LP9 bug w/ USB DAC

We have a session w/ audio recorded in at 88.2 and all LP9 audio settings set appropriately.
In the Audio MIDI Setup, we have an M-Audio 610 (firewire) front end and a Benchmark DAC1 Pre (USB) back end.
In playback, the M-Audio is without issue at 88.2, and with LP9 closed, so is the Benchmark.
However, as soon as LP9 launches before selecting a session, it consistently flips the Benchmark into 96 in the A/M Setup.
Once the 88.2 session is up, if in the A/M Setup the Benchmark is switched back to 88.2, within a second it gets flipped back to 96. With LP closed, no issue.
If we "play" like this, we get LP errors saying incompatible output device setting, so LP can read the Benchmark's setting.
One guess is that LP is seeing the USB OUT device as if it's the OS 10.5.8 "Built-in Output", which has only 44.1 / 48 / 96 available as selections.

Servi wrote:
We have a session w/ audio recorded in at 88.2 and all LP9 audio settings set appropriately.
Meaning you have the sample rate in Logic set at 88.2.
What is set as Logic's audio device?
In the Audio MIDI Setup, we have an M-Audio 610 (firewire) front end and a Benchmark DAC1 Pre (USB) back end.
Unless you're used Audio/MIDI setup to create an "Aggregate Device" it's irrelevant to Logic.
Are you using an aggregate device setup?
In playback, the M-Audio is without issue at 88.2, and with LP9 closed, so is the Benchmark.
However, as soon as LP9 launches before selecting a session, it consistently flips the Benchmark into 96 in the A/M Setup.
Once the 88.2 session is up, if in the A/M Setup the Benchmark is switched back to 88.2, within a second it gets flipped back to 96. With LP closed, no issue.
If we "play" like this, we get LP errors saying incompatible output device setting, so LP can read the Benchmark's setting.
One guess is that LP is seeing the USB OUT device as if it's the OS 10.5.8 "Built-in Output", which has only 44.1 / 48 / 96 available as selections.
This is confusing, generally speaking you don't want your pro audio gear to be selected as anything in A/M setup, that's basically for the Mac's audio setup, Logic's audio system interfaces with core audio but operates independently.
1. What is the audio device selected in Logic.
2. Is Logic's sample rate set to 88.2?
3. Have you created an Aggregate device for your two audio components?
4. do you have the two devices m-audio and Benchmark clock locked to each other?
5. Am I totally misunderstanding you...?
pancenter-

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PROBLEM with 24/96 bit-rate USB DAC that worked fine until I plugged in two

