XMOS VocalFusion XVF3510, Руководство пользователя

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XM-014232-PC 47
CHANNEL (SOURCE) VALUE DEFINITION
USB_TO_DEVICE_DIFFERENCE 2
Half of the difference between ch0 and ch1 of USB input from host to
device.
I2S_TO_DEVICE_AVERAGE 3 Average of I2S input to device.
I2S_TO_DEVICE_DIFFERENCE 4 Half of the difference between ch0 and ch1 of I2S input to device.
PIPELINE_OUT_0 5 Pipeline output channel 0
PIPELINE_OUT_1 6 Pipeline output channel 1
USB_TO_DEVICE_0 7 USB input channel 0 from host to device
USB_TO_DEVICE_1 8 USB input channel 1 from host to device
I2S_TO_DEVICE_0 9 I2S input channel 0 to device
I2S_TO_DEVICE_1 10 I2S input channel 1 to device
MIC_IN_0 11 Ch0 Microphone input seen by the pipeline
MIC_IN_1 12 Ch1 Microphone input seen by the pipeline
PACKED_PIPELINE_OUTPUT 13
pack 16kHz pipeline output on some 48kHz output (See Appendix J:
Capturing packed samples for further information)
PACKED_MIC 14
pack 16kHz mic input to pipeline on some 48kHz output
(See Appendix J: Capturing packed samples for further information)
PACKED_REF 15
pack 16kHz reference input to pipeline on some 48kHz output
(See Appendix J: Capturing packed samples for further information)
PACKED_ALL 16
pack 1 channel of 16kHz mic, reference input and pipeline.
When this option is used, the other channel of the same output also
gets PACKED_ALL set in its IO map.
(See Appendix J: Capturing packed samples for further information)
NOTE: The
MIC_IN_0
and
MIC_IN_1
signals are at 16kHz. If they are routed to a 48kHz output they
will be sample repeated three times. No antialiasing filter is applied.
The following section illustrates how to use the IO mapping and scaling commands.
Using the
SET_IO_MAP
command, the user can choose the sources that get routed to the following 3
destinations -
}
the USB output from device to host
}
the I2S output from device
}
the reference going into the device
For instance, to route I2S channel 0 (= 9 as shown in the Source table) input to the device to USB
channel 1 output from device ( = 1 as shown in the destination table), the command is:
vfctrl_usb SET_IO_MAP 1 9
where the first argument “1” refers to
USB_FROM_DEVICE_1
as shown in the destination table and the
second argument “9” refers to
I2S_TO_DEVICE_0
in the source table.