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<strong>VS1003</strong>8 FUNCTIONAL DESCRIPTION8.6.9 SCI_HDAT0 and SCI_HDAT1 (R)For WAV files, SCI_HDAT0 and SCI_HDAT1 read as 0x7761, and 0x7665, respectively.For WMA files, SCI_HDAT1 contains 0x574D and SCI_HDAT0 contains the data speed measuredin bytes per second. To get the bit-rate of the file, multiply the value of SCI_HDAT0 by8.for MIDI files, SCI_HDAT1 contains 0x4D54 and SCI_HDAT0 contains values according to thefollowing table:HDAT0[15:8] HDAT0[7:0] Value Explanation0 polyphony current polyphony1..255 reservedFor MP3 files, SCI_HDAT[0. . . 1] have the following content:Bit Function Value ExplanationHDAT1[15:5] syncword 2047 stream validHDAT1[4:3] ID 3 ISO 11172-3 MPG 1.02 ISO 13818-3 MPG 2.0 (1/2-rate)1 MPG 2.5 (1/4-rate)0 MPG 2.5 (1/4-rate)HDAT1[2:1] layer 3 I2 II1 III0 reservedHDAT1[0] protect bit 1 No CRC0 CRC protectedHDAT0[15:12] bitrate ISO 11172-3HDAT0[11:10] sample rate 3 reserved2 32/16/ 8 kHz1 48/24/12 kHz0 44/22/11 kHzHDAT0[9] pad bit 1 additional slot0 normal frameHDAT0[8] private bit not definedHDAT0[7:6] mode 3 mono2 dual channel1 joint stereo0 stereoHDAT0[5:4] extension ISO 11172-3HDAT0[3] copyright 1 copyrighted0 freeHDAT0[2] original 1 original0 copyHDAT0[1:0] emphasis 3 CCITT J.172 reserved1 50/15 microsec0 noneVersion: 1.06, 2012-03-16 34
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