I'm using a late 2008 15" Macbook Pro that I bought Jan 2009 right before the SD card models came out. Mac OSX 10.6.4 and iTunes 9.2 are installed. I have a Nuforce Icon HDP and a CEntrance DACport 24/96 bit-rate USB DAC (external sound cards) that still work great right now. Note - 16 bit/44 Khz is CD quality, and these 24/96 files are hi-resolution downloads that are closer to SACD or DVD audio.
I have been evaluating a new third 24/96 USB DAC plugged directly into the Macbook USB port (no hub) which has been working fine for over 2 weeks with 24/96 bit-rate lossless music files in iTunes. Audio Midi Setup is set for 24/96 to match the music file's resolution. After making suggestions to the manufacturer they made some improvements and sent me a new version to listen for the differences.
I listened to the new one for a day and it worked fine, but when I plugged in the original test sample into the second USB port at the same time as the new one in order to compare them, the sound became garbled and noisy. This never happened when either one was plugged in by itself. Note, if I make changes to the DAC's bit-rate in Audio Midi Setup I usually close iTunes first and then re-open it when I am done.
Upon hearing this new problem I unplugged both of the new USB DACs and plugged just one of them back in, but now it causes iTunes music playback to pause when one is plugged in and set for 24/96 in audio midi setup. Prior to plugging in both at the same time, either one worked just fine by itself. There is no reason when unplugging one or the other that they shouldn't start working again. But now I can't play any 24/96 music through either one anymore. In quicktime player the songs don't pause like with iTunes, but there is no sound coming through even with just one DAC plugged in at a time. Then I discovered that if I go into Audio Midi Setup application and lower the bit rate to 24/48 then iTunes will resume playing again and I can hear the music fine with iTunes or Quicktime player.
Basically, my Macbook Pro has now lost the ability to play 24/96 bit rate with either of these new USB DACs, when they both worked fine before I plugged them in at the same time. More confusing is that they use the same USB receiver chip as in one of the DACs that I mentioned above in the first paragraph, and both the HDP and DACport still work fine at 24/96 bit-rate. It's only these two new USB DAC that require me to lower the bit rate in Audio Midi Setup to 24/48 in order to listen through them, and this wasn't a problem as recently as yesterday!
The computer is acting like some setting needs to be wiped out - it's DEFINITELY NOT the USB DAC's that are faulty because they still both work fine at 24/96 on my wife's iMac (I'm afraid to try plugging in both at the same time to the iMac in case I screw that Mac up too).
I have reset the PRAM a few times, and this doesn't fix the problem. I thought maybe the com.apple.audiomidisetup.plist file could be corrupted and deleted it, but that didn't help. I don't know what to try next to get the Macbook to start fresh when trying to use these devices, short of having to re-install OSX.
Please, does anyone have a suggestion of how I can make the Macbook forget it ever saw these two USB DACs, and let me start fresh so they start working normally again? I do dozens of reviews for Head-fi.org and I can't afford to have my Macbook Pro compromised like this, which could prevent me from doing some reviews or evaluating new products.

UPDATE:
As noted in the first post, both of these newer USB DAC work fine at 24/96 on my wife's iMac, so it's clear that they didn't both become defective when I connected them to the Macbook Pro at the same time.
Resetting the Macbook Pro PRAM didn't help, so I removed the hard shell laptop case to get to the battery and remove it, then reset the SMC. After that I could use the original DAC at 24/96 again, but only IF it was plugged into the rear USB port. If I plugged it into the front USB port then the sound was garbled and filled with noise. This was a vast improvement over no sound at all.
Then I switched to the replacement/updated DAC, but I got no sound at all from either USB port at any bit-rate. And returning to the original DAC again now results in no sound again.
Sigh... I will reset the PRAM and SMC again, and see how far I can get with this. I'd still love some help. Thanks!

Possibility to use new Mac mini with an USB-DAC?

Anybody knowing anything about the possibility to use the new Mac mini with an USB-DAC. My reason for the question is that I've heard that USB3 doesn't handle sound. I'm thinking about to buy a mac mini and use it as an HTPC and signalsource together with NAIM DAC-V1.
// Rode orm

What I have heard that there are a few USB2 audio devices that
have had some issues with USB3, but USB3 itself is supposedly
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I would check with the makers of the DAC to see if there are any
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Multiple Audio out: usb dac audio out and hdmi out

Good afternoon everyone, I have a 2010 mac mini with the following audio set up.
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this is quite disappointing because if I want to listen to music with the amplifier and then watching a simple video with mac mini and tv only I need to go back to the audio preferences and set up manually each time.
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Thanks a lot and gretings from Italy

