Universal asio driver For wdm audio Instruction Manual

8. Always Resample 44.1<->48 kHz
ASIO4ALL can do real time resampling of 44.1 kHz audio to/from 48 kHz. Resampling will 
automatically take place whenever ASIO4ALL is opened for 44.1 kHz and the WDM driver does not 
support this sample rate.
There may, however, be instances in which case an AC97 will support 44.1 kHz by resampling internally. 
More often than not, however, AC97 resampling quality is extremely poor and/or prone to stability 
issues. To work around this, you can enable this option. With at least one incarnation of the SoundMax 
WDM driver (smwdm.sys), this option absolutely must be enabled in order to make it work at 44.1 kHz 
at all.
9. Force WDM driver to 16 Bit
This option only has an effect if the supported bit depth of the WDM driver is larger than 16, but less 
than 24. Some AC97 devices report e.g. 20 Bits resolution but cannot actually be opened for more than 
16 Bits resolution. Should this be the case on your system, this option provides a workaround. Originally, 
this was introduced as a workaround for an issue with the SigmaTel AC97 WDM driver.

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Common Usage Cases Optimizations
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Playing Software Synths Live
In this scenario, you do not need audio inputs. Therefore, you best disable them all, which normally will 
provide you with a better stability at very small ASIO buffer sizes, or allow smaller buffer sizes in the 
first place. Further, you should also disable all audio outputs you do not really need. To disable channels, 
use the advanced control panel, expand the items in the WDM device list and disable everything you do 
not want to use in this setup!
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Computer As Effects Processor
Obviously, in this scenario you do need inputs. But, as always, you should disable all channels you do not 
want to use. Disable 44.1KHz resampling if it is not really necessary!
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