Universal asio driver For wdm audio Instruction Manual

2. ASIO Buffer Size
Use the slider to adjust the ASIO buffer size for the device currently highlighted. Smaller buffer size 
means lower latency. Once you hear crackles or audio becomes distorted, you need to increase the buffer 
size. ASIO buffer size directly relates to audio latency. Thus, you want to get a rather small value here.
3. Load Default Settings
Pressing this button will reset all configuration options to their initial defaults. Use when audio initially 
worked and you later got lost in the configuration process.
4. Switch To Advanced Mode
Switches the control panel into “advanced” mode, where you can fix things or completely mess them up 
at your disposal. “Advanced” mode is explained in the “Advanced Configuration” section of this 
document.

---

Advanced Configuration
Once the control panel has been switched to advanced mode, things begin to look a little more complicated. 
You will have noticed that the items in the device list are now expandable. By expanding the device list, you 
can now fully explore the WDM audio architecture of your system.
The device list contains Devices, Device Interfaces and so called “Pins” (this is Microsoft(r) lingo). The 
figure above illustrates how they interrelate in the WDM KS hierarchy.
Using the button next to each entry, you can now selectively enable/disable each particular item in the 
device list. This way, you can also create multi-device-setups.
Multi-device-setups require that all the devices involved are running from the same clock source. You can 
achieve this by daisy-chaining devices via S/PDIF etc. Fortunately, most USB devices will automatically 
synchronize themselves for as long as the host controllers they are connected to have a common clock 
source, which is trivially true for the USB host controllers embedded in the south bridge on any mainboard.
Note: If devices are not accurately synced, their audio streams are likely to drift apart over time!
Note: If devices are not accurately synced, their audio streams are likely to drift apart over time!
On the right side of the panel are the advanced controls (5..9).