Texas Instruments DEM-PCM2912AEVM User Manual page 13

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To set the microphone sidetone:
The volume setting of the microphone sidetone is controlled by the individual application software on the Mac.
For example, Audio Recording using QuickTime
sidetone from –76dB to 0 dB.
After this process is complete, the system volume setting for each component is maintained even if EVM is
plugged in/out.
3.1.2.3 Sampling Frequency
Under the Mac OS X operating system, select a specific sampling frequency because the sampling frequency
cannot be changed on nearly all application software.
To set the DAC sampling frequency:
1. Open the Audio MIDI Settings options (Application→Utility→Set Audio MIDI), as illustrated in
2. Select the Audio Input tab in the Set Audio MIDI options group, as
3. Select the desired DAC sampling frequency from seven options: 8 kHz, 11.025 kHz,16 kHz, 22.5 kHz, 32
kHz, 44.1 kHz, and 48 kHz.
SBAU141A – JANUARY 2009 – REVISED APRIL 2024
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®
(as shown in
Figure 3-10. QuickTime Audio Recording Controls
Copyright © 2024 Texas Instruments Incorporated
Figure 3-10) sets the microphone volume for
Figure 3-11 shows.
DEM-PCM2912A Evaluation Module
Software
Figure 3-11.
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