Other options

There are a few other, lesser used, options available. These are shown in Table 29.

Table 29 Other defines

Define	Description	Default
XUA_USB_EN	Allows the use of the audio subsytem without USB	1 (enabled)
INPUT_VOLUME_CONTROL	Enables volume control on input channels, both descriptors and processing	1 (enabled)
OUTPUT_VOLUME_CONTROL	Enables volume control on output channels, both descriptors and processing	1 (enabled)
XUA_CHAN_BUFF_CTRL	Enables event based communication between XUA_Buffer_Ep() and XUA_Buffer_Decouple() which significantly reduces power consumption (approx 40 mW on xcore.ai) at the cost of consuming two extra channel-ends. Consequently this option may not be viable on some high end configurations which feature multiple digital interfaces such as SPDIF or ADAT.	0 (disabled)