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- Can't find the answer?

Feel free to contact us at helpdesk@usb-audio.com. We'll do our best to find out.


Frequently asked questions:


- What's ASIO, USB, MME, SoundManager and dithering?
ASIO means "Audio Stream Input Output" and is a Steinberg technology of hardware to audio application connection at less CPU usage. It provides reliable sync and low latencies (Latency is the delay time due to audio processing inside the computer).
"Universal Serial Bus" V1.1 (USB) is an external peripheral interface standard for data transmission. USB works at 12Mbps and provides up to 8 uncompressed audio channels. It's also fully compatible to the new USB2 standard allowing faster access to external harddrives and CD burners (in theory up to 480Mbps). For audio USB2.0 improves samplerates and the number of channels. E.g. the latest Tascam, Alesis and Numark units are capable of doing 96kHz at 24bit full duplex and run with a fixed masterclock. That gives you a way higher sound quality compared to "classic" designs deriving the samplerate out of the USB clock which can be really bad, since there might be jitter on the USB clock - check the internet about "clock spreading" regarding this.
"SoundManager" (Mac) and "Multi Media Extensions" (Win) are first generation, high latency audio systems being supported by almost any application. CoreAudio (Mac) is a more modern approach but still in between - we work around that, too.
"Dither" is noise added to the bits that have to be cut off on converting the bit-depth. The noise isn't audible but changes the "arithmetical carry" on rounding the last bit to be used. This increases sound quality.


- What's the difference to freeware ASIO stuff?
This driver works in kernel mode without using the Windows usbaudio.sys. This means direct access to the hardware and way better performance compared to simple solutions. Those freeware drivers are nice for built-in soundcards but give way less performance if used for external devices.


- Which machines did you use for testing?
Mac: So far we had the USB ASIO driver run on Apple's G3 (classic iMac, iMac DV, iBook, etc.), G4 machines (also Cube, Titanium, dual-processor, G4 iMac, eMac and mini), G5s and MacIntel machines (including the MacPro and MacBook (pro)). Windows: You need at least 800Mhz / 256MB RAM (512MB recommended). Celeron machines seem to be less capable of providing low latency performance, still it's possible. Try to get rid of all unnecessary tasks. Switch off Index Scheduling, Anti-Virus Scanning, Firewalls, etc. (If you use the computer to connect to the internet it might be helpful to work with two partitions.) Switch the harddrive(s) to DMA mode.

Use the demo in order to find out if your PC is suitable for this. The driver supports Windows XP and Windows7.

- What software did you use for testing?
It runs with Steinberg's Cubase, Wavelab, Nuendo, Emagic's Logic, Propellerheads' Reason, Cakewalk's Sonar, Ableton's Live and Native Instruments software like PRO-52, Absynth, Reaktor and FM7, Alca Tech BPM Studio and more. ProTools9 seems to work well so far, please vote here for making Digi switch off the enforced software monitoring.
Mac: We also checked Bias' Peak, TC's Spark, MAX/MSP and Digital Performer.
Vision DSP has been reported to be compatible - you need to trash the application's "pref"-file after the first start.

- Is interface XYZ supported or do you have plans to do so?
Basically the driver only works with devices "known" from its "list". As there's a lot of units using Texas Instruments/Burr Brown chipsets without unique IDs there's a chance your "whatever" box works, but please don't blame us if it doesn't.

- After I bought it, how do I receive updates?
You will get eMail notifications about updates. It's essential that you let us know about changes of your eMail address.

- How large are those drivers?
Mac OSX: It's a compressed archive, about 3MB. We use the "*.dmg" format, so Mac drivers aren't damaged on Windows PCs. For Windows you get a keycode.

- What happens if I decide to buy a new computer?
Mac: You just tell us the new hardware address data (with XX instead of the last two digits). The driver for your new machine will be sent to you immediately.
Win: The key will still be working.

- How's the Mac OS 9 performance at 7ms of latency?
E.g. 16 notes of polyphony hosting Steinberg's The Grand on a 500MHz PowerBook is safe. :-)


- Why don't I get an answer on my eMail enquiry?
Believe it or not - the most common reason is wrong date and time settings on computers. It's just impossible to find eMails that come in with a date of one month or year ago. Loss of data for technical reasons might happen but it's really rare. If your eMails are bouncing use usb_audio@web.de instead.

- What do people say about your drivers?
Here's some comments.


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ASIO, Cubase, Cubase SX, Cubasis, Nuendo und VST System Link sind Handelsmarken von Steinberg Soft- und Hardware GmbH, UA-1A / UA-1D / UA-3 / UA-3D / UA-5 / UA-20 / UA-30 sind Handelsmarken von Edirol, einem Mitglied der Roland Group, M-1000 ist eine Handelsmarke von Roland, Digital Performer ist eine Handelsmarke von Mark of the unicorn, MSP ist eine Handelsmarke von Cycling74, MAX, Vision DSP und SonicPort sind Handelsmarken von Opcode Systems, Inc., Macintosh (Mac) ist eine Handelsmarke von Macintosh Laboratories, Inc. lizensiert an Apple Computer, Inc. - iMac, iBook, PowerBook, Cube, eMac und SoundManager sind Handelsmarken von Apple Computer, Inc., Logic Audio, Micrologic und EMI 2|6 sind Handelsmarken von Emagic GmbH, Peak und Deck sind Handelsmarken von Bias Inc., Spark ist eine Handelsmarke von t.c. works, Reason ist eine Handelsmarke von Propellerheads, Absynth, FM7, Reaktor und PRO-52 sind Handelsmarken von Native Instruments, MSE-U33, SE-U55, SE-U55X(S) und SE-U77 sind Handelsmarken von Onkyo, AudioSport Duo und Quattro sind Handelsmarken von MIDIMAN / M-Audio, UW500 ist eine Handelsmarke von Yamaha Corporation, USB ONE ist eine Handelsmarke von Media-Assistance, U2A, U24, Gigaport AG / DG, Audiotrak, Maya 7.1 und Optoplay sind Handelsmarken von ESI (EgoSys), USB Studio ist eine Handelsmarke von Swissonic Switzerland, USB3 ist eine Handelsmarke von Aardvark, iMic ist eine Handelsmarke von Griffin Inc., Extigy ist eine Handelsmarke von Creative Labs, Mbox ist eine Handelsmarke von Digidesign, D2VOX ist eine Handelsmarke von I-O Data, Digital Sound Station ist eine Handelsmarke von SKNET, Celeron ist eine Handelsmarke von Intel corporation und Windows (Win) und MultiMedia Extensions (MME) sind Handelsmarken von Microsoft corporation
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  Listen to Edit_H: the band the USB ASIO driver was originally developed for...

Edit_H

 

 
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AUDIVA