Texas Instruments DEM-PCM2912A EVM

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Basic Operating Set-Up—Windows XP

To set the microphone sidetone:

1. Open the Speakers options from the Volume selection box (on the Audio tab) or the Advancedselection box (on the Volume tab); see Figure 3-8 . Alternatively, double-click the speaker icon (ifdisplayed) in the lower right-hand area of the Windows taskbar (at the bottom of the screen); seeFigure 3-7 .2. Set the volume and the mute levels for the microphone sidetone from –76 dB to 0 dB, as shown inFigure 3-9 . The initial volume setting upon installation is approximately –8 dB.

Figure 3-9. Speaker Window for Volume Setting (Windows XP)

To set the record volume:

1. Open the Sound options from the Control Panel. ( Start →Control Panel →Sound)2. Open the Sound and Audio Devices Properties dialog box and select the Microphone tab, asFigure 3-10 illustrates.

Figure 3-10. Sound and Audio Devices Properties—Audio Tab (Windows XP)

SBAU141 – January 2009 Set-Up Guide 25Submit 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