Insignia IN-CS102 User Manual (English) - Page 13
Wma Operation, Audio Dsp Mp3/wma Decoder, Caution
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OPERATION KEY Assigned IN Searching mode(Table 1) AS/PS BND/LOU M1 M2 M3 M4 M5 M6 Mode Select ENTER A, B, C, 1 D, E, F, 2 G, H, I, 3 J, K, L, 4 M, N, O, 5/ Directory DOWN P, Q, R, 6/ Directory UP MOD S, T, U, 7 MANU/SKIP DOWN V, W, X, 8 MANU/SKIP UP SEL DSP VOLUME KNOB Y, Z, SPACE, 9 CHARACTER SHIFT RIGHT _, -, +, 0 CHARACTER SELECT (A, B - 8, 9, 0) VOLUME KONB (ENCODER) & MANU/SKIP UP/DOWN buttons: Searching file and directory during Navigation. WMA OPERATION The unit that can play the WMA disc and the operation is the same with MP3 operation described above. AUDIO DSP (MP3/WMA DECODER) The audio DSP converts MP3/WMA stream data sent from the CD-ROM decoder to PCM data. The following standards and bit rate are supported. Standard MPEG1 Audio LAYER3 (48kHz/ 44.1kHz/ 32kHz) MPEG2 Audio LSF LAYER3 (24kHz/ 22.05kHz/ 16kHz) Windows Media Audio (32kHz) Windows Media Audio (44.1kHz) Windows Media Audio (44.1kHz) Windows Media Audio (48kHz) Bit Rate (kbps) 320,256,224, 192,160,128, 112,96,80,64, 56,48,40,32 160,144,128, 112,96,80,64, 56,48,40,32, 24,16,8 48 48 320,256,192, 160,128,96, 80,64,48 192,160,128 Supported Mode STEREO JOINT STEREO DUAL CHANNEL SINGLE CHANNEL STEREO JOINT STEREO DUAL CHANNEL SINGLE CHANNEL STEREO SINGLE CHANNEL STEREO STEREO The audio DSP automatically identifies the supported bit rate and mode, and sampling frequency. MP3 and WMA must be identified by the microcontroller. CAUTION: VBR of WMA can be played back if the bit rate is 48 kbps or higher. If a bit rate of less than 48 kbps exists in a stream, that stream cannot be correctly played back. You are suggested to play the WMA stream data with the sampling frequency of 44.1kHz and the bit rate over 128kbps, then you can get better effect. 13