User manual

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Default audio processing settings can be changed from the “PCM Defaults” and “SDM

Defaults” boxes.

Number of channels can be chosen from “Channels” selection, possible choices are

“2” for stereo, “5.1” for normal multichannel and “7.1” for extended multichannel.

DSD content can be transferred to the audio device by packing it into suitable PCM

container, two methods are allowed using the “SDM Pack” selection “uint8” to send a

byte stream and “DoP” to use the DoP v1.1 standard. The “2wire” setting enables

dual-wire channel bonding to achieve 2x higher sampling rates for both PCM and

DoP-based DSD on those DACs that support this feature.

Channel mapping is following (regardless of driver type):

0. Front Left

1. Front Right

2. Front Center

3. Low Frequency (LFE)

4. Back Left

5. Back Right

6. Side Left

7. Side Right

Length of the hardware audio buffer (in milliseconds) can be changed by using “Buffer

time” selection. It is recommended to use “Driver default”, unless audio drop-outs are

experienced. When “Driver default” is used, the audio driver defines length of the

buffer. In case of WASAPI, this is more or less fixed value. In case of ASIO, this can be

usually controlled through ASIO control panel, which can be launched by selecting

“ASIO Control Panel...” from the “Tools” menu. Values between 10 and 100 ms are

most recommended.

It is also possible to configure adjustment range of the volume control. When both

values are set to zero (0), volume control is bypassed completely.

When DAC with other bit depth than 24-bit is connected to a unidirectional interface

like S/PDIF or AES/EBU it is recommended to select correct number of bits from the

“DAC bits” selection. If measurement results for the DAC are available, a value

corresponding to linear range of the DAC can be used.

To save the settings, click the “OK” button and to discard any setting changes click the

“Cancel” button.

Note! Using one of the heavy algorithms for upsampling multichannel audio files can

require significant amount of CPU processing power!

Note! Do NOT select anything other than “None” as SDM packing, unless you are

sure your hardware supports the particular special packed mode!

5.1. DSDIFF/DSF settings

Settings for the PDM → PCM conversion process can be changed through a settings

dialog available from the “File” menu by selecting “DSDIFF/DSF settings...”. Following

dialog will be displayed.