miniDSP Ltd, Hong Kong /
/ Features and specifications subject to change without prior notice
17
7
CONFIGURING
DSP
SETTINGS
The UMA-8 is a versatile microphone array which can operate in 2 modes:
•
DSP mode: The 7 MEMS are beamformed to a 2ch signal for the PC. Advanced settings of the GUI are
available for control. Audio output is 16kHz. A stereo output is being sent to the I2S_OUT0 (J3.1header). A
3
rd
party external board is therefore required to output analog audio(e.g. I2S amplifier module or I2S DAC
module)
•
RAW mode: 8ch of audio (7ch coming from the MEMS micr 1 ch from spare PDM input) are
available as raw audio (non processed). Sample rates are available as 11.2/16/32/44.1/48kHz.
Note that in RAW mode, the UMA-8 will output the RAW signal from the MEMS without any digital gain
(typically applied in 2ch DSP mode). You may require your own application to boost the signal.
The below information will highlight settings for the DSP mode. In the RAW mode, no processing is enabled and
no configuration is available.
NOTE
: The UMA-8 MicArray tool targets advanced users looking for customization (E.g. DSP features) and some
settings might render the UMA-8 unusable. In the event that you’d like to “Restore to default” settings, follow
this operation:
1)
Unplug USB 2) Press Switch 2&3 (SW2&3 on top of board) 3) Plug USB again.
The below GUI is a real time interface which will sync onboard setting when you CONNECT to the board.
Any changes/modifications are real time and will be stored on the onboard flash for subsequent reboots.
