Texas Instruments DEM-PCM2912A EVM 3.3.2 Volume Settings

3.3.2 Volume Settings

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Basic Operating Set-Up—Mac OS

Follow these steps to configure the volume settings for headphones, microphone, and the recordingoptions.

To set the headphone volume:

Step 1. Open the Audio MIDI Settings options ( Application →Utility →Set Audio MIDI), as illustrated inFigure 3-14 . Alternatively, open the Output tab of the Sound options, as illustrated inFigure 3-13 .

Step 2. Set the headphone volume and the audio output levels from –76 dB to 0 dB, and set thedesired mute.

To set the record volume:

1. Open the Audio MIDI Settings options ( Application →Utility →Set Audio MIDI), as illustrated inFigure 3-14 . Alternatively, open the Input tab of the Sound options, as illustrated in Figure 3-12 .2. Set the recording level from –12 dB to +30 dB, and set the desired mute.

Figure 3-14. Audio Midi Setting Window (Mac OS)

SBAU141 – January 2009 Set-Up Guide 29Submit Documentation Feedback

Contents

Main Page Contents Page Page Page Preface Read This First Page Chapter 1 Description 1.1 IntroductionPCM2912A 1.1.1 Key Features 1.2 Pin Assignments and Terminal Functions PCM2912APJT (TopView) Pin Assignments and Terminal Functions Figure 1-1 shows the pin assignments for the PCM2912A. Table 1-1 lists the terminal functions. Figure 1-1. PCM2912A Pin Assignments Table 1-1. PCM2912A Terminal Functions Table 1-1. PCM2912A Terminal Functions (continued) 1.3 Functional Block Diagram www.ti.com SBAU141 January 2009 Description 13Submit Documentation Feedback Functional Block Diagram Figure 1-2 illustrates the functional block diagram of the DEM-PCM2912A EVM. Page Chapter 2 Getting Started 2.1 Electrostatic Discharge Warning Electrostatic Discharge Warning 2.2 Block Diagram 2.3 Interface and Connections Chapter 3 Set-Up Guide Page 3.1.2 Volume and Mute Settings Page Page Page Page 3.2.2 Volume Settings Page Page Page Page 3.3.2 Volume Settings 3.3.3 Sampling Frequency Page Page Chapter 4 Evaluation and Measurements 4.1 Measurements for Dynamic Characteristics 4.2 Playback Performance Playback Performance Table 4-1. Line Output Playback Performance Table 4-2. 32- Headphone Output Playback Performance Table 4-3. 16- Headphone Output Playback Performance 4.3 Recording Performance Chapter 5 Schematic, PCB Layout, and Bill of Materials Page Page 5.3 Component List Component List Table 5-1 lists the bill of materials for the DEM-PCM2912A EVM. Table 5-1. Bill of Materials Page Page IMPORTANT NOTICE