USB AUDIO 2.0 REFERENCE DESIGN XMOS, USB AUDIO 2.0 REFERENCE DESIGN Datasheet - Page 27

• Manufacturer Part Number: USB AUDIO 2.0 REFERENCE DESIGN
• Description: USB AUDIO 2.0 REFERENCE DESIGN
• Manufacturer: XMOS

Specifications of USB AUDIO 2.0 REFERENCE DESIGN

• Design Resources: USB AUDIO Schematic
• Main Purpose: Audio, Audio Processing
• Embedded: Yes
• Utilized Ic / Part: XS1-L1
• Primary Attributes: Audio data up to 24-bit @ 192kHz
• Secondary Attributes: I²S and S/PDIF
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: 880-1017

As mentioned in 3.4.2, the mixer can also handle volume setting. If the mixer
The mixers can receive the following control commands from the Endpoint 0 thread:
The mixer can be controlled from a host PC. XMOS has a sample application showing
USB Audio Software Design Guide
For each possible output, a mapping exists to tell the mixer what its source is. The
possible sources are the USB outputs from the host, the inputs for the audio interface
or the outputs from the mixer units.
is configured to handle volume but the number of mixes is set to zero (so the
component is solely doing volume setting) then the component will use only one
thread.
3.7.1 Control
3.7.2 Host Control
how to control the mixer. For details, contact XMOS.
SET_SAMPLES_TO_HOST_MAP
SET_SAMPLES_TO_DEVICE_MAP
SET_MIX_MULT
SET_MIX_MAP
SET_MIX_IN_VOL
SET_MIX_OUT_VOL
Command
Table 11: Mixer Component Commands
Sets the source of one of the audio
streams going to the host.
Sets the source of one of the audio
streams going to the audio driver.
Sets the multiplier for one of the in-
puts to a mixer.
Sets the source of one of the inputs to
a mixer.
If volume adjustment is being done
in the mixer, this command sets the
volume multiplier of one of the USB
audio inputs.
If volume adjustment is being done
in the mixer, this command sets the
volume multiplier of one of the USB
audio outputs.
Description
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