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Pulseaudio and USB Dac

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pcm.pulse {
type pulse
ctl.pulse {
type pulse
pcm.!default {
type pulse
ctl.!default {
type pulse
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default:CARD=CS46xx
Sound Fusion CS46xx, CS46xx
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front:CARD=CS46xx,DEV=0
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rear:CARD=CS46xx,DEV=0
Sound Fusion CS46xx, CS46xx - Rear
Rear speakers
center_lfe:CARD=CS46xx,DEV=0
Sound Fusion CS46xx, CS46xx - Center LFE
Center and Subwoofer speakers
surround40:CARD=CS46xx,DEV=0
Sound Fusion CS46xx, CS46xx
4.0 Surround output to Front and Rear speakers
surround41:CARD=CS46xx,DEV=0
Sound Fusion CS46xx, CS46xx
4.1 Surround output to Front, Rear and Subwoofer speakers
surround50:CARD=CS46xx,DEV=0
Sound Fusion CS46xx, CS46xx
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Sound Fusion CS46xx, CS46xx
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iec958:CARD=CS46xx,DEV=0
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IEC958 (S/PDIF) Digital Audio Output
null
Discard all samples (playback) or generate zero samples (capture)
default:CARD=default
USB Audio DAC , USB Audio
Default Audio Device
front:CARD=default,DEV=0
USB Audio DAC , USB Audio
Front speakers
surround40:CARD=default,DEV=0
USB Audio DAC , USB Audio
4.0 Surround output to Front and Rear speakers
surround41:CARD=default,DEV=0
USB Audio DAC , USB Audio
4.1 Surround output to Front, Rear and Subwoofer speakers
surround50:CARD=default,DEV=0
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5.0 Surround output to Front, Center and Rear speakers
surround51:CARD=default,DEV=0
USB Audio DAC , USB Audio
5.1 Surround output to Front, Center, Rear and Subwoofer speakers
surround71:CARD=default,DEV=0
USB Audio DAC , USB Audio
7.1 Surround output to Front, Center, Side, Rear and Woofer speakers
iec958:CARD=default,DEV=0
USB Audio DAC , USB Audio
IEC958 (S/PDIF) Digital Audio Output

denisfalqueto wrote:
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Hope that helps.
I was trying to do it manually. pavucontrol doesn't work with the ubuntu font packages. :-(
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resolving dependencies...
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Delay on audio playback with FiiO e10 USB DAC

Hello,
My USB DAC playback is not working correctly. When I start the playback of any music stream, it takes a while (around a second or less) before I actually hear anything. The problem also occurs if short silent periods are present in the audio file/stream. The only way I can listen these problematic files/streams without the skipping is by keeping the master channel active all the time by playing some other audio along with problematic stream.
I have had this problem on openSUSE 12.3 too, and I was not able to solve it there either.
On Windows 7, however, this very same problem occurs only if I choose to use any of the 24 bit audio depth settings for the DAC.
Here is a screenshot to demonstrate the Windows scenario:
http://s10.postimg.org/xzwx302jd/fiio_delay.png
I have been trying out various things things without success, such as:
From Arch's PulseAudio wiki:
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- Setting the default fragment number and buffer size in PulseAudio
- Laggy sound
- Realtime scheduling
Here is some general information about my current Arch system and sound settings:
OS: Arch Linux x86_64
Kernel Release: 3.14.1-1-ARCH
WM: KWin
DE: KDE
Processor Type: Intel(R) Core(TM) i5-3570K CPU @ 3.40GHz
Sound settings: ALSA + PulseAudio
This problem did exist even before I installed Pulseaudio.
aplay -l :
**** List of PLAYBACK Hardware Devices ****
card 0: PCH [HDA Intel PCH], device 0: ALC898 Analog [ALC898 Analog]
Subdevices: 1/1
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card 0: PCH [HDA Intel PCH], device 1: ALC898 Digital [ALC898 Digital]
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Subdevice #0: subdevice #0
card 1: NVidia [HDA NVidia], device 3: HDMI 0 [HDMI 0]
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card 1: NVidia [HDA NVidia], device 7: HDMI 1 [HDMI 1]
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card 1: NVidia [HDA NVidia], device 8: HDMI 2 [HDMI 2]
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driver: <module-alsa-card.c>
owner module: 9
properties:
alsa.card = "3"
alsa.card_name = "DigiHug USB Audio"
alsa.long_card_name = "FiiO DigiHug USB Audio at usb-0000:07:00.0-2, full speed"
alsa.driver_name = "snd_usb_audio"
device.bus_path = "pci-0000:07:00.0-usb-0:2:1.1"
sysfs.path = "/devices/pci0000:00/0000:00:1c.7/0000:07:00.0/usb5/5-2/5-2:1.1/sound/card3"
udev.id = "usb-FiiO_DigiHug_USB_Audio-01-Audio"
device.bus = "usb"
device.vendor.id = "1852"
device.vendor.name = "GYROCOM C&C Co., LTD"
device.product.id = "7022"
device.product.name = "DigiHug USB Audio"
device.serial = "FiiO_DigiHug_USB_Audio"
device.string = "3"
device.description = "DigiHug USB Audio"
module-udev-detect.discovered = "1"
device.icon_name = "audio-card-usb"
profiles:
output:analog-stereo: Analog Stereo Output (priority 6000, available: unknown)
output:iec958-stereo: Digital Stereo (IEC958) Output (priority 5500, available: unknown)
off: Off (priority 0, available: unknown)
active profile: <output:iec958-stereo>
sinks:
alsa_output.usb-FiiO_DigiHug_USB_Audio-01-Audio.iec958-stereo/#0: DigiHug USB Audio Digital Stereo (IEC958)
sources:
alsa_output.usb-FiiO_DigiHug_USB_Audio-01-Audio.iec958-stereo.monitor/#1: Monitor of DigiHug USB Audio Digital Stereo (IEC958)
ports:
analog-output: Analog Output (priority 9900, latency offset 0 usec, available: unknown)
properties:
iec958-stereo-output: Digital Output (S/PDIF) (priority 0, latency offset 0 usec, available: unknown)
properties:
.asoundrc :
pcm.!default {
type hw
card 3
ctl.!default {
type hw
card 3
-- mod edit: read the Forum Etiquette and only post thumbnails http://wiki.archlinux.org/index.php/For … s_and_Code [jwr] --
Last edited by voodur (2014-04-23 22:24:35)

