contains a definitive record of customers, application performance, security threats, fraudulent activity and more. Splunk takes this data and makes sense of it. Business sense. IT sense. Common sense. http://p.sf.net/sfu/splunk-d2dcopy1 ___ Alsa-user mailing list Alsa-user@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/alsa-user
Re: [Alsa-user] 24-bit support in a USB DAC
Nice DAC. How does it sound? Are there tubes in that one? Gotta love that asynchronous USB mode. - Grant Sounds fanatstic. Yes, it sports one 12Au7 tube; haven't tried any other tubes beside the Elecro-Harmonix that it came with. Has been stable as one one could ask for with Linux, MPD, and the Alix server. The MSRP is very pricey for a NOS DAC. So, I picked it used for song on Audiogon. -- The NEW KODAK i700 Series Scanners deliver under ANY circumstances! Your production scanning environment may not be a perfect world - but thanks to Kodak, there's a perfect scanner to get the job done! With the NEW KODAK i700 Series Scanner you'll get full speed at 300 dpi even with all image processing features enabled. http://p.sf.net/sfu/kodak-com ___ Alsa-user mailing list Alsa-user@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/alsa-user
Re: [Alsa-user] bit perfect audio; was: what provides libasound_module_pcm_plughw.so
Matt Garman wrote: ...and low power. Hard to not want to buy one :) What enclosure is it in? I assume since it doesn't have a native sound device, you're using the usb-sound alsa module? I can't find it now, so maybe I'm crazy, but I thought I remember reading a disclaimer not too long ago that the alsa usb-sound module was unreliable. Yes, and low power. The Kill-A-Watt meter reads a max of 3 watts when playing FLAC or MP3's. I have the slim black anodized enclosure available from PC Engines. Blends in nicely with the rest of the gear and the black Target rack. Three LED's up front for status; can be turned off if it suits you. Photos of case: http://www.pcengines.ch/case1c1blku.htm The device has no native sound, so yes I am using the usb-sound module. I have had *zero* reliability problems. Not a single skip, hiss, or other aberrant sound to complain about. And I should mention that the Wavelength DAC that I am using is one of the very few running in Asychronous mode, and I still haven't had any issues. I've been thinking about getting an external USB DAC or possibly a cheap soundcard with optical SPDIF to connect to a DAC as suggested here[1]. If I knew then what I knew now, I would have checked what input rates and formats the M-Audio Audiophile 24/96 supports. Even now I can't find any documentation that says what it *does* support! Anyway, thanks again for the informative post! Matt [1] http://rednerd.com/2009/02/06/bit-perfect-audio-with-linux-and-mpd/ I would recommend a good external DAC with native USB such as the Wavelegth's (24 bit DAC's available) or the 24 bit Benchmark DAC-1 USB. If you're on a budget I would suggest checking Audiogon periodically. I found my DAC there for less than half the MSRP. Please also look at the computer section of Head-Fi.org for recommendations on reasonably priced (and great sounding!!) USB DAC's. Other people (please do your own research) have commented that S/PDIF on motherboards doesn't provide proper isolation from digital noise. I have never used S/PDIF. -- Stay on top of everything new and different, both inside and around Java (TM) technology - register by April 22, and save $200 on the JavaOne (SM) conference, June 2-5, 2009, San Francisco. 300 plus technical and hands-on sessions. Register today. Use priority code J9JMT32. http://p.sf.net/sfu/p ___ Alsa-user mailing list Alsa-user@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/alsa-user