emeres wrote:Does this behaviour continue with pulseaudio killed? Use alsa directly to narrow the problem down first.
Yes. It did exist even before I installed pulseaudio.
emeres wrote:Check different resolutions, sample rates and channels. Try to determine the lowest buffer and period size, that the DAC accepts.
If by this you mean this, I went through that guide and it did not make any difference.
I found out that sometimes some audio formats, such as wav or mp3 do not produce this flaw. I gathered stats about this here. VLC was used for playback and displaying the information. Amarok behaves similarly.
emeres wrote: You probably load snd-usb-audio module with no options. Try loading it with "nrpacks" using different settings (default is 8, try 1, 2).
I am not sure if this is the way to do it, but I followed this guide and added file: "usbsound.conf" to "/etc/modprobe.d/". usbsound.conf has line: "options snd_usb_audio nrpacks=2". I tried changing the nrpacks to various values and booted after every change, but it did not make difference to the audio skipping.
What could it be that .xm (and every other tracker music format) and .ogg files are not playing like mp3 or wav?
Sorry for delayed reply and about that image
Last edited by voodur (2014-05-06 12:37:57)

Airport Extreme: Using USB to send music to a USB-DAC

Has anyone tried this? Can I send music data through the USB Port on the extreme to an external USB DAC (digital to analog converter)?
Would I still be able to use a USB hub and attach an external hardrive as well as a DAC?
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Thanks.

No there is no way to output music via the USB port on the AirPort Extreme base station (AEBS).

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Bug Report:
Setup:
Macbook 1st Gen (2.0 Ghz)
Mac OS X Leopard 10.5 Clean Install
Sandisk Cruzer Crossfire 4GB USB Flash Drive (in either port)
Repro:
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The lights on the flash drive never light back up after wake from sleep. Navigating the drive, or trying to eject it results in a "you removed the device without ejecting it first" message.
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